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PLIDIO.ASM
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Assembly Source File
|
1982-12-31
|
26KB
|
619 lines
name 'DIOMOD'
title 'Direct CP/M Calls From PL/I-80'
;
;***********************************************************
;* *
;* cp/m calls from pl/i for direct i/o *
;* *
;***********************************************************
public memptr ;return pointer to base of free mem
public memsiz ;return size of memory in bytes
public memwds ;return size of memory in words
public dfcb0 ;return address of default fcb 0
public dfcb1 ;return address of default fcb 1
public dbuff ;return address of default buffer
public reboot ;system reboot (#0)
public rdcon ;read console character (#1)
public wrcon ;write console character(#2)
public rdrdr ;read reader character (#3)
public wrpun ;write punch character (#4)
public wrlst ;write list character (#5)
public coninp ;direct console input (#6a)
public conout ;direct console output (#6b)
public rdstat ;read console status (#6c)
public getio ;get io byte (#8)
public setio ;set i/o byte (#9)
public wrstr ;write string (#10)
public rdbuf ;read console buffer (#10)
public break ;get console status (#11)
public vers ;get version number (#12)
public reset ;reset disk system (#13)
public select ;select disk (#14)
public open ;open file (#15)
public close ;close file (#16)
public sear ;search for file (#17)
public searn ;search for next (#18)
public delete ;delete file (#19)
public rdseq ;read file sequential mode (#20)
public wrseq ;write file sequential mode (#21)
public make ;create file (#22)
public rename ;rename file (#23)
public logvec ;return login vector (#24)
public curdsk ;return current disk number (#25)
public setdma ;set DMA address (#26)
public allvec ;return address of alloc vector (#27)
public wpdisk ;write protect disk (#28)
public rovec ;return read/only vector (#29)
public filatt ;set file attributes (#30)
public getdpb ;get base of disk parm block (#31)
public getusr ;get user code (#32a)
public setusr ;set user code (#32b)
public rdran ;read random (#33)
public wrran ;write random (#34)
public filsiz ;random file size (#35)
public setrec ;set random record pos (#36)
public resdrv ;reset drive (#37)
public wrranz ;write random, zero fill (#40)
public sgscb ;set/get System Control Block byte/word
;
;
extrn ?begin ;beginning of free list
extrn ?boot ;system reboot entry point
extrn ?bdos ;bdos entry point
extrn ?dfcb0 ;default fcb 0
extrn ?dfcb1 ;default fcb 1
extrn ?dbuff ;default buffer
;
;***********************************************************
;* *
;* equates for interface to cp/m bdos *
;* *
;***********************************************************
cr equ 0dh ;carriage return
lf equ 0ah ;line feed
eof equ 1ah ;end of file
;
readc equ 1 ;read character from console
writc equ 2 ;write console character
rdrf equ 3 ;reader input
punf equ 4 ;punch output
listf equ 5 ;list output function
diof equ 6 ;direct i/o, version 2.0
getiof equ 7 ;get i/o byte
setiof equ 8 ;set i/o byte
printf equ 9 ;print string function
rdconf equ 10 ;read console buffer
statf equ 11 ;return console status
versf equ 12 ;get version number
resetf equ 13 ;system reset
seldf equ 14 ;select disk function
openf equ 15 ;open file function
closef equ 16 ;close file
serchf equ 17 ;search for file
serchn equ 18 ;search next
deletf equ 19 ;delete file
readf equ 20 ;read next record
writf equ 21 ;write next record
makef equ 22 ;make file
renamf equ 23 ;rename file
loginf equ 24 ;get login vector
cdiskf equ 25 ;get current disk number
setdmf equ 26 ;set dma function
getalf equ 27 ;get allocation base
wrprof equ 28 ;write protect disk
getrof equ 29 ;get r/o vector
setatf equ 30 ;set file attributes
getdpf equ 31 ;get disk parameter block
userf equ 32 ;set/get user code
rdranf equ 33 ;read random
wrranf equ 34 ;write random
filszf equ 35 ;compute file size
setrcf equ 36 ;set random record position
rsdrvf equ 37 ;reset drive function
wrrnzf equ 40 ;write random zero fill
scbf equ 49 ;set/get SCB
;
; utility functions
;***********************************************************
;* *
;* general purpose routines used upon entry *
;* *
;***********************************************************
;
getp1: ;get single byte parameter to register e
mov e,m ;low (addr)
inx h
mov d,m ;high(addr)
xchg ;hl = .char
mov e,m ;to register e
ret
;
getp2: ;get single word value to DE
getp2i: ;(equivalent to getp2)
