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Assembly Source File | 1994-07-13 | 11.1 KB | 349 lines

; M7MM-1.ASM -- Morrow Multi-I/O overlay for MDM7xx 11/11/83 ; ; This overlay adapts the MDM7xx program to use a Morrow Mult-I/O board ; and an external modem. The Mult-I/O board supports several users at ; the same port address in a fashion similar to bank selecting main ; memory. This program includes an initialization routine to select ; the baud rate but does not change the user (group) number which is ; set to group 1. ; ; You could look at other overlay files to see how the GOODBYE and/or ; SETUPR areas are handled. You could then adapt one of those, if ap- ; propriate for your equipment in this overlay. Some examples: ; ; "DP" Datapoint 1560 overlay using 8251 I/O and CTC timers for ; setting baud rates ; "H8" Heath H89 overlay for 8250 I/O and programmable baud rates ; "HZ" Zenith 120 overlay for 2661B initialization and baud rates ; "XE" Xerox 820II overlay for Z80-SIO intialization, etc. ; ; Edit this file for your preferences then follow the "TO USE:" example ; shown below. ; ; TO USE: First edit this file filling in answers for your own ; equipment. Then assemble with ASM.COM or equivalent ; assembler. Then use DDT to overlay the the results ; of this program to the original .COM file: ; ; A>DDT MDM7xx.COM ; DDT VERS 2.2 ; NEXT PC ; 4300 0100 ; -IM7MM-1.HEX (note the "I" command) ; -R ("R" loads in the .HEX file) ; NEXT PC ; 4300 0000 ; -G0 (return to CP/M) ; A>SAVE 66 MDM7xx.COM (now have a modified .COM file) ; ; = = = = = = = = = = = = = = = = = = ; ; 11/11/83 - Renamed to M7MM-1.ASM, no changes - Irv Hoff ; 07/27/83 - Renamed to work with MDM712 - Irv Hoff ; 07/07/83 - Adapted for Morrow Multi-I/O - G. Smith ; 07/01/83 - Revised to work with MDM711 - Irv Hoff ; 07/01/83 - Revised to work with MDM710 - Irv Hoff ; 05/27/83 - Updated to work with MDM709 - Irv Hoff ; 05/15/83 - Revised to work with MDM708 - Irv Hoff ; 04/11/83 - Updated to work with MDM707 - Irv Hoff ; 04/04/83 - First version of this file - Irv Hoff ; ; = = = = = = = = = = = = = = = = = ; BELL: EQU 07H ;bell CR: EQU 0DH ;carriage return ESC: EQU 1BH ;escape LF: EQU 0AH ;linefeed TAB: EQU 09H ;tab BDOS: EQU 0005H ; YES: EQU 0FFH NO: EQU 0 ; ; ; Change the following information to match your equipment ; BASE: EQU 0F0H ;Base address for Mult-I/O board GROUP: EQU 1 ;Group selection code GRP$CTL: EQU BASE+7 ;Group selection port address DLL: EQU BASE ;ACE baud rate divisor (LSB) DLM: EQU BASE+1 ;ACE baud rate divisor (MSB) IER: EQU BASE+1 ;ACE interrupt enable register LCR: EQU BASE+3 ;ACE line control register LSR: EQU BASE+5 ;ACE line status register RBR: EQU BASE ;ACE receive buffer register THR: EQU BASE ;ACE transmit hold register DLAB: EQU 80H ;Divisor latch access bit THRE: EQU 20H ;MODSNDB DR: EQU 1 ;MODRCVB WLS0: EQU 1 ;Word length select bit 0 WLS1: EQU 2 ;word length select bit 1 STB: EQU 4 ;stop bit count (2 stops) IMASK: EQU 0 ;Interrupt mask -- disable all ; MODDCDB: EQU 4 ;CARRIER DETECT BIT MODDCDA: EQU 0 ;VALUE WHEN ACTIVE MODRCVB: EQU 1 ;BIT TO TEST FOR RECEIVE MODRCVR: EQU 1 ;VALUE WHEN READY MODSNDB: EQU 20H ;BIT TO TEST FOR SEND MODSNDR: EQU 20H ;VALUE WHEN READY ; ; ORG 100H ; ; ; Change the clock speed to suit your system ; DS 3 ;(for "JMP START" instruction) ; PMMIMODEM: DB NO ;yes=PMMI S-100 Modem 103H SMARTMODEM: DB NO ;yes=HAYES Smartmodem, no=non-PMMI 104H TOUCHPULSE: DB 'T' ;T=touch, P=pulse (Smartmodem-only) 105H CLOCK: