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Assembly Source File | 1988-03-20 | 188.3 KB | 4,248 lines

TITLE Main Work Loop for Modular Sequencer NAME MB .SALL ;============================================================== ; MusicBox Modular Sequencer, Version 2 ; main module ;-------------------------------------------------------------- ; author: John Dunn ; date: 03/07/86 ; update: 03/20/88 ;-------------------------------------------------------------- ; COPYRIGHT (C) 1986 John Dunn, All Rights Reserved ; Entered into the Public Domain, March 20, 1988 ; ; Use and copying of this software and preparation of derivative works ; based upon this software are permitted. Any distribution of this ; software or derivative works must comply with all applicable United ; States export control laws. ; ; This software is made available AS IS, and the author makes no warranty ; about the software, its performance, or its conformity to any specification. ; ; Any person obtaining a copy of this software is requested to send their ; name and address address to: ; ; John Dunn, Senior Research Fellow ; Time Arts Inc. ; 3436 Mendocino Ave. ; Santa Rosa, CA 95401 ; ;============================================================== include order.asm ;-------------------------------------------------------------- include equates.asm clkadr equ 146+(23*160) ; addr of page 0 clock ;============================================================== include macros.asm ;============================================================== ; MACROS ;-------------------------------------------------------------- ; convert character x,y to an address ; call with al = video y, bx = video x ; (x= 0-79, y= 0=24) ; returns with bx = offset, ax trashed ; vxyadr macro mov ah,160 mul ah add bx,bx add bx,ax endm ;-------------------------------------------------------------- ; display priority number ; showp macro and ah,1 ;; do ms byte xor ah,1 add ah,0f8h mov byte ptr es:158[bx],ah ;; set high byte tohex ;; binary to hex mov byte ptr es:160[bx],ah ;; set the priority mov byte ptr es:162[bx],al ;; / endm ;============================================================== if not withc STACK SEGMENT para stack 'STACK' db 512 dup (?) STACK ENDS endif ;============================================================== BUFFV SEGMENT db 0 db 4094 dup (?) ; video "foo" buffer db 0 BUFFV ENDS ;============================================================== _DATA SEGMENT ASSUME DS:DGROUP, CS:_TEXT ;-------------------------------------------------------------- extrn mute:word,mutef:byte,midisf:byte,midixsf:byte extrn vartbl:near,modscr:near extrn _chrtbl:near extrn _exetbl:near extrn @dummy:near extrn _modsrc:near extrn $menu:near ; page #'s and menu extrn $dummy:near ; 25 line dummy for module text buffer extrn _modtxt:near,?modtxt:near extrn @zero:near extrn mmreset:byte,mmstart:byte extrn mmtick:word,mmcount:word,mclocks:word extrn mvlsav:near,mvlnum:abs extrn mprstf:byte ;-------------------------------------------------------------- extrn midip:byte ;-------------------------------------------------------------- public varsav,cmdflg,special,cmdloc,vpage,locsav,curadr,noop public ticka,tickis,cmdcnt,valflg,usrflg,magflg,holdv,colr,doesc public _tmpfn,_savfn,_lodfn,_bakfn,_mpab,_header,fastflg,modnum public lodflg,clrchf,midiok,curonf,asensf ;-------------------------------------------------------------- _bases dw 0 ; base seg is saved here clrchf db 0 ; clear channel flag, used by chanl tickis db 0 ; timer value after modules lodflg db 0 ; nz for 2 clocks after loading fastflg db 0 ; nz = fast as possible loops savtime dw 0 ; place to save time of day timecnt db 8 ; time count for colon flash midiss db 0 ; place to save last midi xtrn sync waiting db 0 ; nz if waiting on timer pdf db 0 ; pd values set by interrupt pdx db 39 ; / pdy db 12 ; / curonf db 0 ; nz = don't restore screen char curflg db 0 ; z to display normal cursor curcol db 017h ; 0 = cursor not being displayed curdata dw 0 ; data under the cursor savcol db 0 ; / colr db blue ; current number readout color vpage dw 0B800H ; current video page seg vpagen db 0 ; current video page number vpagep db 0 ; previous video page number curadr dw 1998 ; cursor address offset execur dw 0 ; z = don't do it modchar dw offset dgroup:$dummy; current module char list cmdcol db 0 ; command color cmdcnt db 0 ; command count cmdptr dw offset dgroup:@dummy; command pointer cmdloc dw 0 ; command location offset cmdtag dw 0 ; command label offset shosav dw 0 ; place to save it shoflg db 0 ; nz = showing output-inputs cmdflg db 0 ; nz = a command is pending magflg db 0 ; 0=no-value, 1=channel #, 2=input value errflg db 0 ; 1 = write, 2 = non-fatal read errwrd dw 0 ; dos error word byemsg dw 0 ; addr of exit msg, or 0 room db 0 ; disk room, in save files tmpsav dw offset dgroup:vartbl; place to hold a variable ptr (move) ; or modsrc addr (reincarnate) locsav dw 0 ; place to hold cmdloc, to remember hilights modnum db 0 ; module number *2 of last new module special dw noop ; place to hold exe addr of special routine usrflg db 0 ; nz when special magenta input is happening valflg db 0 ; nz when blue value input is happening mickx dw 0 ; current mickey horiz count lastx db 0 ; place to save last pdx for no-button cmds lasty db 0 ; place to save last pdy for no-button cmds holdv dw 0 ; place to hold last value offset doesc dw noop ; do this when ESC is selected cscale db 'C:C#D:D#E:F:F#G:G#A:A#B:' diradr dw 0 ; temp storage for screen directory dirptr dw 0 ; last directory file name pointer _mpab db 8Fh ; file load flags asensf db 1 ; active sensing send flag ;============================================================== ; the following are constants that may be changed either before ; assembley or with debug after MB.EXE is built. Actual number of ; bytes must remain the same, or previously saved files will be ; incompatable, causing upredictable results when loaded. ; usesf db 1 ; 1 = use _scrfn file if found midiok db 1 ; 0= off, 1= 1 MPU, 3= 2 MPU's _numpg dw 3 ; number of video pages -1 (1/3/7) ; should be 3 for CGA, 7 for EGA/VGA _scrfn db 'tutor.scr',0,0,0,0 ; screen file name ; if not found, uses screen image ; from MODSCR, last section of MBV.ASM _tmpfn db '\undo.mb$',0,0,0,0 ; file name for set/undo ; 0 in 1st byte disables _bakfn db 'previous.mb ',0 ; file name for backup ; 0 in 1st byte disables _lodfn db 'temp.mb ',0,0,0,0,0; file name for dir loading _dirfn db '*.mb ',0 ; directory file name ;============================================================== _inbuf db 128 dup (?) ; kbd input buffer _err_wp db 7,'Write Protect: Retry Ignore Quit$' _err_dx db 7,'Disk Error: Retry Ignore Quit? $' _errwx db 7,'Write Error: Retry Escape Quit? $' _errwr db 7,'Write Error: Retry Ignore Quit? $' _errver db 7,'Wrong Vers: M disabled. Escape? $' _noundo db 7,'Error in writing to Undo File.$' _opundo db 7,'Error in opening Undo File.$' _errmod db 7,'Error in reading modules. $' roomis db "Room= 20$" ;-------------------------------------------------------------- ; header format (only first 128 bytes are actually used) ; byte 0 = revision ; byte 1 = version ; byte 2 = encoding (0 = no encoding in this version) ; byte 3 = 0 ; byte 4-43 = copyright notice ; other bytes unused ;-------------------------------------------------------------- _header db version,release ; version/release word db 0,0 ; encoding = 0 = none db 'MusicBox Copyright (c) 1986, 1987 John Dunn' db 100 dup (0) ; more stuff _foo db 128 dup (?) ; scratch area ;-------------------------------------------------------------- ; the following are saved/loaded ; valsav equ $ ; start of values to save _savfn db 'temp.mb ',0,0,0,0,0; file name for saving ticka db 0CH ; timer tick (1456/mtempo) varptr dw offset dgroup:vartbl; addr of next free variable space varnow dw offset dgroup:vartbl; current variable table addr varsav dw offset dgroup:vartbl; saved variable table addr last dw 0 ; index of last module in exetbl ; also next module's priority valend equ $ ; end of values to save _DATA ENDS ;============================================================== _TEXT SEGMENT ASSUME CS: _TEXT, DS: DGROUP, SS: DGROUP, ES: NOTHING ;-------------------------------------------------------------- public loops loops dw 0 ; module loop count ;-------------------------------------------------------------- extrn _dummy:near extrn ticks:word,timer:word,midixs:byte extrn startm:near,stopm:near,startt:near,stopt:near extrn sendm:near,alloff:near,tomidi:near extrn allclr:near,allmidi:near extrn secondf:byte,seconds:word ;============================================================== ; main body of program ;-------------------------------------------------------------- ; initialization ; public _doit _doit: if withc ; if compiled with C push es ; save C regs push bp ; / push si ; / push di ; / else ; else if assembly mov ax,seg dgroup ; set data seg mov dx,ds ; save initial data seg mov ds,ax ; / mov _bases,dx ; / endif ; mov ah,25H ; set int vect mov al,24H ; int 24h for MS crit error push ds ; save data seg mov dx,cs ; get code ds mov ds,dx ; point to cerror mov dx,offset cerror; vector to mine int 21H ; set new int vect pop ds ; restore data seg ; mov cx,_numpg ; get number of pages inc cx ; +1 for loop if debug ; if debug mode, don't clr page 7 dec cx ; / endif ; / mov al,0 ; / start0: push cx ; / push ax ; / call page ; / call clx ; / pop ax ; / inc al ; / pop cx ; / loop start0 ; / mov al,0 ; set page 0 active call page ; / call shoall ; show all modules call modloc ; set module location addresses ; call savmod ; save undo modules ; call getfn ; get file name from cmd line jnc start1 ; branch if no input filename ; mov ah,3dh ; dos open file command mov al,0 ; read only mov dx,offset dgroup:_savfn; point to file name int 21H ; open the file jc start1 ; branch if open error call lodmod0 ; else load modules call showfn ; show the save filename call getdir ; show directory enterys call dopath ; show current path call dompab ; show mpad status call menus ; draw menus mov vpagen,0 ; set up for swaps mov al,1 ; show page 1 call page ; / jmp short start2 ; / ; start1: call showfn ; show the save filename call getdir ; show directory enterys call dopath ; show current path call dompab ; show mpad status call menus ; draw menus mov vpagen,1 ; set up for swaps mov al,0 ; show page 0 call page ; / ; start2: call startt ; start system timer call initpd ; initialize pointing device test midiok,-1 ; was MIDI on? jz start3 ; no, branch call startm ; yes, turn it on ; start3: mov curonf,1 ; no old cursor call curon ; activate cursor mov pdf,80h ; / call fixhlt ; fix halt status ;============================================================== ; registers that must be preserved: DS, SI ;============================================================== ; main work loop public work work: if debug ; if true compile this stuff mov al,really ; if really, really do it or al,al ; / jz really1 ; / ; mov bx,varnow ; ...display the variable list sub bx,8 ; back up a little ;-------------------------------------------------------------- ; use this stuff to show MIDI data stream comment | ; mov bx, offset dgroup:mobuf;; get next byte add bx,mobiix ;; get midi in buffer index sub bx,36 ; back up a little mov ax,mobiix mov show2,ax sub ax,moboix mov show3,ax comment ends | ;-------------------------------------------------------------- ; use this stuff to show mouse location & screen address ; mov ax,curadr ; cursor screen address mov show0,ax ; show it mov al,pdx ; cursor x mov ah,pdy ; cursor y mov show1,ax ; show it mov show2,sp ;-------------------------------------------------------------- call showw ; / call show ; / really1: ; / endif ; / ;============================================================== ; display time if on page 0 ; mov es,vpage ; set up for video page cmp vpagen,0 ; on page 0? jnz work0 ; no, branch mov ah,2ch ; dos get time function int 21h ; call dos ; test lodflg,-1 ; did a load happen jnz workt ; yes, set new time ; cmp cx,savtime ; has time changed? jz worktz ; no, branch ; workt: mov colr,cyan ; set color to cyan test lodflg,-1 ; did a load happen jnz workt2 ; yes, don't check hrs cmp ch,byte ptr savtime+1 ; hrs changed? jz workt1 ; no, branch ; workt2: mov al,ch ; setup for ascii mov bx,clkadr ; address of decimal readout call todec ; show it in decimal mov bx,clkadr ; zip ms zero mov byte ptr es:[bx],0b3h ; / ; workt1: mov al,cl ; setup for ascii mov bx,clkadr+6 ; address of decimal readout call todec ; show it in decimal mov bx,clkadr+6 ; zip ms zero mov byte ptr es:[bx],':' ; / ; worktx: mov savtime,cx ; save time mov colr,blue ; fix color worktz: dec timecnt ; seconds changed? jnz work0 ; no, exit ; mov timecnt,64 ; yes, set new count mov bx,clkadr+7 ; flip colon color xor byte ptr es:[bx],green ; / ;-------------------------------------------------------------- ; test to see if a request to change pages has been asserted ; work0: cmp pdf,82H ; change page if pdf=2 jnz work0a ; else, go on and pdf,07fh ; clear pen-down flag call curoff ; no cursor while changing pages mov al,vpagep ; get previous page number call page ; swap with current mov curonf,1 ; don't restore screen data call curon ; do turn on the cursor work0x: jmp workx ; back to the work loop ;============================================================== ; test to see if a command request has been asserted ; work0a: cmp pdf,81h ; do command if pdf = 1 jnz work02 ; else check for user input and pdf,07fh ; clear pen-down flag cmp pdx,2 ; in vertical menu area? jbe workm0 ; yes, go do it ; cmp vpagen,0 ; on page 0? jnz work01 ; no, branch cmp pdy,10h ; horiz menu? jz workh ; yes, go do it cmp pdy,15h ; below file area ja work0x ; yes, not interested cmp pdy,11h ; in file area? ja workf ; yes, go process work01: jmp work00 ; no, go process screen commands workf: jmp workf0 ; branch to file area processing workh: jmp workh0 ; branch to horiz menu processing ;============================================================== ; no putton push, if user input was requested (cmdflg =7 ), and ; if x,y position has changed, process user input ; work02: mov ax,11 ; check for mouse movement int 33H ; / cmp mickx,cx ; has x changed? jnz work02a ; yes, go do it mov ah,pdy ; has y changed cmp lasty,ah ; / jz work02x ; no, then back to work loop work02a:mov mickx,cx ; save x,y mickeys mov al,pdx ; save last pdx,pdy mov lastx,al ; yes, save pdx,pdy mov ah,pdy ; / mov lasty,ah ; / cmp cmdflg,7 ; blue input? jnz work02b ; no, branch jmp work72 ; yes, process blue user input work02b:cmp cmdflg,10 ; magenta input? jnz work02c ; no, branch jmp work92 ; yes, process magenta special input work02c: work02x:jmp workx ; no, back to the work loop ;============================================================== ; Process Menu command. ; workm0: cmp pdy,7 ; page change command ja workm1 ; no, go fish call curoff ; yes, set page mov al,pdy ; / call page ; / mov curonf,1 ; don't restore screen data call curon ; cursor back on jmp workx ; back to the work loop ;============================================================== ; menu