call getp1
inx h
mov d,m ;get high byte as well
ret
;
getver: ;get cp/m or mp/m version number
push h ;save possible data adr
mvi c,versf
call ?bdos
pop h ;recall data addr
ret
;
chkv20: ;check for version 2.0 or greater
call getver
cpi 20
rnc ;return if > 2.0
; error message and stop
jmp vererr ;version error
;
chkv22: ;check for version 2.2 or greater
call getver
cpi 22h
rnc ;return if >= 2.2
vererr:
;version error, report and terminate
lxi d,vermsg
mvi c,printf
call ?bdos ;write message
jmp ?boot ;and reboot
vermsg: db cr,lf,'Later CP/M or MP/M Version Required$'
;
;***********************************************************
;* *
;***********************************************************
memptr: ;return pointer to base of free storage
lhld ?begin
ret
;
;***********************************************************
;* *
;***********************************************************
memsiz: ;return size of free memory in bytes
lhld ?bdos+1 ;base of bdos
xchg ;de = .bdos
lhld ?begin ;beginning of free storage
mov a,e ;low(.bdos)
sub l ;-low(begin)
mov l,a ;back to l
mov a,d ;high(.bdos)
sbb h
mov h,a ;hl = mem size remaining
ret
;
;***********************************************************
;* *
;***********************************************************
memwds: ;return size of free memory in words
call memsiz ;hl = size in bytes
mov a,h ;high(size)
ora a ;cy = 0
rar ;cy = ls bit
mov h,a ;back to h
mov a,l ;low(size)
rar ;include ls bit
mov l,a ;back to l
ret ;with wds in hl
;
;***********************************************************
;* *
;***********************************************************
dfcb0: ;return address of default fcb 0
lxi h,?dfcb0
ret
;
;***********************************************************
;* *
;***********************************************************
dfcb1: ;return address of default fcb 1
lxi h,?dfcb1
ret
;
;***********************************************************
;* *
;***********************************************************
dbuff: ;return address of default buffer
lxi h,?dbuff
ret
;
;***********************************************************
;* *
;***********************************************************
reboot: ;system reboot (#0)
jmp ?boot
;
;***********************************************************
;* *
;***********************************************************
rdcon: ;read console character (#1)
;return character value to stack
mvi c,readc
jmp chrin ;common code to read char
;
;***********************************************************
;* *
;***********************************************************
wrcon: ;write console character(#2)
;1->char(1)
mvi c,writc ;console write function
jmp chrout ;to write the character
;
;***********************************************************
;* *
;***********************************************************
rdrdr: ;read reader character (#3)
mvi c,rdrf ;reader function
chrin:
;common code for character input
call ?bdos ;value returned to A
pop h ;return address
push psw ;character to stack
inx sp ;delete flags
mvi a,1 ;character length is 1
pchl ;back to calling routine
;
;***********************************************************
;* *
;***********************************************************
wrpun: ;write punch character (#4)
;1->char(1)
mvi c,punf ;punch output function
jmp chrout ;common code to write chr
;
;***********************************************************
;* *
;***********************************************************
wrlst: ;write list character (#5)
;1->char(1)
mvi c,listf ;list output function
chrout:
;common code to write character
;1-> character to write
call getp1 ;output char to register e
jmp ?bdos ;to write and return
;
;***********************************************************
;* *
;***********************************************************
coninp: ;perform console input, char returned in stack
lxi h,chrstr ;return address
push h ;to stack for return
lhld ?boot+1 ;base of bios jmp vector
lxi d,2*3 ;offset to jmp conin
dad d
pchl ;return to chrstr
;
chrstr: ;create character string, length 1
pop h ;recall return address
push psw ;save character
inx sp ;delete psw
mvi a,1 ;string length is 1
pchl ;return to caller
;
;***********************************************************
;* *
;***********************************************************
conout: ;direct console output
;1->char(1)
call getp1 ;get parameter
mov c,e ;character to c