DB 40 ;clock speed in MHz x10, 25.5 MHz max. 106H ;20=2 MHh, 37=3.68 MHz, 40=4 MHz, etc. MSPEED: DB 1 ;0=110 1=300 2=450 3=600 4=710 5=1200 107H ;6=2400 7=4800 8=9600 9=19200 default BYTDLY: DB 5 ;0=0 delay 1=10ms 5=50 ms - 9=90 ms 108H ;default time to send character in ter- ;minal mode file transfer for slow BBS. CRDLY: DB 5 ;0=0 delay 1=100 ms 5=500 ms - 9=900 ms 109H ;default time for extra wait after CRLF ;in terminal mode file transfer NOOFCOL: DB 5 ;number of DIR columns shown 10AH SETUPTST: DB NO ;yes=user-added Setup routine 10BH SCRNTEST: DB NO ;Cursor control routine 10CH ACKNAK: DB YES ;yes=resend a record after any non-ACK 10DH ;no=resend a record after a valid-NAK BAKUPBYTE: DB NO ;yes=change any file same name to .BAK 10EH CRCDFLT: DB YES ;yes=default to CRC checking 10FH TOGGLECRC: DB YES ;yes=allow toggling of CRC to Checksum 110H CONVBKSP: DB NO ;yes=convert backspace to rub 111H TOGGLEBK: DB YES ;yes=allow toggling of bksp to rub 112H ADDLF: DB NO ;no=no LF after CR to send file in 113H ;terminal mode (added by remote echo) TOGGLELF: DB YES ;yes=allow toggling of LF after CR 114H TRANLOGON: DB YES ;yes=allow transmission of logon 115H ;write logon sequence at location LOGON SAVCCP: DB NO ;no=do not save CCP 116H LOCONEXTCHR: DB NO ;yes=local command if EXTCHR precedes 117H ;no=external command if EXTCHR precedes TOGGLELOC: DB YES ;yes=allow toggling of LOCONEXTCHR 118H LSTTST: DB YES ;yes=printer available on printer port 119H XOFFTST: DB NO ;yes=checks for XOFF from remote while 11AH ;sending a file in terminal mode XONWAIT: DB NO ;yes=wait for XON after CR while 11BH ;sending a file in terminal mode TOGXOFF: DB YES ;yes=allow toggling of XOFF checking 11CH IGNORCTL: DB YES ;yes=CTL-chars above ^M not displayed 11DH EXTRA1: DB 0 ;for future expansion 11EH EXTRA2: DB 0 ;for future expansion 11FH BRKCHR: DB '@'-40H ;^@ = Send 300 ms. break tone 120H NOCONNCT: DB 'N'-40H ;^N = Disconnect from the phone line 121H LOGCHR: DB 'L'-40H ;^O = Send logon 122H LSTCHR: DB 'P'-40H ;^P = Toggle printer 123H UNSAVE: DB 'R'-40H ;^R = Close input text buffer 124H TRANCHR: DB 'T'-40H ;^T = Transmit file to remote 125H SAVECHR: DB 'Y'-40H ;^Y = Open input text buffer 126H EXTCHR: DB '^'-00H ; ^ = Send next character 127H ; ; DS 2 ; 128H ; ; IN$MODCTL1: CALL MOD$SEL ;in modem control port 12AH IN LSR RET ;..... ; ; DS 4 ; OUT$MODDATP: PUSH PSW ;out modem data port 134H CALL MOD$SEL POP PSW OUT THR RET ;..... ; ; DS 2 ; IN$MODDATP: CALL MOD$SEL ;in modem data port 13EH IN RBR RET ;..... ; ; DS 4 ; ANI$MODRCVB: ANI MODRCVB ! RET ;bit to test for receive ready 148H CPI$MODRCVR: CPI MODRCVR ! RET ;value of rcv. bit when ready 14BH ANI$MODSNDB: ANI MODSNDB ! RET ;bit to test for send ready 14EH CPI$MODSNDR: CPI MODSNDR ! RET ;value of send bit when ready 151H DS 6 ; 156H ; OUT$MODCTL1: RET ! NOP ! NOP ;out modem control port #2 15AH OUT$MODCTL2: RET ! NOP ! NOP ;out modem control port #1 15DH ; LOGONPTR: DW LOGON ;for user message. 