commands other than page change ; workm1: cmp pdy,8 ; ESC? jnz workm4 ; no, branch jmp workm1a ; yes, go do it workm4: cmp pdy,10 ; SET? jnz workm5 ; no, branch jmp workm4a ; yes, go do it workm5: ; workm2: cmp cmdflg,0 ; something pending? jnz workmz ; yes, split ; cmp pdy,9 ; delete? jnz workm3 ; no, branch jmp workm2a ; yes, branch to delete workm3: cmp pdy,11 ; HLT? jnz workm7 ; no, branch jmp workm3a ; yes, go do it workm7: cmp pdy,12 ; OFF? jnz workm8 ; no, branch jmp workm7a ; yes, go do it workm8: cmp pdy,17 ; mute/solo command jb workmz ; no, exit jmp workm8a ; yes, go do it ; workmz: jmp workx ; none of the above, exit ;============================================================== ; Delete command given, turn on highlite, set cmdflg to 4 ; workm2a:mov bx,5a0h ; address of DEL call turnon ; turn on mov cmdflg,4 ; set command flag = 4 mov word ptr doesc,offset workm2d; set up for ESC jmp workx ; exit ;-------------------------------------------------------------- ; escape from delete ; workm2d:mov bx,5a0h ; turn off hilight jmp turnoff ;============================================================== ; process HLT command (on/off) ; workm3a:mov bx,6E0H ; text offset test mprstf,2 ; stopped already? jz workm3b ; no, branch call turnoff ; yes, turn off highlight mov al,0fah ; send MIDI START command call allmidi ; send to all midi ports mov mmtick,1 ; reset to 1st note in measure and mprstf,0FDH ; clear halt flag jmp workx ; exit workm3b:call turnon ; turn on highlight or mprstf,2 ; set master halt the flag mov al,0fch ; send MIDI STOP command call allmidi ; / jmp workx ; exit ;============================================================== ; SET command given, save current system to temp file ; workm4a: test _tmpfn,-1 ; want to do it? jz workm4e ; no, branch ; cmp cmdflg,0 ; was it clear? jz workm4d ; yes, branch jmp workx ; no, ignore ; workm4d:mov bx,160*10 ; address of menu text call turnon ; turn on highlight call curoff ; zip cursor call allclr ; clear all midi channels ; call savmod ; save modules ; mov pdf,80h ; reset mouse flag call curon ; cursor back on mov bx,160*10 ; address of menu text call turnoff ; turn off highlight mov clrchf,1 ; setup to clear chanl workm4e:jmp workx ; exit ;============================================================== ; process OFF command (all notes off) ; workm7a: call alloff ; process all notes off jmp workx ; exit ;============================================================== ; ESC command given. ; Turn cursor off, execute DOESC, then zip DOSEC. ; If cursor is a module image, turn it off. ; Clear cmdflg. ; public _cancel,cancel _cancel: workm1a:call curoff ; cursor off cancel: mov ax,doesc ; get the esc exe addr call ax ; go do it mov doesc,offset noop ; put it to sleep call curon ; cursor back on test curflg,1 ; dragging a module around? jz workm1d ; no, branch call setcur ; yes, set cursor workm1d:mov cmdflg,0 ; clear command flag jmp workx ; exit ;-------------------------------------------------------------- ; mute/solo commands ; workm8a:test mutef,1 ; action mute or solo? jnz workm8e ; branch if mute ; mov dx,-1 ; set up solo mask mov cl,pdy ; point to the screen location sub cl,17 ; cl = 0-7 add cl,cl ; *2 for 0-14 cmp pdx,2 ; do odd? jz workm8b ; yes, branch mov ax,1 ; set flag bit shl ax,cl ; ax = bit flag for mute xor dx,ax ; set the bit cmp pdx,0 ; was this just even? jz workm8c ; yes, branch workm8b:inc cl ; +1 for 1-15 mov ax,1 ; set flag bit shl ax,cl ; ax = bit flag for mute xor dx,ax ; set the bit ; workm8c:cmp dx,mute ; same as last time? jnz workm8d ; no, branch mov dx,0 ; yes, clear solo flags workm8d:mov mute,dx ; set new solo jmp workx ; back to the work loop ;-------------------------------------------------------------- workm8e:mov cl,pdy ; point to the screen location sub cl,17 ; cl = 0-7 add cl,cl ; *2 for 0-14 cmp pdx,2 ; do odd? jz workm8f ; yes, branch mov ax,1 ; set flag bit shl ax,cl ; ax = bit flag for mute xor mute,ax ; flip the bit cmp pdx,0 ; was this just even? jz workm8g ; yes, branch workm8f:inc cl ; +1 for 1-15 mov ax,1 ; set flag bit shl ax,cl ; ax = bit flag for mute xor mute,ax ; flip the bit workm8g:jmp workx ; back to work loop ;============================================================== ; Process horiz page 0 menu ; workh0: cmp pdx,8 ; QUIT @ workh0a jnb workh01 ; / jmp workh0a ; / workh01:cmp pdx,0DH ; EXIT @ workh1a jnb workh02 ; / test room,-1 ; room to save? jz workhx ; no, ignore the command jmp workh1a ; / workh02:cmp pdx,12H ; MPAD @ workh2a jnb workh03 ; / jmp workh2a ; / workh03:cmp pdx,17H ; UNDO @ workh3a jnb workh05 ; / jmp workh3a ; / workh05:cmp pdx,1CH ; REDO @ workh5a jnb workh04 ; / jmp workh5a ; else go do it workh04:cmp pdx,21H ; SAVE @ workh4a jnb workh06 ; / test room,-1 ; room to save? jz workhx ; no, ignore the command jmp workh4a ; else go do it workh06:cmp pdx,2bh ; NAME @ workh6a jnb workh07 ; / jmp workh6a ; / workh07:jmp workh7a ; PATH @ workh7a workhx: jmp workx ; back to the work loop ;-------------------------------------------------------------- ; Turn on horiz menu command highlight. ; call with cursor on, bx = menu text offset ; public horzon horzon: push bx ; save text addr call curoff ; zip cursor pop bx ; get text addr add bx,16*160 ; offset for line mov dx,0b800h ; do page 0 only mov es,dx ; or byte ptr es:1[bx],8 ; make bright or byte ptr es:3[bx],8 ; / or byte ptr es:5[bx],8 ; / or byte ptr es:7[bx],8 ; / mov curonf,1 ; don't restore jmp curon ; cursor normal ;-------------------------------------------------------------- ; Turn off menu command highlight. ; call with cursor on, bx = menu text offset ; public horzoff horzoff:push bx ; save text addr call curoff ; zip cursor pop bx ; get text addr add bx,16*160 ; offset for line mov dx,0b800h ; do page 0 only mov es,dx ; and byte ptr es:1[bx],0f7h ; make dark and byte ptr es:3[bx],0f7h ; / and byte ptr es:5[bx],0f7h ; / and byte ptr es:7[bx],0f7h ; / mov curonf,1 ; don't restore jmp curon ; keep it right ;-------------------------------------------------------------- ; show mapb status ; dompab: mov bx,1cH+(16*160) ; offset for line mov dx,0b800h ; do page 0 only mov es,dx ; / mov al,_mpab ; get it mov ah,1 ; set bit test flag mov cl,4 ; 4 bits to do dompab0:test al,ah ; look at the bit jz dompab1 ; branch if off mov byte ptr es:1[bx],cyan; else make bright jmp short dompab2 ; branch dompab1:mov byte ptr es:1[bx],grey; make dark dompab2:inc bl ; bump pointers inc bl ; / shl ah,1 ; / loop dompab0 ; loop ret ;============================================================== ; QUIT command given, turn on highlite, set cmdflg to 6 ; workh0a:mov bx,8 ; address of QUIT cmp cmdflg,6 ; already set? jnz workh0b ; no, branch mov dx,ds ; yes, fix es = ds mov es,dx ; / test _mpab,80H ; has there been a save? jz workh0e ; no, branch call delmod ; delete temp file workh0e:jmp split ; exit workh0b:cmp cmdflg,0 ; was it clear? jz workh0d ; yes, branch jmp workx ; no, ignore workh0d:call horzon ; was clear, so turn on call tmphlt ; set temp hlt mov cmdflg,6 ; set command flag = 6 mov doesc,offset workh0c ; set up ESC jmp workx ; exit ;-------------------------------------------------------------- ; escape from QUIT ; also define "noop" as a dummy return ; workh0c:mov bx,8 ; turn off highlight call horzoff ; / call clrhlt ; clear hlt noop: ret ; "noop" is dummy return ;============================================================== ; EXIT command given, turn on highlite, set cmdflg to 18 ; workh1a:mov bx,12h ; address of EXIT cmp cmdflg,16 ; already set? jnz workh1b ; no, branch mov cmdflg,0 ; clear the command ; call horzoff ; yes, turn off highlight mov bx,3ah ; zip save highlight call horzoff ; / call curoff ; zip cursor ; call delmod ; delete temp file ; mov dx,ds ; fix es = ds mov es,dx ; / ; test _bakfn,-1 ; doing backups? jz workh1e ; no, branch ; mov dx,offset dgroup:_savfn; file already exists? mov cx,0 ; / mov ah,4eh ; dos search for first int 21h ; / jc workh1e ; branch if not already existing ; mov dx,offset dgroup:_bakfn; delete old bakfn mov ah,41h ; dos delete function call int 21h ; / ; mov dx,offset dgroup:_savfn; rename savfn to bakfn mov di,offset dgroup:_bakfn mov ah,56h ; dos rename function call int 21h ; / ; workh1e:mov dx,offset dgroup:_savfn; point to file name call savmods ; save modules test errflg,-1 ; any errors? jz workh1f ; no, branch mov dx,offset dgroup:_errwx; yes, setup message call errmsg ; do msg, get response cmp al,'Q' ; want to ignore? jz workh1f ; / cmp al,'R' ; Retry jz workh1e ; / ; ; else Escape mov pdf,80h ; reset mouse flag call curon ; cursor back on call workh1c ; fix menu & HLT status call getdir ; show directory jmp workx ; exit ; workh1f:jmp split ; exit ; workh1b:cmp cmdflg,0 ; was it clear? jz workh1d ; yes, branch jmp workx ; no, ignore ; workh1d:call horzon ; was clear, so turn on mov bx,3ah ; set save highlight call horzon ; / call tmphlt ; set temp hlt mov cmdflg,16 ; set command flag = 18 mov doesc,offset workh1c ; set up ESC jmp workx ; exit ;-------------------------------------------------------------- ; escape from EXIT ; workh1c:mov bx,12h ; turn off highlight call horzoff ; / mov bx,3ah ; zip save highlight call horzoff ; / call clrhlt ; clear temp hlt ret ;============================================================== ; set MPAB bit & display status ; workh2a:mov ah,1 ; set bit flag mov dh,pdx ; get cursor x-loc mov dl,0EH ; first match position mov cx,4 ; 4 to do workh2b:cmp dl,dh ; match? jz workh2c ; yes, branch out shl ah,1 ; bump bit flag inc dl ; bump x-loc loop workh2b ; do them all workh2c:xor _mpab,ah ; flip the mpab bit call curoff ; zip cursor call dompab ; show it mov curonf,1 ; don't restore call curon ; keep it right jmp workx ; exit ;============================================================== ; UNDO command given, turn on highlite, set cmdflg to 16 ; workh3a: test _tmpfn,-1 ; want to do it? jz workh3e ; no, branch ; mov bx,26h ; address of UNDO cmp cmdflg,17 ; already set? jnz workh3b ; no, branch mov cmdflg,0 ; clear the command ; call curoff ; zip cursor xor _tmpfn+4,1 ; switch file name call savmod ; save modules xor _tmpfn+4,1 ; switch file name call lodmod ; load modules ; call delmod ; delete just loaded file xor _tmpfn+4,1 ; switch file name ; call showfn ; show the save filename call getdir ; show directory enterys call dopath ; show current path call dompab ; show mpad status call menus ; draw menus ; mov pdf,80h ; reset mouse flag mov curonf,1 ; don't restore call curon ; cursor back on mov bx,26h ; turn off highlight call horzoff ; / mov bx,160*10 ; address of menu text call turnoff ; turn off highlight call showfn ; show exit file name call fixhlt ; clear temp HLT mov lodflg,2 ; flag that a load happened workh3e:jmp workx ; exit ; workh3b:cmp cmdflg,0 ; was it clear? jz workh3d ; yes, branch jmp workx ; no, ignore ; workh3d:mov bx,26h ; point menu text call horzon ; turn on call tmphlt ; set temp HLT mov cmdflg,17 ; set command flag = 19 mov doesc,offset workh3c ; set up ESC jmp workx ; exit ;-------------------------------------------------------------- ; escape from UNDO ; workh3c:mov bx,26h ; turn off highlight call horzoff ; / call clrhlt ; clear temp hlt ret ;============================================================== ; SAVE command given, turn on highlite, set cmdflg to 19 ; workh4a:cmp cmdflg,19 ; already set? jnz workh4b ; no, branch mov cmdflg,0 ; clear the command ; mov bx,3ah ; point to text call horzoff ; turn off highlight call curoff ; zip cursor ; mov dx,ds ; fix es = ds mov es,dx ; / ; test _bakfn,-1 ; doing backups? jz workh4e ; no, branch ; mov dx,offset dgroup:_savfn; file already exists? mov cx,0 ; / mov ah,4eh ; dos search for first int 21h ; / jc workh4e ; branch if not already existing ; mov dx,offset dgroup:_bakfn; delete old bakfn mov ah,41h ; dos delete function call int 21h ; / ; mov dx,offset dgroup:_savfn; rename savfn to bakfn mov di,offset dgroup:_bakfn mov ah,56h ; dos rename function call int 21h ; / ; workh4e:mov dx,offset dgroup:_savfn; point to file name call savmods ; save modules test errflg,-1 ; any errors? jz workh4f ; no, branch mov dx,offset dgroup:_errwr; yes, setup message call errmsg ; do msg, get response cmp al,'I' ; want to ignore? jz workh4f ; / cmp al,'R' ; Retry jz workh4e ; / jmp split ; must be split ; workh4f: mov pdf,80h ; reset mouse flag call curon ; cursor back on call workh4c ; fix menu & HLT status call getdir ; show directory jmp workx ; exit ; workh4b:cmp cmdflg,0 ; was it clear? jz workh4d ; yes, branch jmp workx ; no, ignore ; workh4d:mov bx,3ah ; point menu text call horzon ; turn on call tmphlt ; set temp HLT mov cmdflg,19 ; set command flag = 19 mov doesc,offset workh4c ; set up ESC jmp workx ; exit ;-------------------------------------------------------------- ; escape from SAVE ; workh4c:mov bx,3ah ; turn off highlight call horzoff ; / call clrhlt ; fix hlt status ret ;============================================================== ; REDO command given, turn on highlite, set cmdflg to 18 ; workh5a: test _tmpfn,-1 ; want to do it? jz workh5e ; no, branch ; mov bx,30h ; address of UNDO cmp cmdflg,18 ; already set? jnz workh5b ; no, branch mov cmdflg,0 ; clear the command ; call curoff ; zip cursor call lodmod ; load modules ; call showfn ; show the save filename call getdir ; show directory enterys call dopath ; show current path call dompab ; show mpad status call menus ; draw menus ; mov pdf,80h ; reset mouse flag mov curonf,1 ; don't restore call curon ; cursor back on mov bx,26h ; turn off highlight call horzoff ; / mov bx,160*10 ; address of menu text call turnoff ; turn off highlight call showfn ; show exit file name call fixhlt ; clear temp HLT mov lodflg,2 ; flag that a load happened workh5e:jmp workx ; exit ; workh5b:cmp cmdflg,0 ; was it clear? jz workh5d ; yes, branch jmp workx ; no, ignore ; workh5d:mov bx,30h ; point menu text call horzon ; turn on call tmphlt ; set temp HLT mov cmdflg,18 ; set command flag = 19 mov doesc,offset workh5c ; set up ESC jmp workx ; exit ;-------------------------------------------------------------- ; escape from REDO ; workh5c:mov bx,30h ; turn off highlight call horzoff ; / call clrhlt ; clear temp hlt ret ;-------------------------------------------------------------- ; NAME command, put new name in _savfn ; workh6a:call curoff ; zip cursor ; mov ah,2 ; bios set cursor position mov bh,0 ; page 0 mov dx,1023H ; x,y of cursor int 10H ; do bios int ; mov _savfn,'.' ; clear the name area call showfn ; / mov _inbuf,9 ; 8 chars max call getkey ; get them ; mov cx,8 ; put them in savfn mov bx,offset dgroup:_inbuf+2; / mov di,offset dgroup:_savfn ; / workh6b:mov al,[bx] ; get the char cmp al,21h ; / jb workh6d ; / mov [di],al ; put char in savfn buffer inc di ; bump fn pointer inc bx ; bump cmd line pointer loop workh6b ; loop to max of input chars ; workh6d:mov byte ptr [di],'.' ; set up save extension mov byte ptr 1[di],'M' ; / mov byte ptr 2[di],'B' ; / mov byte ptr 3[di],' ' ; / mov byte ptr 4[di],0 ; / call showfn ; show it mov curadr,0a44h ; set cursor to 0th char mov curonf,1 ; don't restore call