lhld ?boot+1 ;base of bios jmp
lxi d,3*3 ;console output offset
dad d ;hl = .jmp conout
pchl ;return through handler
;
;***********************************************************
;* *
;***********************************************************
rdstat: ;direct console status read
lxi h,rdsret ;read status return
push h ;return to rdsret
lhld ?boot+1 ;base of jmp vector
lxi d,1*3 ;offset to .jmp const
dad d ;hl = .jmp const
pchl
;
;***********************************************************
;* *
;***********************************************************
getio: ;get io byte (#8)
mvi c,getiof
jmp ?bdos ;value returned to A
;
;***********************************************************
;* *
;***********************************************************
setio: ;set i/o byte (#9)
;1->i/o byte
call getp1 ;new i/o byte to E
mvi c,setiof
jmp ?bdos ;return through bdos
;
;***********************************************************
;* *
;***********************************************************
wrstr: ;write string (#10)
;1->addr(string)
call getp2 ;get parameter value to DE
mvi c,printf ;print string function
jmp ?bdos ;return through bdos
;
;***********************************************************
;* *
;***********************************************************
rdbuf: ;read console buffer (#10)
;1->addr(buff)
call getp2i ;DE = .buff
mvi c,rdconf ;read console function
jmp ?bdos ;return through bdos
;
;***********************************************************
;* *
;***********************************************************
break: ;get console status (#11)
mvi c,statf
call ?bdos ;return through bdos
;
rdsret: ;return clean true value
ora a ;zero?
rz ;return if so
mvi a,0ffh ;clean true value
ret
;
;***********************************************************
;* *
;***********************************************************
vers: ;get version number (#12)
mvi c,versf
jmp ?bdos ;return through bdos
;
;***********************************************************
;* *
;***********************************************************
reset: ;reset disk system (#13)
mvi c,resetf
jmp ?bdos
;
;***********************************************************
;* *
;***********************************************************
select: ;select disk (#14)
;1->fixed(7) drive number
call getp1 ;disk number to E
mvi c,seldf
jmp ?bdos ;return through bdos
;***********************************************************
;* *
;***********************************************************
open: ;open file (#15)
;1-> addr(fcb)
call getp2i ;fcb address to de
mvi c,openf
jmp ?bdos ;return through bdos
;
;***********************************************************
;* *
;***********************************************************
close: ;close file (#16)
;1-> addr(fcb)
call getp2i ;.fcb to DE
mvi c,closef
jmp ?bdos ;return through bdos
;
;***********************************************************
;* *
;***********************************************************
sear: ;search for file (#17)
;1-> addr(fcb)
call getp2i ;.fcb to DE
mvi c,serchf
jmp ?bdos
;
;***********************************************************
;* *
;***********************************************************
searn: ;search for next (#18)
mvi c,serchn ;search next function
jmp ?bdos ;return through bdos
;
;***********************************************************
;* *
;***********************************************************
delete: ;delete file (#19)
;1-> addr(fcb)
call getp2i ;.fcb to DE
mvi c,deletf
jmp ?bdos ;return through bdos
;
;***********************************************************
;* *
;***********************************************************
rdseq: ;read file sequential mode (#20)
;1-> addr(fcb)
call getp2i ;.fcb to DE
mvi c,readf
jmp ?bdos ;return through bdos
;
;***********************************************************
;* *
;***********************************************************
wrseq: ;write file sequential mode (#21)
;1-> addr(fcb)
call getp2i ;.fcb to DE
mvi c,writf
jmp ?bdos ;return through bdos
;
;***********************************************************
;* *
;***********************************************************
make: ;create file (#22)
;1-> addr(fcb)
call getp2i ;.fcb to DE
mvi c,makef
jmp ?bdos ;return through bdos
;
;***********************************************************
;* *
;***********************************************************
rename: ;rename file (#23)
;1-> addr(fcb)
call getp2i ;.fcb to DE