160H DS 6 ; 162H JMP$GOODBYE: JMP GOODBYE ; 168H JMP$INITMOD: JMP INITMOD ;go to user written routine 16BH RET ! NOP ! NOP ;(by-passes PMMI routine) 16EH RET ! NOP ! NOP ;(by-passes PMMI routine) 171H RET ! NOP ! NOP ;(by-passes PMMI routine) 174H JMP$SETUPR: JMP SETUPR ; 177H JMP$SPCLMENU: JMP SPCLMENU ; 17AH JMP$SYSVER: JMP SYSVER ; 17DH JMP$BREAK: JMP SENDBRK ; 180H ; ; ; Do not change the following six lines. ; JMP$ILPRT: DS 3 ; 183H JMP$INBUF DS 3 ; 186H JMP$INLNCOMP: DS 3 ; 189H JMP$INMODEM DS 3 ; 18CH JMP$NXTSCRN: DS 3 ; 18FH JMP$TIMER DS 3 ; 192H ; ; ; Routine to clear to end of screen. If using CLREOS and CLRSCRN, set ; SCRNTEST to YES at 010AH (above). ; CLREOS: CALL JMP$ILPRT ; 195H DB 16,0,0,0,0 ;Vector MT code for CLREOS 198H RET ; 19DH ; CLRSCRN: CALL JMP$ILPRT ; 19EH DB 4,0,0,0,0 ;Vector MT code for CLRSCRN 1A1H RET ; 1A6H ; SYSVER: CALL JMP$ILPRT ; 1A7H DB 'Computer with Morrow MIO board -- User #1' DB CR,LF,0 RET ;..... ; ; ;----------------------------------------------------------------------- ; ; NOTE: You can change the SYSVER message to be longer or shorter. The ; end of your last routine should terminate by 0400H (601 bytes ; available after start of SYSVER) if using the Hayes Smartmodem ; or by address 0C00H (2659 bytes) otherwise. ; ;----------------------------------------------------------------------- ; ; You can put in a message at this location which can be called up with ; CTL-O if TRANLOGON has been set TRUE. You can use several lines if ; desired. End with a 0. ; LOGON: DB 'How are you today?',CR,LF,0 ;..... ; ; ; Add your own routine here to send a break tone to reset some time-share ; computers, if desired. ; SENDBRK: RET ;..... ; ; ; Add your own routine here to put DTR low and/or send a break tone. ; Check other routines such as MDM709DP.ASM which is using this feature. ; GOODBYE: RET ;..... ; ; ; You can use this area for any special initialization or setup you may ; wish to include. Each must stop with a RET. You can check the other ; available overlays for ideas how to write your own routines if that ; may be of some help. ; INITMOD: LXI D,BAUD$MSG ;Point to baud selection message MVI C,9 ;BDOS print string cmd CALL BDOS ;Use BDOS to print baud message LXI D,BAUD$BUF ;point to 1 char input buffer MVI C,10 ;BDOS cmd to fill buffer from CON: CALL BDOS LDA CHOICE ;Get the character from the buffer SUI 31H ;Subtract ASCII bias JC INITMOD ;Input must be > zero CPI 4 ;And less than 4 JNC INITMOD ;Now we have 0,1,2,or3 in 'A' Register. RLC ;Mult by 2 for table offset STA CHOICE ;save for later MVI A,GROUP ;select group (user) number OUT GRP$CTL MVI A,DLAB ;Set data latch access bit OUT LCR LDA CHOICE ;get back offset into baud table LXI H,INITBLE ;point to table base ADD L ;add offset MOV L,A MOV A,M ;get low order byte for baud rate OUT DLL INX H ;point to next table entry MOV A,M ;and send it to baud register OUT DLM MVI A,WLS0+WLS1+STB ;8 bit data word & 2 stop bits OUT LCR IN RBR ;clear flags MVI A,IMASK ;set interrupt status (all disabled) OUT IER RET ;..... ; ; SETUPR: RET ;..... ; ; MOD$SEL: MVI A,GROUP ;Group select code OUT GRP$CTL ;Group select register MVI A,WLS0+WLS1+STB ;make sure DLAB is clear OUT LCR RET ;..... ; ; ; If using the Hayes Smartmodem this is unavailable without a special ; change. ; SPCLMENU: RET ; ; BAUD$MSG: DB CR,LF,TAB,'SELECT BAUD RATE (MIO user 1)' DB CR,LF,TAB,TAB,'1. 300' DB CR,LF,TAB,TAB,'2. 1200' DB CR,LF,TAB,TAB,'3. 4800' DB CR,LF,TAB,TAB,'4. 9600','$' ; BAUD$BUF: DB 01,00 CHOICE: DB 00 ;..... ; ; ; The initialization table is nothing more than a list of bytes to ; be send to the baud rate registers, in the same order as the choices ; in the baud message above. Note the MSB,LSB order within each entry. ; INITBLE: DB 80H,01 ;300 baud divisor = 0180H DB 60H,0 ;1200 baud divisor = 0C0H DB 18H,0 ;4800 baud divisor = 018H DB 0CH,0 ;9600 baud divisor = 00CH ;..... ; ; ; NOTE: MUST TERMINATE PRIOR TO 0400H (with Smartmodem) ; 0C00H (without Smartmodem) ;..... ; END ;