curon ; but turn it on mov pdf,80h ; / mov clrchf,1 ; setup to clear chanl jmp workx ; exit ;-------------------------------------------------------------- ; PATH command, set new directory path ; workh7a:call curoff ; zip cursor ; mov ax,0b800h ; set up video seg mov es,ax ; / mov bx,58H+(16*160) ; offset for line mov ax,whi ; set color mov cx,35 ; words in line workh7b:mov es:[bx],ax ; set the word inc bx ; bump inc bx ; / loop workh7b ; do the line ; mov ah,2 ; bios set cursor position mov bh,0 ; page 0 mov dx,102CH ; x,y of cursor int 10H ; do bios int ; mov _inbuf,36 ; 36 chars max call getkey ; get them mov al,_inbuf+1 ; get number of chars mov ah,0 ; / mov bx,offset dgroup:_inbuf+2;/ mov dx,bx ; save for path add bx,ax ; point to end of string mov byte ptr [bx],0 ; null terminate ; mov ah,19h ; get current disk drive int 21h ; dos call mov _inbuf,al ; put it away ; cmp byte ptr _inbuf+2,'\' ; directory or drive? jz workh7c ; branch if directory ; mov al,_inbuf+2 ; get the new drive call touc ; make uppercase sub al,'A' ; make A=0, B=1, etc. mov dl,al ; set up for dos call mov ah,0eh ; set default drive int 21h ; dos call ; cmp byte ptr _inbuf+4,'\' ; drive change only jnz workh7d ; yes, don't change path ; workh7c:mov ah,3bh ; set new path mov dx,offset dgroup:_inbuf+2;/ int 21h ; dos call jnc workh7d ; branch if ok ; mov dl,_inbuf ; else get old drive mov ah,0eh ; set default drive int 21h ; dos call ; workh7d:call dopath ; show it call getdir ; show new directory ; mov curadr,0a56h ; set cursor to 0th char mov curonf,1 ; don't restore call curon ; but turn it on mov pdf,80h ; / jmp workx ; exit ;============================================================== ; Process file area loads, set cmdflg = 20 ; workf0: call curoff ; zip cursor mov bx,0b800H ; setup video seg mov es,bx ; / mov bx,curadr ; get cursor address mov al,es:1[bx] ; get attribute byte and al,lo ; strip highlight cmp al,yellow ; got anything? jz workf0a ; yes, branch jmp workfq ; no, cancel the command ; workf0a:cmp byte ptr es:[bx],' ' ; is it a letter ja workf1 ; yes, go on jmp workfq ; no, cancel ; workf1: dec bx ; no, back up dec bx ; / cmp byte ptr es:[bx],' ' ; look for 1st non-letter ja workf1 ; / inc bx ; point to start inc bx ; / ; cmp cmdflg,20 ; ready to do it jz workf1a ; yes, branch cmp cmdflg,4 ; DEL jz workf1b ; yes, branch jmp workf8 ; no, exit ; workf1a:test byte ptr es:1[bx],hi ; hi bit set jnz workf1b ; yes, go on jmp workfq ; no, cancel ; workf1b:mov di,offset dgroup:_lodfn ; point to file text area mov cx,8 ; 8 maximum to do workf3: mov al,es:[bx] ; get first char cmp al,' ' ; ignore spaces jna workf2 ; / mov [di],al ; put char in save file name buffer inc bx ; bump screen pointer inc bx ; / inc di ; bump text pointer loop workf3 ; loop to max ; workf2: mov byte ptr [di],'.' ; set up extension mov byte ptr 1[di],'M' ; / mov byte ptr 2[di],'B' ; / mov byte ptr 3[di],' ' ; / mov byte ptr 4[di],0 ; / ; cmp cmdflg,20 ; want to load? jz workf2a ; yes, go do it mov ah,41H ; else DEL file mov dx,offset dgroup:_lodfn ; point to file name int 21H ; zap it mov cmdflg,0 ; clear the cmd call getdir ; show directory enterys mov pdf,80h ; reset mouse flag mov curonf,1 ; don't restore call curon ; but turn it on mov bx,5a0h ; turn off DEL hilight call turnoff ; / jmp workx ; split ; workf2a: mov ah,3dh ; dos open file command mov al,0 ; read only mov dx,offset dgroup:_lodfn ; point to file name int 21H ; open the file jc workf6 ; exit if error call lodmod0 ; load modules ; workf6: call showfn ; show the save filename call getdir ; show directory enterys call dopath ; show current path call dompab ; show mpad status call menus ; draw menus ; workfx: mov cmdflg,0 ; reset mov pdf,80h ; fix mouse flag workfz: mov curonf,1 ; don't restore call curon ; but turn it on call fixhlt ; fix hlt status mov lodflg,2 ; flag that a load happened jmp workx ; exit ; workfq: mov pdf,80h ; / jmp cancel ; so forget it ;-------------------------------------------------------------- ; cmdflg was not alreay 20, setup new one ; workf8: cmp cmdflg,0 ; was it clear? jz workf9 ; yes, branch jmp cancel ; no, cancel ; workf9: mov dirptr,bx ; text location call dirnon ; highlight call tmphlt ; set temp HLT mov cmdflg,20 ; set command flag = 20 mov doesc,offset workf10 ; set up ESC mov curonf,1 ; don't restore call curon ; but turn it on jmp workx ; exit ;-------------------------------------------------------------- ; escape from DIR load ; workf10:call clrhlt ; fix hlt status call dirnoff ; lowlight ret ;-------------------------------------------------------------- ; highlight a directory file name ; call with cursor OFF ; dirnon: mov cx,8 ; 8 chars to do mov bx,0b800h ; do page 0 only mov es,bx ; mov bx,dirptr ; get last picked name dirnon1: or byte ptr es:1[bx],hi ; make bright inc bx ; bump pointer inc bx ; / loop dirnon1 ; do all 8 ret ;-------------------------------------------------------------- ; loghlight a directory file name ; call with cursor ON ; dirnoff:call curoff ; cursor on mov cx,8 ; 8 chars to do mov bx,0b800h ; do page 0 only mov es,bx ; mov bx,dirptr ; get last picked name dirnoff1: and byte ptr es:1[bx],lo ; make dark inc bx ; bump pointer inc bx ; / loop dirnoff1 ; do all 8 mov curonf,1 ; don't restore jmp curon ; keep it right ;============================================================== ; Process Screen command. ; work0bx:jmp workx ; split ; work00: call curoff ; cursor off while reading screen call cmdchk ; get new cmdloc, ptr, tag, cnt, & col cmp vpagen,0 ; on page 0? jz work0b ; yes, branch cmp cmdflg,3 ; reincarnate? jz work0b ; yes, branch call varlst ; else find the variable list or di,di ; is it good jz work0b ; no, branch mov varnow,di ; save it work0b: call curon ; cursor back on cmp cmdflg,3 ; move, copy, or reincarnate? ja workp0 ; no, process other stuff jmp work20a ; yes, branch ;-------------------------------------------------------------- ; process pending commands > 3 ; 4 = delete module ; 5 = priority swap ; 6 = bye ; 7 = user variable input ; 8 = flagged output to variable input ; 9 = special user input (magenta inputs ) ; workp0: cmp cmdflg,4 ; delete? jnz workp1 ; / jmp workpa ; yes, go do the delete workp1: cmp cmdflg,5 ; priority? jnz workp2 ; / jmp work6 ; yes, go do the priority swap workp2: cmp cmdflg,6 ; trying to QUIT jnz workp3 ; / jmp _cancel ; yes, kill it workp3: cmp cmdflg,7 ; user input value? jnz workp4 ; / jmp _cancel ; yes, set it workp4: cmp cmdflg,8 ; flagged output value? jnz workp5 ; / jmp work8 ; yes, go set the value workp5: cmp cmdflg,9 ; special user input? jnz workp6 ; / jmp work9 ; yes, go process magenta stuff workp6: cmp cmdflg,10 ; special user input? jnz workp7 ; / jmp work9 ; yes, go process magenta stuff workp7: cmp cmdflg,16 ; EXIT? jnz workp8 ; / jmp _cancel ; yes, kill it workp8: cmp cmdflg,17 ; UNDO? jnz workp9 ; / jmp _cancel ; yes, kill it workp9: cmp cmdflg,18 ; REDO? jnz workp10 ; / jmp _cancel ; yes, kill it workp10:cmp cmdflg,19 ; was SAVE set? jnz workp11 ; / jmp _cancel ; yes, kill it workp11:cmp cmdflg,20 ; was directory load pending jnz workp12 ; / jmp _cancel ; yes, kill it workp12: workpq: mov cmdflg,0 ; no, clear the flag jmp workx ; back to the work loop ;-------------------------------------------------------------- ; no command pending above 3, check if cursor is a module, ; if it is branch to work2a to do the pending create or move. ; Otherwise, check color under cursor. ; If white branch to work2e to set up a pending move/create. ; If color is not white branch to work1 for further processing. ; work20a:test curflg,1 ; already dragging something around? jz work20c ; yes, go do something with it jmp work2a ; / work20c:cmp cmdcol,7 ; is this a module pickup? jz work2e ; yes, go do it jmp work1 ; no, go do something else ;============================================================== ; Module pickup requested: don't do anything except set the module ; to be the cursor (so it can be dragged around), and set cmdflg ; to indicate a pending module create or move. If currently on ; page 0, a new module will be created, if on any other page, the ; existing module will be moved. Nothing is done, however, until ; the next command request. Modules with "*" for the module number ; are not allowed to be picked up. ; Modules with "X" will be reincarnated. ; work2e: cmp vpagen,0 ; is this page 0? jnz work2d ; no, branch mov bx,cmdloc ; get the module number mov es,vpage ; / cmp byte ptr es:2[bx],'*'; out of gas? jnz work2e1 ; no, go on jmp workx ; yes, exit work2e1:cmp byte ptr es:2[bx],'X'; a deleted module? jnz work2e2 ; no, go on jmp workr ; yes, go reincarnate it. work2e2:mov bx,cmdptr ; set up the cursor mov ax,2[bx] ; ... to be the module mov modchar,ax ; the module source text call setmod ; ... is now the cursor mov cmdflg,1 ; set the command flag jmp workx ; back to the work loop ;============================================================== ; It's not on page 0, so setup a copy of the existing module ; work2d: call curoff ; turn cursor off mov ax,varnow ; get variable table address mov tmpsav,ax ; save it mov bx,cmdptr ; set up the cursor mov ax,2[bx] ; ... to be the module mov bx,ax ; point to module source text mov di,offset dgroup:$dummy; gonna put it in the dummy mov cx,[bx] ; get number of lines in module mov [di],cx ; store in dummy buffer add di,4 ; bump index mov bx,cmdloc ; point to current screen text mov es,vpage ; get current screen seg work2d1:mov ax,es:-2[bx] ; get left word mov [di],ax ; put in dummy or byte ptr es:-1[bx],80h ; blink inc di ; bump index inc di ; / mov ax,es:[bx] ; get center word mov [di],ax ; put in dummy or byte ptr es:1[bx],80h ; blink inc di ; bump index inc di ; / mov ax,es:2[bx] ; get right word mov [di],ax ; put in dummy or byte ptr es:3[bx],80h ; blink inc di ; bump index inc di ; / add bx,160 ; next line loop work2d1 ; loop til done mov modchar,offset dgroup:$dummy ; set dummy as cursor source mov curonf,1 ; don't replace blinking label call curon ; keep it even call setmod ; dummy copy is now the cursor mov cmdflg,2 ; set the command flag mov doesc, offset work2dx; setup for ESC jmp workx ; back to the work loop ;-------------------------------------------------------------- ; escape from move ; fixes blinking module ; work2dx:mov di,tmpsav ; find variable list mov es,4[di] ; get screen seg mov bx,6[di] ; get screen addr mov di,[di] ; get number of lines mov di,2[di] ; / mov cx,[di] ; / jmp unblink ; zip blinking ;============================================================== ; Set up to drag around a gost module (module # = "X") ; workr: call curoff ; zip old cursor mov bx,cmdptr ; set up new cursor... mov tmpsav,bx ; (save MODSRC for later) mov ax,2[bx] ; ... to be the module mov bx,ax ; point to module source text mov di,offset dgroup:$dummy; gonna put it in the dummy mov cx,[bx] ; get number of lines in module mov [di],cx ; store in dummy buffer add di,4 ; bump index add bx,4 ; workr1: mov ax,[bx] ; get left word mov [di],ax ; put in dummy inc di ; bump index inc di ; / inc bx ; / inc bx ; / mov ax,[bx] ; get center word mov [di],ax ; put in dummy inc di ; bump index inc di ; / inc bx ; / inc bx ; / mov ax,[bx] ; get right word cmp ah,white ; this a label? jnz workr2 ; no, branch mov al,'X' ; yes, change number to 'X' workr2: mov [di],ax ; put in dummy inc di ; bump index inc di ; / inc bx ; / inc bx ; / loop workr1 ; loop til done mov modchar,offset dgroup:$dummy ; set dummy as cursor source mov curonf,1 ; don't replace blinking label call curon ; keep it even call setmod ; dummy copy is now the cursor mov cmdflg,3 ; set the command flag for reincarnate jmp workx ; back to the work loop ;============================================================== ; case of not currently dragging something, color <> white ; possible commands (all not page 0): ; grey: priority swap ; cyan: flag output for value input from cmdflg = 7 ; blue: value input from user ; green: value input from user ; magenta: user input work1: cmp vpagen,0 ; in page 0 jz work1x ; yes, go back to the work loop ; ; no, ( process other commands) cmp cmdcol,grey ; priority swap? jnz work1b ; no, branch jmp work60 ; yes, go do the priority swap work1b: cmp cmdcol,blue ; value input from user? jnz work1bb ; no, branch jmp work70 ; yes, go do user input work1bb:cmp cmdcol,green ; value input from user? jnz work1c ; no, branch jmp work70 ; yes, go do user input work1c: cmp cmdcol,cyan ; output value flagged? jnz work1d ; no, branch jmp work80 ; yes, process output value flag work1d: cmp cmdcol,magenta ; want special user input jnz work1x ; no, branch jmp work90 ; yes set up for special input work1x: jmp workx ; and back to the work loop ;============================================================== ; Priority selected, set cmdflg = 5 ; work60: mov cmdflg,5 ; set the flag call curoff ; turn cursor off mov ax,varnow ; get variable table address mov tmpsav,ax ; save it mov bx,cmdtag ; highlight the command mov es,vpage ; / or byte ptr es:161[bx],7; / or byte ptr es:163[bx],7; / mov curonf,1 ; don't restore call curon ; normal cursor mov doesc,offset work61 ; set up for ESC jmp workx ; back to the work loop ;-------------------------------------------------------------- ; escape from priority swap ; work61: mov di,tmpsav ; turn off highlight mov es,4[di] ; get seg mov bx,6[di] ; get addr mov byte ptr es:161[bx],grey; zip hilight mov byte ptr es:163[bx],grey; / mov curonf,1 ; don't restore cursor ret ;============================================================== ; Output flag selected, set cmdflg = 8 ; work80: mov cmdflg,8 ; set the flag call curoff ; turn cursor off mov ax,varnow ; get variable table address mov tmpsav,ax ; save it mov bx,cmdloc ; highlight the command mov locsav,bx ; (save hilight addr) mov es,vpage ; / or byte ptr es:1[bx],hi; / or byte ptr es:3[bx],hi; / mov bx,cmdtag ; get icon tag mov al,es:[bx] ; / mov ah,es:2[bx] ; / mov shosav,ax ; save it mov curonf,1 ; don't restore call curon ; normal cursor mov doesc,offset work81 ; set up for ESC jmp workx ; back to the work loop ;-------------------------------------------------------------- ; escape from flag output command ; work81: mov di,tmpsav ; turn off highlight mov es,4[di] ; get seg mov bx,locsav ; get addr and byte ptr es:1[bx],lo; zip hilight and byte ptr es:3[bx],lo; / ;-------------------------------------------------------------- ; lowlight all inputs currently associated with output ; if shoflg = 1 ; test shoflg,1 ; wanna show inputs? jz work81d ; no, branch mov shoflg,0 ; yes, zip flag mov ax,shosav ; get icon tag push ds ; save data seg mov cx,0b800H ; point to color screen mov ds,cx ; / mov cx,4000H ; 16K words to look at mov bx,0 ; set up index work81c:cmp al,[bx] ; got an icon match? jz work81e ; yes, go look ; work81b:inc bx ; no, bump address inc bx ; / loop work81c ; loop pop ds ; restore data seg mov pdf,80h ; reset mouse flag work81d:mov curonf,1 ; don't restore cursor ret ; exit ; work81e:cmp ah,2[bx] ; got a module match jnz work81b ; no, go loop cmp byte ptr 1[bx],green OR hi; is it a green label? jnz work81b ; no, go loop and byte ptr 