mvi c,renamf
jmp ?bdos ;return through bdos
;
;***********************************************************
;* *
;***********************************************************
logvec: ;return login vector (#24)
mvi c,loginf
jmp ?bdos ;return through BDOS
;
;***********************************************************
;* *
;***********************************************************
curdsk: ;return current disk number (#25)
mvi c,cdiskf
jmp ?bdos ;return value in A
;
;***********************************************************
;* *
;***********************************************************
setdma: ;set DMA address (#26)
;1-> pointer (dma address)
call getp2 ;dma address to DE
mvi c,setdmf
jmp ?bdos ;return through bdos
;
;***********************************************************
;* *
;***********************************************************
allvec: ;return address of allocation vector (#27)
mvi c,getalf
jmp ?bdos ;return through bdos
;
;***********************************************************
;* *
;***********************************************************
wpdisk: ;write protect disk (#28)
call chkv20 ;must be 2.0 or greater
mvi c,wrprof
jmp ?bdos
;
;***********************************************************
;* *
;***********************************************************
rovec: ;return read/only vector (#29)
call chkv20 ;must be 2.0 or greater
mvi c,getrof
jmp ?bdos ;value returned in HL
;
;***********************************************************
;* *
;***********************************************************
filatt: ;set file attributes (#30)
;1-> addr(fcb)
call chkv20 ;must be 2.0 or greater
call getp2i ;.fcb to DE
mvi c,setatf
jmp ?bdos
;
;***********************************************************
;* *
;***********************************************************
getdpb: ;get base of current disk parm block (#31)
call chkv20 ;check for 2.0 or greater
mvi c,getdpf
jmp ?bdos ;addr returned in HL
;
;***********************************************************
;* *
;***********************************************************
getusr: ;get user code to register A
call chkv20 ;check for 2.0 or greater
mvi e,0ffh ;to get user code
mvi c,userf
jmp ?bdos
;
;***********************************************************
;* *
;***********************************************************
setusr: ;set user code
call chkv20 ;check for 2.0 or greater
call getp1 ;code to E
mvi c,userf
jmp ?bdos
;
;***********************************************************
;* *
;***********************************************************
rdran: ;read random (#33)
;1-> addr(fcb)
call chkv20 ;check for 2.0 or greater
call getp2i ;.fcb to DE
mvi c,rdranf
jmp ?bdos ;return through bdos
;
;***********************************************************
;* *
;***********************************************************
wrran: ;write random (#34)
;1-> addr(fcb)
call chkv20 ;check for 2.0 or greater
call getp2i ;.fcb to DE
mvi c,wrranf
jmp ?bdos ;return through bdos
;
;***********************************************************
;* *
;***********************************************************
filsiz: ;compute file size (#35)
call chkv20 ;must be 2.0 or greater
call getp2 ;.fcb to DE
mvi c,filszf
jmp ?bdos ;return through bdos
;
;***********************************************************
;* *
;***********************************************************
setrec: ;set random record position (#36)
call chkv20 ;must be 2.0 or greater
call getp2 ;.fcb to DE
mvi c,setrcf
jmp ?bdos ;return through bdos
;
;***********************************************************
;* *
;***********************************************************
resdrv: ;reset drive function (#37)
;1->drive vector - bit(16)
call chkv22 ;must be 2.2 or greater
call getp2 ;drive reset vector to DE
mvi c,rsdrvf
jmp ?bdos ;return through bdos
;
;***********************************************************
;* *
;***********************************************************
wrranz: ;write random, zero fill function
;1-> addr(fcb)
call chkv22 ;must be 2.2 or greater
call getp2i ;.fcb to DE
mvi c,wrrnzf
jmp ?bdos
;
;***********************************************************
;* *
;***********************************************************
sgscb: ;set/get SCB byte/word
;1-> addr(SCB structure)
call getp2
mvi c,scbf
jmp ?bdos
;
;***********************************************************
;* *
;***********************************************************
end