1[bx],lo; zip hilight and byte ptr 3[bx],lo; / jmp short work81b ; go to loop ;-------------------------------------------------------------- ; process flagged output to become an input variable ; work8: call curoff cmp cmdcol,blue ; was an input variable selected? jz work8y ; yes, do it cmp cmdcol,green ; was an input variable selected? jz work8y ; yes, go doit cmp cmdcol,cyan OR hi; wanna show exitsting connections jnz work8x ; no, exit ;-------------------------------------------------------------- ; highlight all inputs currently associated with output ; mov shoflg,1 ; set the show flag call curoff ; turn cursor off mov ax,shosav ; get module icon push ds ; save data seg mov cx,0b800H ; point to color screen mov ds,cx ; / mov cx,4000H ; 16K words to look at mov bx,0 ; set up index work80c:cmp al,[bx] ; got an icon match? jz work80e ; yes, go look ; work80b:inc bx ; no, bump address inc bx ; / loop work80c ; loop ; pop ds ; restore data seg mov curonf,1 ; don't restore mov pdf,80h ; reset mouse flag work8x: call curon ; normal cursor jmp workx ; exit ; work80e:cmp ah,2[bx] ; got a module match jnz work80b ; no, go loop cmp byte ptr 1[bx],green; is it a green label jnz work80b ; no, go loop or byte ptr 1[bx],hi;yes, set the highlight or byte ptr 3[bx],hi; / jmp short work80b ; go to loop ;-------------------------------------------------------------- ; connect flagged output to input ; work8y: mov cmdflg,0 ; yes, clear cmdflg call work81 ; clear the highlight mov bx,6[di] ; get the screen addr of source module mov es,4[di] ; get screen seg of module mov dl,es:[bx] ; dl = tag character mov dh,es:2[bx] ; dh = module number tag ; mov cx,di ; calculate the output address add cx,8 ; cx = address of output value ; mov es,vpage ; get current screen seg mov bx,cmdloc ; get current variable pointer mov es:[bx],dl ; set the label to input module mov es:2[bx],dh ; / mov al,green ; set the color to green mov es:1[bx],al ; / mov es:3[bx],al ; / ; mov ax,0 ; find out which value it is work80a:sub bx,160 ; / add ax,2 ; / cmp byte ptr es:1[bx],blue jz work80a ; / cmp byte ptr es:1[bx],green jz work80a ; / mov bx,ax ; bx = word offset to variables mov di,varnow ; get current variable table mov 10[bx+di],cx ; set address of new variable ; call curon jmp workx ;============================================================== ; User value input selected, set cmdflg = 7 ; work70: mov cmdflg,7 ; set the flag call curoff ; turn cursor off mov ax,varnow ; get variable table address mov tmpsav,ax ; save it mov bx,cmdloc ; highlight the command mov locsav,bx ; (save hilight addr) mov es,vpage ; / or byte ptr es:1[bx],hi; / or byte ptr es:3[bx],hi; / mov ax,0 ; find out which value it is work70a:sub bx,160 ; / add ax,2 ; / cmp byte ptr es:1[bx],blue;/ jz work70a ; / cmp byte ptr es:1[bx],green jz work70a ; / mov holdv,ax ; save the offset ; mov bx,holdv ; read current value mov di,tmpsav ; get value table for module mov bx,10[bx+di] ; bx = address of value mov dl,[bx] ; dl = binary value mov dh,0 ; make into a word add dx,dx ; make into a word add dx,offset dgroup:@zero; dx = address pointer into number table mov bx,holdv ; get offset to the value mov 10[bx+di],dx ; store the new value mov bx,dx ; convert number addr to number mov al,[bx] ; / tohex ; convert it to ascii hex mov es,4[di] ; get seg mov bx,locsav ; get addr mov es:[bx],ah ; display number mov es:2[bx],al ; / mov al,blue+hi ; set color to blue (may have been green) mov es:1[bx],al ; / mov es:3[bx],al ; / ; mov curonf,1 ; don't restore call curon ; normal cursor mov doesc,offset work71; set up for ESC mov al,curcol ; save cursor color mov savcol,al ; / mov ax,3 ; get current position int 33h ; / mov ax,7 ; don't move cursor push dx ; / mov dx,cx ; / int 33h ; / pop dx ; / mov cx,dx ; / mov ax,8 ; / int 33h ; / mov curcol,0 ; hide the cursor mov valflg,1 ; flag value input is happening jmp workx ; back to the work loop ;-------------------------------------------------------------- ; escape from value input command ; work71: mov di,tmpsav ; turn off highlight mov es,4[di] ; get seg mov bx,locsav ; get addr and byte ptr es:1[bx],lo; zip hilight and byte ptr es:3[bx],lo; / mov al,savcol ; restore cursor color mov curcol,al ; / mov dx,199 ; maximum y mov cx,0 ; minimum y mov ax,8 ; set min, max allowable pdy values int 33h ; / mov ax,7 ; set min, max allowable pdx values mov dx,639 ; maximum x mov cx,0 ; minimum x int 33h ; set it mov es,vpage ; lowlight the menu readout mov bx,960H ; addr of decimal readout mov byte ptr es:1[bx],blue ; make dark mov byte ptr es:3[bx],blue ; / mov byte ptr es:5[bx],blue ; / mov byte ptr es:7[bx],blue ; / mov bx,0A00H ; addr of note readout mov byte ptr es:1[bx],blue ; make dark mov byte ptr es:3[bx],blue ; / mov byte ptr es:5[bx],blue ; / mov byte ptr es:7[bx],blue ; / mov curonf,1 ; don't restore under cursor mov valflg,0 ; finished with value input ret ;-------------------------------------------------------------- ; case of pdf = 0, cmdflg = 7, and change in pdx,pdy ; process value input from user ; work72: call curoff ; cursor off mov bx,holdv ; get offset to the value mov di,tmpsav ; get value table for module mov bx,10[bx+di] ; get adr of current value mov dx,mickx ; get mickey count add dx,[bx] ; add value to mickeys jz work72b ; if = 0, go on cmp dx,255 ; if = 255, go on jz work72b ; / test dh,128 ; if neg, make it 0 jz work72a ; / mov dx,0 ; / work72a:test dh,1 ; if > 255, make it 255 jz work72b ; / mov dx,255 ; / work72b:add dx,dx ; make into a word mov di,tmpsav ; get value table for module add dx,offset dgroup:@zero; dx = address pointer into number table mov bx,holdv ; get offset to the value mov 10[bx+di],dx ; store the new value mov bx,dx ; convert number addr to number mov al,[bx] ; / push ax ; save for decimal conversion tohex ; convert it to ascii hex mov es,4[di] ; get seg mov bx,locsav ; get addr mov es:[bx],ah ; display number mov es:2[bx],al ; / mov al,blue+hi ; set color to blue (may have been green) mov es:1[bx],al ; / mov es:3[bx],al ; / mov bx,960H ; address of decimal readout mov colr,blue+hi ; set highlight blue pop ax ; get the number again call todec ; show it in decimal mov bx,0A00h ; address of note readout call tonote ; show it as CM scale mov curonf,1 ; don't restore cursor call curon ; turn it back on work72x:jmp workx ; exit ;============================================================== ; Special User input selected, set cmdflg = 9 ; magflg gets set here: ; no-value--> 0 ; up/down --> 1 ; channel --> 2 ; value --> 3 ; work90: mov cmdflg,9 ; else set the flag for channel value call curoff ; turn cursor off mov di,varnow ; get variable table address mov tmpsav,di ; save it mov varsav,di ; save it mov bx,[di] ; get exe addr of special routine mov ax,40[bx] ; ax = exec addr of special mov special,ax ; save it mov bx,cmdloc ; highlight the command mov locsav,bx ; (save hilight addr) mov es,vpage ; / mov magflg,0 ; set flag for no-value cmp byte ptr es:[bx],'#'; is this a no-value cmd jz work90b ; yes, set up for no-value inc magflg ; no, set flag for up/down cmp byte ptr es:[bx],1eh; branch if up/down jz work90b ; / or byte ptr es:1[bx],hi; highlight single for channel inc magflg ; set magenta flag for channel cmp byte ptr es:3[bx],white; is this a channel cmd jz work90b ; yes, branch inc magflg ; no, set up for value change or byte ptr es:3[bx],hi; highlight double for value work90b:mov ax,0 ; find out which value it is work90a:sub bx,160 ; / add ax,2 ; / cmp byte ptr es:1[bx],magenta jz work90a ; / mov holdv,ax ; save the offset mov curonf,1 ; don't restore call curon ; normal cursor cmp magflg,3 ; want value input? jnz work90x ; no, exit mov al,curcol ; save cursor color mov savcol,al ; / mov ax,3 ; get current position int 33h ; / mov ax,7 ; don't move cursor push dx ; / mov dx,cx ; / int 33h ; / pop dx ; / mov cx,dx ; / mov ax,8 ; / int 33h ; / mov curcol,0 ; hide the cursor work90x:mov doesc,offset work91 ; set up for ESC mov usrflg,1 ; flag user input is happening mov ax,special ; get the special routine call ax ; do it jmp workx ; back to the work loop ;-------------------------------------------------------------- ; escape from special user command ; work91: mov usrflg,0 ; clear happening flag cmp magflg,3 ; data input jnz work91a ; no, branch jmp work71 ; yes, same as blue ; work91a:mov di,varsav ; turn off highlight mov es,4[di] ; get seg mov bx,locsav ; get addr and byte ptr es:1[bx],lo; zip hilight mov ax,offset noop ; reset special mov special,ax ; / mov curonf,1 ; don't restore cursor ret ; return from call ;-------------------------------------------------------------- ; process special user input routine ; work9: mov cmdflg,0 mov usrflg,0 mov ax,special jmp ax ;-------------------------------------------------------------- ; special user input routines ; case of pdf = 0, cmdflg = 9, and change in pdx,pdy ; process value input from user ; work92: cmp magflg,2 ; want channel? jz work92a ; yes, branch cmp magflg,3 ; want data? jz work92e ; yes, branch jmp workx ; no, exit work92a:mov dl,pdx ; get x value sub dl,8 ; offset by 8 jnb work92d ; branch if ok mov dl,0 ; else set to 0 work92d:cmp dl,63 ; max is 63 jna work92b ; branch if ok mov dl,63 ; else max out work92b:shr dl,1 ; /4 shr dl,1 ; / and dl,0fH ; only use low nybble mov al,dl ; load with x value mov di,varsav ; get value table for module mov byte ptr 8[di],dl; save in the output location tohex ; convert it to ascii hex mov es,4[di] ; get seg mov bx,locsav ; get addr mov es:[bx],al ; display number ; jmp workx ; exit work92e: call curoff ; cursor off mov bx,holdv ; get offset to the value mov di,varsav ; get value table for module mov dl,10[bx+di] ; get current value mov dh,0 ; / add dx,mickx ; get mickey count jz work92g ; if = 0, go on cmp dx,255 ; if = 255, go on jz work92g ; / test dh,128 ; if neg, make it 0 jz work92f ; / mov dx,0 ; / work92f:test dh,1 ; if > 255, make it 255 jz work92g ; / mov dx,255 ; / work92g:mov di,varsav ; get value table for module mov bx,holdv ; get offset to the value mov 10[bx+di],dl ; store the new value mov ax,dx ; get value to ax push ax ; save for decimal conversion tohex ; convert it to ascii hex mov es,4[di] ; get seg mov bx,locsav ; get addr mov es:[bx],ah ; display number mov es:2[bx],al ; / mov colr,magenta+hi ; set hilighted magenta pop ax ; get the number again mov bx,960H ; address of decimal readout call todec ; show it in decimal mov bx,0A00h ; address of note readout call tonote ; show it as CM scale mov curonf,1 ; don't restore cursor call curon ; turn it back on jmp workx ; exit ;============================================================== ; have been dragging a module around, now want to do something with it ; work2a: call setcur ; set normal cursor again call curoff ; and then turn it off work2b: cmp vpagen,0 ; now in page 0 ? jnz work2b1 ; no, continue jmp work3 ; yes, go get a new module work2b1:cmp cmdflg,1 ; was last command "create module"? jz work2c ; yes, go do it cmp cmdflg,2 ; no, was it "copy module"? jz work2b2 ; yes, go do it jmp work5 ; no, go do "reincarnate module" work2b2:jmp work4 ; go do "copy module" ;============================================================== ; Want to create a new module. Check that there is enough empty ; space on the screen, and if ok, draw the module. ; work2c: mov es,vpage ; pick up video page segment mov bx,curadr ; current cursor offset mov di,modchar ; point to module char source mov cx,[di] ; get the line count mov ax,0 ; clear register work2f: or al,es:1[bx] ; look to see that there is space or al,es:-1[bx] ; / or al,es:3[bx] ; / add bx,160 ; / loop work2f ; / or al,al ; was there? jz work2g ; yes, branch call setmod ; no, continue dragging the module around jmp workx ; back to work ;-------------------------------------------------------------- ; There is enough space on the screen, show the module ; work2g: mov cmdflg,0 ; clear the command flag mov cx,[di] ; get module line count again add di,4 ; point to 1st char mov bx,curadr ; cursor address dec bx ; shift for module dec bx ; / call shomod$ ; show the module mov bx,curadr ; cursor address mov ax,last ; get priority showp ; show priority ;-------------------------------------------------------------- ; set up exetbl enteries, variable space, and pointers thereto ; mov bx,offset dgroup:_exetbl; calc addr of last module mov ax,last ; / add ax,ax ; / add ax,ax ; / add bx,ax ; / mov di,cmdptr ; get address of modsrc table mov ax,[di] ; get module exe addr mov [bx],ax ; put it in exetbl mov ax,varptr ; get end of variable table mov 2[bx],ax ; put it in exetbl mov ax,offset work ; get exe addr of work mov 4[bx],ax ; put it at the end of the exetbl mov ax,4[di] ; get variable allocation for module mov dx,ax ; (dx=variable allocation) add ax,ax ; *2 for word add ax,14 ; plus static allocation mov bx,varptr ; get current variable address add ax,bx ; ax = next one, bx = this one mov varptr,ax ; set varptr to new end of list ;-------------------------------------------------------------- ; build the variable list ; mov [bx],di ; first word is modsrc addr mov ax,last ; get priority mov 2[bx],ax ; second word is priority push bx ; save variable list pointer for later inc ax ; bump index and ax,maxmods ; limit to 512 active modules mov last,ax ; store it mov ax,vpage ; current display seg addr mov 4[bx],ax ; third word is vpage seg address mov ax,curadr ; current head of module text mov 6[bx],ax ; forth word is addr of module label mov word ptr 8[bx],0; fifth word is module output mov 10[bx],dx ; sixth word is variable alloc count add bx,12 ; point to start of variables mov cx,4[di] ; get number of variables allocated or cx,cx ; got at least one? jnz work2h ; yes, branch inc cx ; always make at least one work2h: mov word ptr [bx], offset dgroup:@zero; set variables to zero inc bx ; point to next inc bx ; / loop work2h ; loop til done mov bx,-2 ; find out the module number work2i: add bx,2 ; / cmp word ptr 6[bx+di],0; / jnz work2i ; bx = module number *2 mov ax,bx ; get actual number shr ax,1 ; / mov modnum,al ; save it for the other guys pop ax ; get variable list ptr from stack mov 6[bx+di],ax ; put it in modsrc mov di,2[di] ; get source text for the module ; mov bx,2[di] ; get page 0 address mov bx,cmdtag ; get page 0 address mov ax,0b800H ; page 0 segment mov es,ax ; set up seg reg for page 0 mov al,byte ptr es:2[bx]; get the current module number mov ah,al ; copy it inc ah ; bump cmp al,'$' ; system module? jnz work2j ; no, branch mov ah,'*' ; yes, show "in use" work2j: cmp ah,':' ; did it go from 9->10? jnz work2k ; no, branch mov ah,'A' ; yes, funky hex conversion work2k: cmp ah,'G' ; >16? jnz work2l ; no, branch mov ah,'*' ; yes, show "in use" work2l: mov byte ptr es:2[bx],ah; set new module number mov byte ptr 8[di],ah; set it in the source ;-------------------------------------------------------------- ; finish up by turning on the regular cursor, going back to work ; mov curonf,1 ; don't restore old cursor call curon ; normal cursor jmp workx ; back to the grind ;============================================================== ; command was "create", now another page 0 module is selected, ; zip pending command, kill module cursor ; work3: cmp cmdflg,2 ; stray move? jnz work3a ; no, branch jmp cancel ; yes, cancel the command work3a: mov cmdflg,0 ; zip pending command mov curonf,1 ; don't restore old cursor call curon ; drop module and exit jmp workx ; ...back to the work loop ;============================================================== ; Want to move an existing module. Check that there is enough empty ; space on the screen, and if ok, draw the module. ; work4: mov es,vpage ; pick up video page segment mov bx,curadr ; current cursor offset mov di,modchar ; point to module char source mov cx,[di] ; get the line count mov al,0 ; clear register work4a: test byte ptr es:1[bx],80h ; look to see that there is space jnz work4aa ; blinking counts as 0 or al,es:1[bx] ; / work4aa:test byte ptr es:-1[bx],80h; / jnz work4ab ; / or ax,es:-1[bx] ; / work4ab:test byte ptr es:3[bx],80h; / jnz work4ac ; / or ax,es:3[bx] ; / work4ac:add bx,160 ; / loop work4a ; / or al,al ; the final test jz work4b ; nothing there, branch to the move call setmod ; else continue dragging the module around jmp workx ; back to work ;-------------------------------------------------------------- ; There is enough space, erase the old module, ; then display it in its new location. ; First find old module's location page. ; work4b: mov di,tmpsav ; get varlist of source module mov es,4[di] ; get seg of source module display mov bx,6[di] ; get offset of tag ;-------------------------------------------------------------- ; Now erase the old module. ; mov di,[di] ; di = modsrc(old_varlist) mov di,2[di] ; di = txtadr(modsrc(old_varlist)) mov cx,[di] ; cx = line count call eramod$ ; erase the old module ;-------------------------------------------------------------- ; Show the module in its new location ; mov cmdflg,0 ; clear the command flag mov di,modchar ; point to module char source mov cx,[di] ; get module line count again add di,4 ; point to 1st char mov bx,curadr ; cursor address dec bx ; shift for module dec bx ; / mov es,vpage ; get current screen seg addr call shomod$ ; show the module ;-------------------------------------------------------------- ; set new screen location in the variable list ; mov di,tmpsav ; get varlist of source module mov ax,vpage ; get current seg mov 4[di],ax ; put it in the list mov ax,curadr ; get cursor addr mov 6[di],ax ; in the list ;-------------------------------------------------------------- ; finish up by turning on the regular cursor, going back to work ; work4x: mov curonf,1 ; don't restore old cursor call curon ; normal cursor jmp workx ; back to the grind ;============================================================== ; Have been dragging a gost around, now it's time to reincarnate. ; Check that there is enough empty space on the screen. ; work5: mov es,vpage ; pick up video page segment mov bx,curadr ; current cursor offset mov di,modchar ; point to module char source mov cx,[di] ; get the line count mov ax,0 ; clear register work5a: or al,es:1[bx] ; look to see that there is space or al,es:-1[bx] ; / or al,es:3[bx] ; / add bx,160 ; / loop work5a ; / or al,al ; was there? jz work5b ; yes, branch call setmod ; no, continue dragging the module around jmp workx ; back to work ;-------------------------------------------------------------- ; There is enough space. Get a delete flag from MODSRC, ; Use it as a pointer to the variable list. ; work5b: mov di,tmpsav ; get last modsrc mov ax,38[di] ; get the bit flags call frombit ; convert to a number push ax ; save a copy for later mov bx,ax ; convert to an address offset add bx,bx ; / mov bx,6[bx+di] ; bx = address of the variable table call tobit ; mask out the reincarnated bit xor ax,-1 ; / and 38[di],ax ; / jnz work5c ; branch if there are more delete flags ;-------------------------------------------------------------- ; no more delete flags, fix 'X' ; push bx ; save variable table pointer mov bx,-2 ; find out the module number work5d: add bx,2 ; / cmp word ptr 6[bx+di],0; / jnz work5d ; bx = module number *2 shr bx,1 ; /2 mov al,'*' ; load cmp bl,16 ; last module? jz work5e ; yes, branch using '*' mov al,bl ; no, use the module number tohex ; convert to ascii hex work5e: mov bx,2[di] ; find text address mov bx,2[bx] ; bx = page0 screen offset mov dx,0b800h ; set page0 seg mov es,dx ; / cmp word ptr 36[di],-1; system module? jnz work5e0 ; no, branch mov al,'*' ; yes, use * instead of number work5e0:mov es:4[bx],al ; set the module number pop bx ; restore the variable table addr ;-------------------------------------------------------------- ; restore the original module number and priority number ; work5c: mov dx,2[bx] ; get priority number pop ax ; get the module number tohex ; convert to ascii hex push bx ; save the variable table addr mov bx,modchar ; point to $dummy cmp word ptr 36[di],-1; system module? jnz work5c0 ; no, branch mov al,'$' ; yes, use $ instead of number work5c0:mov 8[bx],al ; set the current module number mov ax,dx ; get lsb of priority number and ah,1 ; do ms byte xor ah,1 ; / add ah,0f8h ; / mov 10[bx],ah ; / tohex ; convert to ascii hex mov 12[bx],ah ; set the priority number mov 14[bx],al ; / pop bx ; restore variable table addr ;-------------------------------------------------------------- ; update the variable table ; mov ax,vpage ; get current seg addr mov 4[bx],ax ; put in seg slot of var table mov ax,curadr ; current cursor offset mov 6[bx],ax ; put in addr slot of var table mov cx,10[bx] ; get number of variables allocated or cx,cx ; don't do it if 0 variables jz work5f ; / push bx ; save variable pointer work5g: mov word ptr 12[bx], offset dgroup:@zero; set variables to zero inc bx ; point to next inc bx ; / loop work5g ; loop til done pop bx ; restore variable pointer work5f: mov word ptr 8[bx],0; set output to 0 ;-------------------------------------------------------------- ; reactivate by inserting the module exe addr in the exe table ; mov di,[bx] ; get modsrc addr mov di,[di] ; di = exe addr of module mov bx,2[bx] ; get priority add bx,bx ; *4 add bx,bx ; / add bx,offset dgroup:_exetbl;bx = addr position in exetbl mov [bx],di ; replace dummy with the real one ;-------------------------------------------------------------- ; Show the module in its new location ; mov cmdflg,0 ; clear the command flag mov di,modchar ; point to module char source mov cx,[di] ; get module line count again add di,4 ; point to 1st char mov bx,curadr ; cursor address dec bx ; shift for module dec bx ; / mov es,vpage ; get current screen seg addr call shomod$ ; show the module ;-------------------------------------------------------------- ; finish up by turning on the regular cursor, going back to work ; work5x: mov curonf,1 ; don't restore old cursor call curon ; normal cursor jmp workx ; back to the grind ;============================================================== ; Priority swap was pending, now do it. ; work6: call curoff ; turn cursor off mov bx,tmpsav ; get saved variable table mov es,4[bx] ; get seg of last screen mov bx,6[bx] ; get offset of last screen mov byte ptr es:161[bx],grey; turn off hilight mov byte ptr es:163[bx],grey; / ; mov di,tmpsav ; old variable table mov si,varnow ; new variable table mov ax,2[di] ; get old priority # mov dx,ax ; dx = old priority # xchg ax,2[si] ; swap with new mov 2[di],ax ; / ; add ax,ax ; convert to exetbl addr add ax,ax ; / add ax,offset dgroup:_exetbl; ax = new exetbl addr mov bx,ax ; bx = new exetbl addr mov ax,[bx] ; ax = new exe addr mov cx,2[bx] ; cx = new vartbl addr add dx,dx ; convert old # to exetbl addr add dx,dx ; / add dx,offset dgroup:_exetbl; dx = old exetbl addr mov bp,dx ; bp = old exetbl addr xchg ax,ds:[bp] ; swap exe addrs mov [bx],ax ; / xchg cx,ds:2[bp] ; swap vartbl addrs mov 2[bx],cx ; / ; mov es,4[si] ; get screen seg of new mov bx,6[si] ; get screen addr of new mov ax,2[si] ; get priority # showp ; show priority mov es,4[di] ; get screen seg of old mov bx,6[di] ; get screen addr of old mov ax,2[di] ; get priority # showp ; show priority ; mov cmdflg,0 ; clear the command mov curonf,1 ; don't restore call curon ; normal cursor jmp workx ; back to the work loop ;============================================================== ; Delete Module was pending, now it's time to do it. ; workpa: cmp vpage,0 ; page 0 ? jnz workpa0 ; no, branch jmp workpz ; yes, exit ; workpa0:test cmdcol,80H ; valid color jnz workpz ; no, exit ; mov bx,5a0h ; offset for DEL call turnoff ; turn off highlight call curoff ; turn off cursor ; mov di,cmdptr ; find out which module # mov bx,0 ; counter offset mov ax,varnow ; get current variable list workpb: cmp 6[di+bx],ax ; look for a match jz workpc ; branch if found add bx,2 ; else bump index cmp bx,32 ; split if not found jz workpx ; / jmp short workpb ; loop ; ; bx = module # *2 workpc: mov al,bl ; al = module # *2 shr al,1 ; al = module # call tobit ; ax = bit pattern or 38[di],ax ; flag module as deleted mov di,varnow ; get variable list mov bx,2[di] ; get priority add bx,bx ; *4 add bx,bx ; / add bx,offset dgroup:_exetbl; point to position in exetable mov word ptr [bx],offset _dummy ; insert dummy ; ; set up to erase the module from screen mov es,4[di] ; get seg of module display mov bx,6[di] ; get offset of tag ; mov word ptr 4[di],0b000H; set illegal display seg mov word ptr 6[di],-1; set illegal display offset ; mov di,[di] ; di = modsrc(varlist) mov di,2[di] ; di = txtadr(modsrc(varlist)) mov cx,[di] ; cx = line count call eramod$ ; erase the old module ; ; mark source as erased mov di,cmdptr ; get source text mov di,2[di] ; di = txtadr(modsrc(cmdptr))) mov bx,2[di] ; bx = screen address of source text mov ax,0b800h ; set page0 seg mov es,ax ; / mov byte ptr es:4[bx],'X' ; mark source as deleted ; ; finish up and exit workpx: mov curonf,1 ; don't restore under cursor call curon ; cursor back on mov cmdflg,0 ; clear command flag workpz: jmp workx ; exit ;============================================================== ; End of WORK. If not HLT'd or module cursor, reset SI to the head ; of the module list, and run through the modules again. ; public workx workx: test midixsf,1 ; external sync input? jz workxa ; no, branch mov al,midixs ; yes, get xtrn sync cmp al,midiss ; same as before? jz workxx ; yes, back to loop mov midiss,al ; no, reset saved count mov tickis,al ; set alpha display jmp short workx2 ; go to work ; workxa: test asensf,-1 ; want active sensing? jz workxas ; no, branch test byte ptr ticks,7fh; time for active sensing? jnz workxas ; branch if not needed yet mov al,0feh ; send MIDI active sensing call allmidi ; / workxas:sendmb ; test fastflg,-1 ; fast flag set jnz workx4 ; yes, branch test byte ptr cs:timer,255; timer zeroed out? jz workx4 ; yes, branch test waiting,-1 ; have been waiting? jnz workxx ; yes, do housekeeping again mov waiting,1 ; no, set flag mov al,byte ptr cs:timer; get current timer value mov tickis,al ; save it workxx: sendmb ; send midi byte, if any jmp work ; go do housekeeping ; workx4: mov al,ticka ; get new timer value mov byte ptr cs:timer,al; put it in the timer test waiting,-1 ; was waiting? jnz workx2 ; yes, branch mov tickis,0 ; no, zip tick readout workx2: mov waiting,0 ; not waiting now ; workx0: cmp mmreset,0 ; want to reset measures? jnz workx5 ; no, branch mov mmcount,0 ; yes, reset measure count mov mmreset,0 ; clear flag on sync jmp short workx6 ; set new measure ; workx5: mov mmstart,0 ; flag not end of measure dec mmtick ; kick measure timer jnz workx3 ; branch if really not eom workx6: mov ax,mclocks ; else reload timer mov mmtick,ax ; / mov mmstart,1 ; flag start of measure inc mmcount ; bump measure count mov ax,mmcount ; else display measure count mov bx,vpage ; current video page mov es,bx ; / mov bx,160*13 ; address of decimal readout call toddec ; display ; workx3: ; test secondf,-1 ; new seconds count? jz workx9 ; no, branch mov secondf,0 ; yes, clear the flag mov ax,seconds ; display seconds count mov bx,vpage ; current video page mov es,bx ; / mov bx,160*14 ; address of decimal readout call toddec ; display ; workx9: test lodflg,-1 ; lodflg aready 0 jz workx9a ; yes, do nothing dec lodflg ; else dec the flag ; workx9a:test clrchf,2 ; channel cleared? jz workx7 ; no, branch mov clrchf,0 ; yes, clear flag ; workx7: cmp pdx,3 ; in menu area jnb workx7e ; no, branch cmp pdy,17 ; in mute area jb workx7e ; no, branch workx7e:mov bx,vpage ; get video page mov es,bx ; es = current video page mov bx,160*17 ; point to menu area inc bx ; point to highlight byte mov dx,mute ; get mute flags mov al,hi ; hi if not mute mov ah,lo ; lo if mute mov cx,8 ; 8 * 2 mute flags workx7l:ror dx,1 ; pop even flag jc workx7a ; branch if mute or es:[bx],al ; set hi if not mute jmp short workx7b ; branch workx7a:and es:[bx],ah ; set lo if mute workx7b:ror dx,1 ; pop odd flag jc workx7c ; branch if mute or es:4[bx],al ; set hi if not mute jmp short workx7d ; branch workx7c:and es:4[bx],ah ; set lo if mute workx7d:add bx,160 ; next line loop workx7l ; do 8 pairs ; test midisf,1 ; midi sync flag on? jz workx8a ; no, branch mov al,0f8h ; yes, send one mov midip,0 ; ... only to port 0 call tomidi ; / ; workx8a:inc cs:loops ; inc loop counter mov si,offset dgroup:_exetbl; point to start of table mov di,2[si] ; set di pointing to variable list jmp [si] ; go for it ;-------------------------------------------------------------- ; cleanup & exit public split split: call curoff ; turn pd cursor off split1: mov dx,seg dgroup ; set up ds mov ds,dx ; / mov al,0 ; set vpage0 call page ; call cls ; clear screen mov ah,2 ; set cursor to top of screen mov dx,0 ; / mov bh,dh ; / int 10H ; / mov ah,1 ; turn dos cursor on mov ch,6 ; / mov cl,7 ; / int 10H ; / call stopt ; stop system timer call stopm ; stop mpu ints ; mov dx,byemsg ; get exit message or dx,dx ; anything there jz split2 ; no, branch mov ah,9 ; dos print string int 21h ; dos call split2: ; if withc ; if compiled with C pop di ; restore C regs pop si ; / pop bp ; / pop es ; / ret ; back to C else ; if assembley ; mov ax,4c00h ; then do assembly exit int 21h ; split endif ;============================================================== ; routines used by WORK ;-------------------------------------------------------------- ; Return to di the varlist for the currently selected module. ; Assumes the current module tag address is in CMDTAG, and ; the current page address is in VPAGE. Error if DI = 0 on return. ; varlst: mov bp,offset dgroup:_exetbl ; point to start of table mov dx,vpage ; dx = current seg mov cx,cmdtag ; cx = current module addr varlst0:mov di,0 ; err if 0 returned cmp word ptr ds:[bp],offset work; exit when list is exausted jz varlstx ; / mov di,ds:2[bp] ; get the variable list cmp 4[di],dx ; right seg? jnz varlst2 ; / cmp 6[di],cx ; right address? jz varlstx ; yes, exit varlst2:add bp,4 ; bump to next module jmp short varlst0 ; loop varlstx:ret ; exit with di=varlist addr ;-------------------------------------------------------------- ; look at color at the cursor (CURADR), if it is one of the ; command colors, set up CMDCOL, CMDCNT, CMDLOC, CMDTAG & CMDPTR, ; otherwise clear CMDCOL and exit with no further action. ; Normally, this routine will be called only if pdf = 1. ; cmdchk proc near mov es,vpage ; get screen segment mov bx,curadr ; get cursor offset mov dl,es:1[bx] ; get the color cmp dl,white ; compare against command color list jz cmdchk1 ; branch out if good cmp dl,grey ; / jz cmdchk1 ; / cmp dl,cyan ; / jz cmdchk1 ; / cmp dl,cyan OR hi ; / jz cmdchk1 ; / cmp dl,blue ; / jz cmdchk1 ; / cmp dl,green ; / jz cmdchk1 ; / cmp dl,magenta ; / jz cmdchk1 ; / or dl,80H ; not on list, flag ng color mov cmdcol,dl ; / ret ; exit cmdchk1:mov cmdcol,dl ; is good, set the color cmp dl,es:-1[bx] ; look left jnz cmdchk2 ; branch if not same color dec bx ; else bump address left dec bx ; / cmdchk2:mov cmdloc,bx ; save the location mov cmdcnt,0 ; default count is 0 cmp dl,blue ; check for blue or green jz cmdchk3 ; / cmp dl,green ; / jz cmdchk3 ; / cmp dl,magenta ; check for magenta jnz cmdchk3 ; no, go on cmp curadr,0f9ch ; test for lower left jnb cmdchk4 ; / cmp byte ptr es:5[bx],white ; left of top label? jnz cmdchk4 ; no, branch add bx,2 ; yes, bump to label jmp short cmdchk4 ; branch around count ; cmdchk3:mov dh,-1 ; blue or green needs count cmdchk5:inc dh ; dh = count sub bx,160 ; up one line cmp byte ptr es:1[bx],blue; look for blue or green jz cmdchk5 ; / cmp byte ptr es:1[bx],green;/ jz cmdchk5 ; look until color not blue or green cmp byte ptr es:1[bx],magenta jz cmdchk5 ; look until color not magenta mov cmdcnt,dh ; set the count mov bx,cmdloc ; restore bx cmdchk4:cmp byte ptr es:1[bx],white; look for white jz cmdchk6 ; exit loop when found sub bx,160 ; back one line jmp short cmdchk4 ; / cmdchk6:mov cmdtag,bx ; save the tag address mov al,byte ptr es:[bx] ; get the character mov ah,0 ; make it into an address add ax,ax ; / mov di,offset dgroup:_chrtbl; find the ptr for that char add di,ax ; / mov ax,[di] ; / mov cmdptr,ax ; / ret ; exit cmdchk endp ;-------------------------------------------------------------- ; use module text for cursor ; setmod proc near call curoff ; turn off regular cursor mov di,modchar ; get line size mov ax,[di] ; / add ax,ax ; convert to pixel addr add ax,ax ; / add ax,ax ; / mov dx,200 ; subtract from max sub dx,ax ; dx = maximum pdy for this char mov cx,0 ; 0 = minimum pdy mov ax,8 ; set min, max allowable pdy values int 33h ; / mov ax,7 ; set min, max allowable pdx values mov dx,631 ; maximum x mov cx,8 ; minimum x int 33h ; set it ; mov execur,offset modcur; do show-modules mov curflg,1 ; flag special cursor call curon ; continue ret setmod endp ;-------------------------------------------------------------- ; use module text for cursor ; setcur proc near call curoff ; stop pd interupts mov dx,199 ; maximum y mov cx,0 ; minimum y mov ax,8 ; set min, max allowable pdy values int 33h ; / mov ax,7 ; set min, max allowable pdx values mov dx,639 ; maximum x mov cx,0 ; minimum x int 33h ; set it ; mov execur,0 ; no special cursors mov curflg,0 ; / call curon ; continue ret setcur endp ;-------------------------------------------------------------- ; Turn on menu command highlight. ; call with cursor on, bx = menu text offset ; public turnon turnon: push bx ; save text addr call curoff ; zip cursor pop bx ; get text addr mov dx,0b800h ; do all 8 pages mov cx,8 ; / turnon1:mov es,dx ; set the page seg or byte ptr es:1[bx],8 ; make bright or byte ptr es:3[bx],8 ; / or byte ptr es:5[bx],8 ; / inc dh ; next page loop turnon1 ; loop til done mov curonf,1 ; don't restore jmp curon ; cursor normal ;-------------------------------------------------------------- ; Turn off menu command highlight. ; call with cursor on, bx = menu text offset ; public turnoff turnoff:push bx ; save text addr call curoff ; zip cursor pop bx ; get text addr mov dx,0b800h ; do all 8 pages mov cx,8 ; / turnoff1:mov es,dx ; set the page seg and byte ptr es:1[bx],0f7h ; make dark and byte ptr es:3[bx],0f7h ; / and byte ptr es:5[bx],0f7h ; / inc dh ; next page loop turnoff1 ; loop til done mov curonf,1 ; don't restore jmp curon ; keep it right ;-------------------------------------------------------------- ; convert binary in al to decimal in in screen location es:bx ; all registers preserved ; public todec todec: push dx ; save registers mov dl,al ; / push ax ; / push bx ; / push cx ; / add bx,4 ; start at ls digit mov cx,3 ; initialize counter todec1: cmp dl,0 ; if 0, do shortcut jnz todec0 ; / mov al,30H ; ascii bias if 0 jmp short todec2 ; / todec0: push cx ; save outer loop mov al,dl ; ax = numerator mov ah,0 ; / mov cl,10 ; divisor of 10 div cl ; divide mov dl,al ; get quotient mov al,ah ; get remainder add al,30h ; add ASCII bias pop cx ; get loop counter todec2: mov es:[bx],al ; put to the screen dec bx ; bump count address dec bx ; / loop todec1 ; do 3 digits mov al,valflg ; mouse input? or al,usrflg ; / jz todec3 ; no, branch mov al,colr ; yes, set color mov es:3[bx],al ; / mov es:5[bx],al ; / mov es:7[bx],al ; / todec3: pop cx ; restore registers pop bx ; / pop ax ; / pop dx ; / ret ; exit ;-------------------------------------------------------------- ; convert binary in ax to decimal in in screen location es:bx ; all registers preserved ; public toddec toddec: push dx ; save registers mov dx,ax ; / push ax ; / push bx ; / push cx ; / add bx,4 ; start at ls digit mov cx,3 ; initialize counter toddec1:mov ax,dx ; ax = numerator mov dx,0 ; clear upper half cmp ax,0 ; if 0, do shortcut jnz toddec0 ; / mov al,30H ; ascii bias if 0 jmp short toddec2 ; / toddec0:push cx ; save outer loop mov cx,10 ; divisor of 10 div cx ; divide xchg ax,dx ; get quotent add al,30h ; add ASCII bias pop cx ; get loop counter toddec2:mov es:[bx],al ; put to the screen mov byte ptr es:1[bx],grey dec bx ; bump count address dec bx ; / loop toddec1 ; do 3 digits pop cx ; restore registers pop bx ; / pop ax ; / pop dx ; / ret ; exit ;-------------------------------------------------------------- ; convert binary in al to CM scale in screen location es:bx ; all registers preserved ; public tonote tonote: push di ; save registers push ax ; / push cx ; / and al,127 ; 0-127 allowed mov ah,0 ; ax = midi key value mov cl,12 ; 12 notes per octave div cl ; al = octave, ah = scale mov cl,ah ; save remainder in cl tohex ; convert octave to ascii mov es:4[bx],al ; put to the screen mov ch,0 ; get address of note char add cx,cx ; / add cx,offset dgroup:cscale mov di,cx ; di = address of note char mov ax,[di] ; get the chars mov es:2[bx],al ; send to the screen mov es:[bx],ah ; / mov al,valflg ; mouse input? or al,usrflg ; / jz tonot0 ; no, branch mov al,colr ; yes, set color mov es:1[bx],al ; / mov es:3[bx],al ; / mov es:5[bx],al ; / tonot0: pop cx ; restore registers pop ax ; / pop di ; / ret ; exit ;-------------------------------------------------------------- ; convert binary in al to hex in ax ; no regs but ax used ; tohexx: rol al,1 rol al,1 rol al,1 rol al,1 mov ah,al and al,0FH daa add al,0F0H adc al,040H ; xchg al,ah rol al,1 rol al,1 rol al,1 rol al,1 and al,00FH daa add al,0F0H adc al,040H ret ;-------------------------------------------------------------- ; convert hex in al to binary in al ; only al is used ; fromhex:sub al,30H ; for 0-9 cmp al,9 ; if 0-9 jle fromhxx ; ... go and al,5fh ; for lower case sub al,7 ; adjust for A-F fromhxx:ret ;-------------------------------------------------------------- ; convert bit set in ax to nybble in al ; first bit seen is taken ; frombit:mov cl,0 stc frombi1:inc cl rcr ax,1 jnc frombi1 dec cl mov al,cl and ax,15 ret ;-------------------------------------------------------------- ; convert nybble in al to bit set in ax ; tobit: mov cl,al ; for shift mov ax,1 shl ax,cl ret ;-------------------------------------------------------------- ; convert al to upper case ; touc: cmp al,'a' ; below lower case chars jb toucx ; yes, branch cmp al,'z' ; above lower case chars ja toucx ; yes, branch and al,5fh ; mask out bit 5 toucx: ret ;-------------------------------------------------------------- ; Temp HLT set ; Set clrchf to send out channel module settings ; reset to 1st note in measure ; tmphlt: or mprstf,4 ; turn tmp hlt on ret ;-------------------------------------------------------------- ; Temp HLT clear ; Set HLT highlight according to HLT flag ; Set clrchf to send out channel module settings ; reset to 1st note in measure ; fixhlt: mov bx,6E0H ; text offset test mprstf,2 ; was previously halted? jnz fixhlt1 ; yes, turn on highlight call turnoff ; turn off highlight jmp clrhlt ; finish up fixhlt1: call turnon ; turn on highlight ; clrhlt: and mprstf,0FBH ; turn tmp hlt off mov clrchf,1 ; set for chanl module mov mmtick,1 ; reset to 1st note in measure ret ;-------------------------------------------------------------- ; find module text address on screen 0, and insert them into the ; module source table (_modtxt). Called once only, on startup. ; modloc: mov ax,0b800H ; set page 0 seg mov es,ax ; / mov di,0 ; start at offset 0 modlo1: inc di ; point to next screen location inc di ; / cmp di,4090 ; do all of screen 0 jnz modlo2 ; branch if not done ret ; else exit loop ; modlo2: mov bx,es:[di] ; get it cmp bh,white ; look for label color jnz modlo1 ; not interested if not label color cmp bl,'0' ; not interested if label number jz modlo1 ; / cmp bl,'$' ; not interested if system module jz modlo1 ; / ; mov bh,0 ; bx = label char (0-255) add bx,bx ; bx = _chrtbl offset add bx,offset dgroup:_chrtbl; add the _chrtbl base address mov bx,[bx] ; bx = _modsrc address for the label mov bx,2[bx] ; bx = _modtxt address for the label mov ax,di ; ax = screen address of the label dec ax ; drop back two for module address dec ax ; ax = module address mov 2[bx],ax ; insert module address into table jmp short modlo1 ; loop ;============================================================== ; DOS & BIOS Utilities ;-------------------------------------------------------------- ; print string ; call with DX = string addr, terminated with $ ; print$: push ds mov ax,cs mov ds,ax mov ah,9 int 21H pop ds ret ;-------------------------------------------------------------- ; clear current display screen ; cls0 can be called with bh=atrribute ; cls: mov bh,7 ; normal blank jmp short cls0 ; / clx: mov bh,0 ; blank w 0's cls0: mov al,0 ; blank entire page mov ah,7 ; scroll down bios call mov cx,0 ; start at 0,0 mov dx,184fH ; 24, 79 int 10H ; do bios thing ret ; exit ;-------------------------------------------------------------- ; set video page ; call with al = video page to be set ; cursor must be off! ; page: and ax,_numpg ; 0-7 for EGA, 0-3 for CGA push ax ; save it mov al,vpagep ; get previous page mov ah,160 ; convert to a screen address mul ah ; / mov bx,ax ; / mov es,vpage ; get seg of current page and byte ptr es:1[bx],0F7H; return to low yellow and byte ptr es:3[bx],0F7H; / mov al,vpagen ; get current page mov vpagep,al ; remember it pop ax ; get new page mov vpagen,al ; store it push ax ; save page number mov ah,5 ; bios call to change vpage int 10H ; / pop ax ; get page back mov bx,0b800H ; base page address add bh,al ; set new base page seg mov vpage,bx ; / mov al,vpagep ; get previous page number mov ah,160 ; convert to a screen address mul ah ; / mov bx,ax ; / mov es,vpage ; get seg of current page or byte ptr es:1[bx],8; highlight or byte ptr es:3[bx],8; / ret ; exit ;-------------------------------------------------------------- ; copy menus in all pages ; menus: mov dx,0b800H ; address of page0 mov di,offset dgroup:$menu ; point to the menu text mov bp,[di] ; get number of lines add di,4 ; point to start of text mov cx,_numpg ; 8/4 pages to do inc cx ; / menus1: push cx ; save outer count push di ; save orig index mov cx,bp ; get count of lines mov es,dx ; set target seg mov bx,0 ; screen offset is 0 menus2: mov ax,[di] ; get character mov es:[bx],ax ; put it to the screen mov ax,2[di] ; get 2nd of three mov es:2[bx],ax ; put it away mov ax,4[di] ; get third mov es:4[bx],ax ; put it away add di,6 ; bump indexes add bx,160 ; next line for video loop menus2 ; do all text lines mov al,dh ; get page # and al,byte ptr _numpg; 0-7 mov ah,160 ; convert to line number mul ah ; / mov bx,ax ; now it's an address or byte ptr es:5[bx],8; make it brite pop di ; get orig index back add dh,1 ; bump to next page pop cx ; get page count loop menus1 ; do all pages ret ; exit ;-------------------------------------------------------------- ; display modules names ; shoall: test usesf,1 ; want to use screen file? jz shoall0 ; no, then use internal data ; mov ah,3dh ; dos open file command mov al,0 ; read only mov dx,offset dgroup:_scrfn; point to file name int 21H ; open the file jc shoall0 ; internal data if no file ; push ax ; save file handle mov bx,ax ; set up file handle mov ah,3fh ; dos read file command push ds ; save data seg mov dx,vpage ; set page seg mov ds,dx ; / mov dx,0 ; page offset is 0 mov cx,4096 ; screen is 4K bytes int 21h ; read the file pop ds ; restore data seg jc errexit ; bomb if error ; pop bx ; get file handle mov ah,3eh ; dos close file int 21h ; close the file ret ; exit ; errexit:pop ax ; discard return address jmp split1 ; exit ; shoall0:cld ; direction forward mov ax,0b800h ; set up for block copy mov es,ax ; / mov si,offset dgroup:modscr mov di,0 ; / mov cx,2048 ;/ rep movsw ; move from vartbl to screen ret ; exit ;============================================================== ; save modules ; savmod: test _tmpfn,-1 ; want to do it? jnz savmodt ; yes, branch ret ; no, just return savmodt:mov dx,offset dgroup:_tmpfn; point to file name call savmods ; save the stuff test errflg,-1 ; was there an error jz savmodu ; no, go on mov ax,offset dgroup:_noundo; yes, give parting shot mov byemsg,ax ; / jmp split ; exit savmodu:ret ;-------------------------------------------------------------- ; save modules & sequencers ; call with dx pointing to filename ; savmods:mov ah,3ch ; dos create file command mov cx,0 ; regular file int 21H ; create the file call erropw ; check for disk error ; push ax ; save file handle mov bx,ax ; set up file handle mov ah,40h ; dos write file command mov dx,offset dgroup:_header; point to header mov cx,128 ; 128 byte header int 21h ; save it mov cx,128 ; 128 byte header call errwrt ; check for disk error ; pop bx ; get handle push bx ; save it again mov ah,40h ; dos write file command push ds ; save data seg mov dx,seg bufsp ; set small seq seg mov ds,dx ; / mov dx,0 ; page offset is 0 mov cx,4096 ; 16 seq's of 256 bytes each int 21h ; save them pop ds ; restore data seg mov cx,4096 ; 16 seq's of 256 bytes each call errwrt ; check for disk error ; pop bx ; get handle push bx ; save it again mov ah,40h ; dos write file command push ds ; save data seg mov dx,seg buffs ; set large seq seg mov ds,dx ; / mov dx,0 ; page offset is 0 mov cx,8000H ; save half at a time int 21h ; save first half pop ds ; restore data seg mov cx,8000H ; save half at a time call errwrt ; check for disk error pop bx ; get handle push bx ; save it again mov ah,40h ; dos write file command push ds ; save data seg mov dx,seg buffs ; set large seq seg mov ds,dx ; / mov dx,8000h ; page offset for 2nd half mov cx,8000H ; save half at a time int 21h ; save second half pop ds ; restore data seg mov cx,8000H ; save half at a time call errwrt ; check for disk error ; pop bx ; get handle push bx ; save it again mov ah,40h ; dos write file command push ds ; save data seg mov dx,seg bufpa ; set large seq seg mov ds,dx ; / mov dx,0 ; page offset is 0 mov cx,8000h ; save half at a time int 21h ; save first half pop ds ; restore data seg mov cx,8000h ; save half at a time call errwrt ; check for disk error pop bx ; get handle push bx ; save it again mov ah,40h ; dos write file command push ds ; save data seg mov dx,seg bufpa ; set large seq seg mov ds,dx ; / mov dx,8000h ; page offset for 2nd half mov cx,8000h ; save half at a time int 21h ; save second half pop ds ; restore data seg mov cx,8000h ; save half at a time call errwrt ; check for disk error ; pop bx ; get handle push bx ; save it again mov ah,40h ; dos write file command push ds ; save data seg mov dx,0bc00h ; set page 4 seg mov ds,dx ; / mov dx,0 ; page offset is 0 mov cx,4000H ; 4 screens of 4K bytes int 21h ; save the video screens pop ds ; restore data seg mov cx,4000H ; 4 screens of 4K bytes call errwrt ; check for disk error ; pop bx ; get handle push bx ; save it again mov ah,40h ; dos write file command push ds ; save data seg mov dx,0b800h ; set page 0 seg mov ds,dx ; / mov dx,0 ; page offset is 0 mov cx,4000H ; 4 screens of 4K bytes int 21h ; save the video screens pop ds ; restore data seg mov cx,4000H ; 4 screens of 4K bytes call errwrt ; check for disk error ; pop bx ; get handle push bx ; save it again mov ah,40h ; dos write file command mov dx,offset dgroup:valsav; point to values mov cx,valend-valsav; cx = bytes to save int 21h ; save the values mov cx,valend-valsav; cx = bytes to save call errwrt ; check for disk error ; pop bx ; get handle push bx ; save it again mov ah,40h ; dos write file command mov dx,offset dgroup:mvlsav; point to values mov cx,mvlnum ; cx = bytes to save int 21h ; save the values mov cx,mvlnum ; cx = bytes to save call errwrt ; check for disk error ; pop bx ; get handle push bx ; save it again mov ah,40h ; dos write file command mov dx,offset dgroup:_modsrc; point to module source table mov cx,offset dgroup:_chrtbl; calc number of bytes sub cx,dx ; cx = bytes in modsrc table push cx int 21h ; save the modsrc table pop cx call errwrt ; check for disk error ; pop bx ; get handle push bx ; save it again mov ah,40h ; dos write file command mov dx,offset dgroup:_exetbl; module exec table mov cx,2048 ; 512 modules @ 4 bytes each int 21h ; save the table mov cx,2048 ; 512 modules @ 4 bytes each call errwrt ; check for disk error ; pop bx ; get handle push bx ; save it again mov ah,40h ; dos write file command mov dx,offset dgroup:vartbl; variable table mov cx,varsiz ; var table int 21h ; save the table mov cx,varsiz ; var table call errwrt ; check for disk error ; pop bx ; get handle push bx ; save it again mov ah,40h ; dos write file command mov dx,offset dgroup:_modtxt; module text mov cx,offset dgroup:?modtxt; end of module text sub cx,dx ; cx = bytes in module text push cx int 21h ; save the table pop cx call errwrt ; check for disk error ; pop bx ; get file handle mov ah,3eh ; dos close file int 21h ; close the file call errclw ; check for disk error ret ; exit ;-------------------------------------------------------------- ; load modules from _tmpfn ; lodmod: test _tmpfn,-1 ; want to do it? jz lodmodq ; no, just return mov ah,3dh ; dos open file command mov al,0 ; read only mov dx,offset dgroup:_tmpfn; point to file name int 21H ; open the file call errundo ; check for undo error mov dl,_mpab ; get current mpab status push dx ; save on stack or _mpab,15 ; force all call lodmod0 ; do the rest pop dx ; get mpab status mov _mpab,dl ; restore lodmodq:ret ; exit ;-------------------------------------------------------------- ; load modules with filename already setup (as lodmod, above) ; lodmod0: push ax ; save file handle mov bx,ax ; set up file handle mov ah,3fh ; dos read file command mov dx,offset dgroup:_header; point to header mov cx,128 ; 128 byte header int 21h ; load it call erropr ; check for disk error ; cmp _header,version; right version? jnz lodmodz ; no, exit cmp _header+1,release; right release jz lodmod1 ; yes, go on lodmodz:test _mpab,1 ; want to load MODS jz lodmod1 ; no, then it's ok and _mpab,0feh ; zip the MOD bit call dompab ; show new mpab mov dx,offset dgroup:_errver; else give message call errmsg ; / ; lodmod1:test _mpab,8 ; want to do this? jz lodmod2 ; no, branch ; pop bx ; get handle push bx ; save it again mov ah,3fh ; dos read file command push ds ; save data seg mov dx,seg bufsp ; set small seq seg mov ds,dx ; / mov dx,0 ; page offset is 0 mov cx,4096 ; 16 seq's of 256 bytes each push cx ; save number of read bytes int 21h ; load them pop cx ; get number of read bytes pop ds ; restore data seg call errqrd ; check for disk error ; lodmod2:test _mpab,4 ; want to do this? jz lodmod3 ; no, branch pop bx ; yes, set file pointer push bx ; handle mov cx,0 ; ms word of pointer mov dx,4096+128 ; ls word of pointer mov al,0 ; offset from start of file mov ah,42H ; Move File Pointer int 21H ; dos call ; pop bx ; get handle push bx ; save it again mov ah,3fh ; dos read file command push ds ; save data seg mov dx,seg buffs ; set large seq seg mov ds,dx ; / mov dx,0 ; page offset is 0 mov cx,8000H ; load half at a time push cx ; save read bytes int 21h ; load first half pop cx ; restore read bytes pop ds ; restore data seg call errqrd ; check for disk error pop bx ; get handle push bx ; save it again mov ah,3fh ; dos read file command push ds ; save data seg mov dx,seg buffs ; set large seq seg mov ds,dx ; / mov dx,8000h ; page offset for 2nd half mov cx,8000H ; load half at a time push cx ; save read bytes int 21h ; load first half pop cx ; restore read bytes pop ds ; restore data seg call errqrd ; check for disk error ; lodmod3:test _mpab,2 ; want to do this? jz lodmod4 ; no, branch pop bx ; yes, set file pointer push bx ; handle mov cx,1 ; ms word of pointer mov dx,4096+128 ; ls word of pointer mov al,0 ; offset from start of file mov ah,42H ; Move File Pointer int 21H ; dos call ; pop bx ; get handle push bx ; save it again mov ah,3fh ; dos read file command push ds ; save data seg mov dx,seg bufpa ; set large seq seg mov ds,dx ; / mov dx,0 ; page offset is 0 mov cx,8000h ; load half at a time push cx ; save read bytes int 21h ; load first half pop cx ; restore read bytes pop ds ; restore data seg call errqrd ; check for disk error pop bx ; get handle push bx ; save it again mov ah,3fh ; dos read file command push ds ; save data seg mov dx,seg bufpa ; set large seq seg mov ds,dx ; / mov dx,8000h ; page offset for 2nd half mov cx,8000h ; load half at a time push cx ; save read bytes int 21h ; load first half pop cx ; restore read bytes pop ds ; restore data seg call errqrd ; check for disk error ; lodmod4:test _mpab,1 ; want to do this? jnz lodmod5 ; yes, branch jmp lodmodx ; no, just go to exit lodmod5:pop bx ; yes, set file pointer push bx ; handle mov cx,2 ; ms word of pointer mov dx,4096+128 ; ls word of pointer mov al,0 ; offset from start of file mov ah,42H ; Move File Pointer int 21H ; dos call ; pop bx ; get handle push bx ; save it again mov ah,3fh ; dos read file command push ds ; save data seg mov dx,0bc00h ; set page 4 seg mov ds,dx ; / mov dx,0 ; page offset is 0 mov cx,4000H ; 4 screens of 4K bytes push cx ; save read bytes int 21h ; load first half pop cx ; restore read bytes pop ds ; restore data seg call errxrd ; check for disk error ; pop bx ; get handle push bx ; save it again mov ah,3fh ; dos read file command push ds ; save data seg mov dx,0b800h ; set page 0 seg mov ds,dx ; / mov dx,0 ; page offset is 0 mov cx,4000H ; 8 screens of 4K bytes push cx ; save read bytes int 21h ; load first half pop cx ; restore read bytes pop ds ; restore data seg call errxrd ; check for disk error ; pop bx ; get handle push bx ; save it again mov ah,3fh ; dos read file command mov dx,offset dgroup:valsav; point to values mov cx,valend-valsav; cx = bytes to load push cx ; save read bytes int 21h ; load first half pop cx ; restore read bytes call errxrd ; check for disk error ; pop bx ; get handle push bx ; save it again mov ah,3fh ; dos read file command mov dx,offset dgroup:mvlsav; point to values mov cx,mvlnum ; cx = bytes to load push cx ; save read bytes int 21h ; load first half pop cx ; restore read bytes call errxrd ; check for disk error ; pop bx ; get handle push bx ; save it again mov ah,3fh ; dos read file command mov dx,offset dgroup:_modsrc; point to module source table mov cx,offset dgroup:_chrtbl; calc number of bytes sub cx,dx ; cx = bytes in modsrc table push cx ; save read bytes int 21h ; load first half pop cx ; restore read bytes call errxrd ; check for disk error ; pop bx ; get handle push bx ; save it again mov ah,3fh ; dos read file command mov dx,offset dgroup:_exetbl; module exec table mov cx,2048 ; 512 modules @ 4 bytes each push cx ; save read bytes int 21h ; load first half pop cx ; restore read bytes call errxrd ; check for disk error ; pop bx ; get handle push bx ; save it again mov ah,3fh ; dos read file command mov dx,offset dgroup:vartbl; variable table mov cx,varsiz ; var table push cx ; save read bytes int 21h ; load first half pop cx ; restore read bytes call errxrd ; check for disk error ; pop bx ; get handle push bx ; save it again mov ah,3fh ; dos read file command mov dx,offset dgroup:_modtxt; module text mov cx,offset dgroup:?modtxt; end of module text sub cx,dx ; cx = bytes in module text push cx ; save read bytes int 21h ; load first half pop cx ; restore read bytes call errxrd ; check for disk error ; lodmodx: pop bx ; get file handle mov ah,3eh ; dos close file int 21h ; close the file call errclr ; check for disk error ret ; exit ;-------------------------------------------------------------- ; delete temp file ; delmod: test _tmpfn,-1 ; want to do it jz delmodq ; no, just exit mov dx,offset dgroup:_tmpfn; delete the load file mov ah,41h ; dos delete function call int 21h ; / delmodq:ret ;============================================================== ; pointing device interface ;-------------------------------------------------------------- ; The following pointing device interface assumes an interrupt ; driven microsoft-compatable mouse. When a the mouse position ; changes, or a button is pushed, the interrupt routine sets ; the new x, y and flag, but does no other processing. ; The cursor update and other action is performed by the work ; loop, thus allowing multiple page usage, and control over when ; cursor updating should occur. ;-------------------------------------------------------------- ; initialize pointing device ; initpd: mov ax,0 ; test for mouse mov es,ax ; / mov bx,0cch ; es:bx = mouse inte vector cmp es:[bx],ax ; int vector = 0? jz pdng ; yes, exit mov ax,es:2[bx] ; no, get the vector addr mov bx,es:[bx] ; / mov es,ax ; es:bx = vector addr cmp byte ptr es:[bx],0cfh; pointing to return? jnz pdok ; no, go to it pdng: mov dx,offset nopd$ ; no mouse, print message call print$ ; / jmp split1 ; exit program pdok: mov ax,0 ; initialize int 33H ; mouse driver inte mov ah,1 ; turn dos cursor off mov ch,32 ; / mov cl,0 ; / int 10H ; / ret nopd$ db 'No Pointing Device$',cr,lf ;-------------------------------------------------------------- ; this routine is called only by interrupt, when ; the pd position or flag changes. ; pdupd proc far ; called by interrupt mov di,seg dgroup ; set local seg mov ds,di ; / ; test al,1EH ; button change? ; jz pdupd1 ; no, branch test al,14H ; button released jz pdupd2 ; no, branch or bl,80H ; set bit 7 hi pdupd2: mov al,pdf ; or with prev bit 7 and al,80H ; / or bl,al ; / mov pdf,bl ; store flags pdupd1: mov ax,dx ; convert pixel xy to char xy mov bx,cx ; / mov cl,3 ; / shr ax,cl ; / shr bx,cl ; / mov pdx,bl ; save in pdx, pdy mov pdy,al ; / ; vxyadr ; convert vx,vy to offst in bx mov ax,curadr ; get last cursor address mov curadr,bx ; save the new one mov es,vpage ; point to current video page test curflg,1 ; wanna do the normal cursor jnz pdupd3 ; no, branch xchg bx,ax ; get addr of old cursor mov dx,curdata ; get old cursor data mov es:[bx],dx ; restore xchg bx,ax ; get addr of new cursor mov dx,es:[bx] ; get new data mov curdata,dx ; save it mov dh,curcol ; get cursor color or dh,dh ; doing it? jz pdupd3 ; no, branch mov ch,pdf ; yes, get flag info mov cl,5 ; show it shl ch,cl ; / or dh,ch ; / pdupd4: mov es:[bx],dx ; display cursor ; pdupd3: mov cx,execur ; get cursor exe address or cx,cx ; only do if nz jz pdupdx ; / jmp cx ; / pdupdx: ret ; exit pdupd endp ;-------------------------------------------------------------- ; show cursor ; public curon curon proc near mov es,vpage ; point to current video page test curflg,1 ; special cursor? jz curon0 ; no, branch ; mov di,modchar ; get char table mov cx,[di] ; get number of lines add di,4 ; point to 1st char mov bx,curadr ; cursor address dec bx ; shift for module dec bx ; / call shomod$ ; show the module jmp short curon2 ; branch around regular stuff ; curon0: mov bx,curadr ; get last cursor address mov dx,curdata ; get cursor data test curonf,1 ; want to restore? jz curon1 ; no, branch mov curonf,0 ; yes, clear flag mov dx,es:[bx] ; use screen character mov curdata,dx ; / ; curon1: mov dh,curcol ; get cursor color or dh,dh ; doing it? jz curon2 ; no, branch mov ch,pdf ; yes, get flag info mov cl,5 ; show it shl ch,cl ; / or dh,ch ; / mov es:[bx],dx ; display cursor ; curon2: mov cx,1fh ; inte on any change mov ax,12 ; "set call mask" mov dx,cs ; seg of pd update routine mov es,dx ; / mov dx,offset pdupd ; address of pd update int 33H ; set the mask ret ; exit curon endp ;-------------------------------------------------------------- ; hide cursor ; turn off pd interrupts ; must be called upon program exit ; public curoff curoff proc near mov es,vpage ; point to current video page test curflg,1 ; special cursor? jz curoff0 ; no, branch ; mov di,modchar ; get char table mov cx,[di] ; get number of lines mov bx,curadr ; cursor address dec bx ; shift for module dec bx ; / call fixmod$ ; restore the screen ; mov bx,curadr ; save cursor push ds ; save data seg mov ax,seg buffv ; get back buffer seg mov ds,ax ; / mov ax,es:[bx] ; get current screen info mov [bx],ax ; put it in back buffer pop ds ; get data seg back mov curdata,ax ; update cursor data jmp short curoff1 ; jump around regular stuff ; curoff0:mov bx,curadr ; get last cursor address mov dx,curdata ; get cursor data mov es:[bx],dx ; display cursor ; curoff1:mov cx,0 ; mask intes mov ax,12 ; "set call mask" mov dx,cs ; seg of pd update routine mov es,dx ; / mov dx,offset pdupd ; address of pd update int 33H ; set the mask ret ; exit curoff endp ;============================================================== ; video display routines ;-------------------------------------------------------------- ; module cursor ; call with with ax= old curadr, bx:es=current curadr ; addr of character list is in modchar ; modcur proc far push bx ; save new curadr mov bx,ax ; get old curadr dec bx ; modules at vx-1 dec bx ; / mov di,modchar ; point to module char source mov cx,[di] ; get the line count push cx ; save for later add di,4 ; point to first char push di ; save for later call fixmod$ ; restore the old stuff pop di ; it's later pop cx ; get count pop bx ; get new curadr push bx ; save it again dec bx ; modules at vx-1 dec bx ; / call shomod$ ; show the modules pop bx ; get new curadr or byte ptr es:1[bx],18H ; cursor ret ; exit modcur endp ;-------------------------------------------------------------- ; draw modules to screen ; call with: di=module character array ; cx=count of module char lines ; es:bx=video page:offset of 1st char ; shomod$ proc near push bp ; save bp mov bp,ds ; bp = data seg mov dx,seg buffv ; dx = back buffer seg shomod1:mov ax,[di] ; get first char xchg ax,es:[bx] ; put it on the screen mov ds,dx ; set buffer seg mov ds:[bx],ax ; save the old one mov ds,bp ; restore data seg inc di ; point to next inc di ; / mov ax,[di] ; get 2nd character xchg ax,es:2[bx] ; put it on the screen mov ds,dx ; set buffer seg mov ds:2[bx],ax ; save the old one mov ds,bp ; restore data seg inc di ; point to next inc di ; / mov ax,[di] ; get 3rd char xchg ax,es:4[bx] ; put it on the screen mov ds,dx ; set buffer seg mov ds:4[bx],ax ; save the old one mov ds,bp ; restore data seg inc di ; point to next inc di ; / add bx,160 ; next line loop shomod1 ; do all of module pop bp ; restore bp ret shomod$ endp ;-------------------------------------------------------------- ; restore screen from modules previously drawn ; call with: di=module character array ; cx=count of module char lines ; es:bx=video page:offset of 1st char ; fixmod$ proc near push ds ; save data seg mov ax,seg buffv ; set ds to back buffer mov ds,ax ; / fixmod1:mov ax,ds:[bx] ; get the old char mov es:[bx],ax ; put it back on the screen mov ax,ds:2[bx] ; get the old char mov es:2[bx],ax ; put it back on the screen mov ax,ds:4[bx] ; get the old char mov es:4[bx],ax ; put it back on the screen add bx,160 ; next line loop fixmod1 ; do all of module pop ds ; restore data seg ret fixmod$ endp ;-------------------------------------------------------------- ; erase module from screen ; call with es:bx = module tag addr ; cx = count of char lines ; eramod$ proc near mov word ptr es:[bx],0 ; erase center char mov word ptr es:2[bx],0 ; erase right char mov word ptr es:-2[bx],0; erase left char add bx,160 ; next line loop eramod$ ; loop til done ret ; exit eramod$ endp ;-------------------------------------------------------------- ; fix blink bit for a blinking module ; call with es:bx = module tag addr ; cx = count of char lines ; unblink proc near and byte ptr es:1[bx],07fh ; fix center char and byte ptr es:3[bx],07fh ; fix right char and byte ptr es:-1[bx],07fh; fix left char add bx,160 ; next line loop unblink ; loop til done ret ; exit unblink endp ;============================================================== ; get file name, if any, from command line ; getfn proc near mov es,_bases ; es = base seg mov di,80h ; di = offset of cmd line mov si,offset dgroup:_savfn ; si = save file name buffer mov cl,es:[di] ; get the number of bytes cmp cl,9 ; 8 bytes maximum jbe getfn3 ; / mov cl,9 ; / getfn3: mov ch,0 ; / or cl,cl ; exit if no name given jnz getfna ; / clc ; cy clr means no name ret ; / getfna: inc di ; point to start of text getfn0: mov al,es:[di] ; get first char cmp al,' ' ; ignore spaces jz getfn1 ; / cmp al,'.' ; stop on dot or 0 jz getfn2 ; / cmp al,0 ; / jz getfn2 ; / mov [si],al ; put char in save file name buffer inc si ; bump fn pointer getfn1: inc di ; bump cmd line pointer loop getfn0 ; loop to max of input chars ; getfn2: mov byte ptr [si],'.' ; set up extension mov byte ptr 1[si],'M' ; / mov byte ptr 2[si],'B' ; / mov byte ptr 3[si],' ' ; / mov byte ptr 4[si],0 ; / stc ; cy set means fn given ret ; exit getfn endp ;-------------------------------------------------------------- ; show save file name on screen 0 showfn: mov dx,0b800h ; es = page 0 mov es,dx ; / mov di,0a46h ; di = char addr mov si,offset dgroup:_savfn ; si = temp file name buffer mov cx,8 ; 8 chars to do mov dl,0 ; flag for end of name showfn1:test dl,1 ; reached end of name? jnz showfn2 ; yes, branch mov al,[si] ; get the char call touc ; convert to upper case cmp al,'.' ; end of name jnz showfn3 ; no, branch mov dl,1 ; yes, set flag showfn2:mov al,' ' ; set char to blank showfn3:mov es:[di],al ; write the char inc di ; bump pointers inc di ; / inc si ; / loop showfn1 ; do 8 chars ret ;============================================================== ; get a string from the keyboard to _inbuf ; call with first byte of _inbuf set to max chars ; getkey: mov ah,1 ; turn dos cursor on mov ch,6 ; / mov cl,7 ; / int 10H ; / ; mov dx,offset dgroup:_inbuf mov ah,0ah ; dos read buffer line function int 21h ; / ; mov ah,1 ; turn dos cursor off mov ch,32 ; / mov cl,0 ; / int 10H ; / ; ret ;============================================================== ; read directory into the filename area ; getdir: call clrdir ; clear the directory area ; mov dx,offset dgroup:_dirfn; now read the name mov cx,0 ; attribute "normal" mov ah,4eh ; read first int 21h ; dos call jc getdirx ; exit if no match call dodir0 ; else print it ; mov cx,30 ; 30+first+room max getdir1:push cx ; save count mov ah,4fh ; read next int 21h ; dos call pop cx ; get count jc getdirx ; exit if no match push cx ; save count call dodir ; else print it pop cx ; get count loop getdir1 ; do until done or limit getdirx: ; mov ah,36h ; get free disk space mov dl,0 ; default drive int 21h ; dos call mul cx ; find out in bytes mul bx ; result in dx:ax mov ax,dx ; /65K mov cl,2 ; /4 = 256K/file shr ax,cl ; / push ax ; save result ; mov ax,0b800h ; set up video seg mov es,ax ; / mov ax,diradr ; current offset add ax,0612h ; ah=x mov bl,ah ; al=y, bl=x mov bh,0 ; / vxyadr ; bx = video page address mov colr,grey mov word ptr es:[bx],gry+'['; set up brackets mov word ptr es:8[bx],gry+']' add bx,2 ; pop ax ; get numb of files mov room,al ; save the room number mov ah,0 ; 50 MB is enough call toddec ; print them ; ret ; split ;-------------------------------------------------------------- ; read from _inbuf into the filename area ; do 4 names, then bump to next column ; call dodir0 to initialize, then call dodir ; dodir0: mov diradr,0 ; initialize address dodir: mov ax,0b800h ; set up video seg mov es,ax ; / mov ax,diradr ; current offset add ax,0612h ; ah=x mov bl,ah ; al=y, bl=x mov bh,0 ; / vxyadr ; bx = video page address mov di,9eh ; point to source push ds ; save local data seg mov ds,_bases ; get system data seg mov cx,8 ; 8 max to do dodir1: mov al,[di] ; get the char cmp al,'.' ; extension ? jz dodir2 mov es:[bx],al ; no, write the char inc bx ; bump pointers inc bx ; / inc di ; / loop dodir1 ; loop ; dodir2: pop ds ; get local ds back mov ax,diradr ; bump screen address inc al ; bump y test al,4 ; 3 max jz dodir3 ; branch if < 4 mov al,0 ; else reset y add ah,9 ; .. bump x dodir3: mov diradr,ax ; put it away ret ;-------------------------------------------------------------- ; clear the directory filename area ; clrdir: mov ax,0b800h ; set up video seg mov es,ax ; / mov di,0b4ch ; point to 1st char mov dl,4 ; 4 lines mov ax,yel ; set color clrdir0:mov bx,0 ; / mov cx,72 ; 72 words per line clrdir1:mov es:[bx+di],ax ; set the word inc bx ; bump inc bx ; / loop clrdir1 ; do the line add di,160 ; next line dec dl ; / jnz clrdir0 ; / ret ;============================================================== ; show the current path ; dopath: mov ah,19h ; get current disk drive int 21h ; dos call add al,'A' ; make it a letter mov _inbuf,al ; put it away mov byte ptr _inbuf+1,':' ; send colon & slash mov byte ptr _inbuf+2,'\' ; / ; mov ah,47H ; get current directory mov dl,0 ; 0 = default drive mov si,offset dgroup:_inbuf+3; put it in inbuf int 21h ; dos call jc dopathx ; exit if error ; mov ax,0b800h ; set up video seg mov es,ax ; / mov bx,58H+(16*160) ; offset for line mov ax,yel ; set color mov cx,35 ; words in line dopath1:mov es:[bx],ax ; set the word inc bx ; bump inc bx ; / loop dopath1 ; do the line ; mov bx,58H+(16*160) ; offset for line mov di,offset dgroup:_inbuf; dir text dopath2:mov al,[di] ; get the char or al,al ; end? jz dopathx ; yes, exit mov es:[bx],al ; no, output to screen inc di ; bump pointers inc bx ; / inc bx ; / jmp short dopath2 ; loop dopathx:ret ; exit ;============================================================== ; critical error handeling (trapped DOS int 24H ) ; cerror: push bx ; save cpu state push cx ; / push dx ; / push di ; / push si ; / push bp ; / push ds ; / push es ; / mov al,0 ; setup to ignore test ah,80h ; disk error ? jnz cerrorx ; no, exit push di ; save error cond ; mov dx,seg dgroup ; set up data seg mov ds,dx ; / ; mov dx,offset dgroup:_err_wp;write protect ermsg pop ax ; check for write protect or al,al ; write protect jz cerror1 ; yes, branch mov dx,offset dgroup:_err_dx; general ermsg cerror1:call errmsg ; do the message ; mov ah,al ; put result in ah mov al,0 ; ...to Ignore cmp ah,'I' ; wanna? jz cerrorx ; yes, go do it inc al ; ...to Retry cmp ah,'R' ; / jz cerrorx ; / ; call curoff ; this is serious call cls ; clear screen mov ah,2 ; set cursor to top of screen mov dx,0 ; / mov bh,dh ; / int 10H ; / mov ah,1 ; turn dos cursor on mov ch,6 ; / mov cl,7 ; / int 10H ; / call stopt ; stop system timer call stopm ; stop mpu ints mov al,2 ; Quit ; cerrorx:pop es ; restore cpu state pop ds ; / pop bp ; / pop si ; / pop di ; / pop dx ; / pop cx ; / pop bx ; / iret ;============================================================== ; Error message handler ; call with errormsg in dx ; returns with al = I, R, or Q ; errmsg: push dx ; save message addr mov vpagen,1 ; set page 1 as swap mov al,0 ; set page 0 active call page ; / ; mov ax,0b800h ; set up video seg mov es,ax ; / mov si,58H+(16*160) ; offset for line mov di,offset dgroup:_foo; scratch buffer mov bx,0 ; clear index mov cx,35 ; words in line errmsg0: mov ax,es:[bx+si] ; get the char mov [bx+di],ax ; save it inc bx ; bump inc bx ; / loop errmsg0 ; do the line ; mov ah,2 ; bios set cursor position mov bh,0 ; page 0 mov dx,102CH ; x,y of cursor int 10H ; do bios int ; pop dx ; get the message mov ah,9 ; print line int 21H ; dos call ; errmsg1:mov ah,8 ; get a key response int 21h ; dos call call touc ; convert to uppercase cmp al,'I' ; check for "I", "R", or "Q" jz errmsg2 ; ...and branch if ok cmp al,'E' ; / jz errmsg2 ; / cmp al,'R' ; / jz errmsg2 ; / cmp al,'Q' ; / jnz errmsg1 ; / errmsg2:push ax ; save result ; mov ax,0b800h ; set up video seg mov es,ax ; / mov si,58H+(16*160) ; offset for line mov di,offset dgroup:_foo; scratch buffer mov bx,0 ; clear index mov cx,35 ; words in line ; errmsg3: mov ax,[bx+di] ; get the char mov es:[bx+si],ax ; restore it inc bx ; bump inc bx ; / loop errmsg3 ; do the line ; mov ah,2 ; bios set cursor position mov bh,0 ; page 0 mov dx,102CH ; x,y of cursor int 10H ; do bios int ; pop ax ; return kbd input ret ; exit ;-------------------------------------------------------------- ; errwrt: check for error while writing ; call with cx = proper file size ; errwrt: jnc errwrt1 ; branch if no error or errflg,1 ; set flag mov errwrd,ax ; save message ret errwrt1:cmp ax,cx ; correct size jz errwrtx ; yes, exit or errflg,2 ; no, set flag errwrtx:ret ;-------------------------------------------------------------- ; check for error while opening write file ; erropw: mov errflg,0 ; clear error flag jnc erropwx ; exit if no error or errflg,4 ; set flag mov errwrd,ax ; save message erropwx:ret ;-------------------------------------------------------------- ; check for error while closing write file ; errclw: jnc errclwx ; exit if no error or errflg,8 ; set flag mov errwrd,ax ; save message errclwx:ret ;-------------------------------------------------------------- ; check for error while opening read file ; erropr: mov errflg,0 ; clear error flag jnc erroprx ; exit if no error or errflg,40H ; set flag mov errwrd,ax ; save message erroprx:ret ;-------------------------------------------------------------- ; check for error while closing read file ; errclr: jnc errclrx ; exit if no error or errflg,80h ; set flag mov errwrd,ax ; save message errclrx:ret ;-------------------------------------------------------------- ; errxrt: check for non fatal error while reading ; call with cx = proper file size ; errqrd: jnc errqrd1 ; exit if no error or errflg,10h ; set flag mov errwrd,ax ; save message ret errqrd1:cmp ax,cx ; correct size jz errqrdx ; yes, exit or errflg,20h ; no, set flag errqrdx:ret ;-------------------------------------------------------------- ; errxrt: check for fatal error while reading ; errxrd: jnc errxrd1 ; exit if no error errxrd0:mov ax,offset dgroup:_errmod; yes, give parting shot mov byemsg,ax ; / jmp split ; exit errxrd1:cmp ax,cx ; correct size jnz errxrd0 ; no, split ret ;-------------------------------------------------------------- ; errundo: check for undo open error ; errundo: jnc errundx ; exit if no error mov ax,offset dgroup:_opundo; yes, give parting shot mov byemsg,ax ; / jmp split ; exit errundx:ret ;============================================================== ; debugging routines if debug ;-------------------------------------------------------------- _DATA SEGMENT public show0,show1,show2,show3,showq show0 dw 0 ; debug show words show1 dw 1 ; show2 dw 2 ; show3 dw -1 ; showq dw 22 dup (0) dw 0 _DATA ENDS ;-------------------------------------------------------------- ; move 16 words, starting with ds:[bx] into show array ; all registers preserved ; showw proc near push es push ds push ax push bx push cx push di mov ax,seg dgroup mov ds,ax mov di,offset dgroup:showq mov cx,44 showwl: mov al,[bx] mov [di],al inc bx inc di loop showwl showw2: pop di pop cx pop bx pop ax pop ds pop es showw endp ;-------------------------------------------------------------- ; show 16 memory values starting with SHOW0 ; all registers preserved ; show proc near cmp word ptr vpage,0b800h; don't show 0 jnz showa ; / ret ; / showa: cmp word ptr vpage,0bf00h; don't show 7 jnz showb ; / ret ; / showb: push ax ; preserve all registers push bx ; push cx ; push dx ; push di ; push es ; push ds ; mov es,vpage ; seg of screen mov ax,seg dgroup ; seg of SHO0 mov ds,ax ; / mov di,offset dgroup:show0 ; address of show0 mov bx,152 ; addr of 76,0 mov cx,25 ; 25 words mov dh,yellow ; color showl: mov al,1[di] ; get hi byte tohex ; convert it to hex mov dl,ah ; get hi nybble mov es:[bx],dx ; send hi nybble mov dl,al ; get low nybble mov es:2[bx],dx ; send low nybble mov al,[di] ; get low byte tohex ; convert it to hex mov dl,ah ; get hi nybble mov es:4[bx],dx ; send hi nybble mov dl,al ; get low nybble mov es:6[bx],dx ; send low nybble add bx,160 ; move down add di,2 ; bump index loop showl ; do 24 bytes pop ds ; restore registers pop es pop di pop dx pop cx pop bx pop ax ret show endp endif ; end of debug routines ;============================================================== _TEXT ENDS ;============================================================== end _doit ; change to END if withc