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- ; M7PC-1.ASM -- Overlay for IBM PC With a Baby Blue Z80 CPU for MDM7xx.
- ; 11/11/83
- ;
- ; This overlay adapts the MDM7xx program to the IBM PC With a Baby Blue
- ; Z-80 CPU card.
- ;
- ; Some Z-80 code is used in this overlay to allow it to fit inside of
- ; 400H. (Start of dialing routines.) It is included by some EQU's at
- ; the beginning. DO NOT REMOVE THEM.
- ;
- ; You will want to look this file over carefully. There are a number of
- ; options that you can use to configure the program to suit your taste.
- ;
- ; The 'SET' command can be used to change the baud rate to a selected
- ; value. It comes up at 300 baud.
- ;
- ; 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>DEBUG DDT.COM
- ; -G
- ; DDT VERS 2.2
- ; -I MDM7xx.COM (Original version with bound header)
- ; -R
- ; NEXT PC
- ; 4300 0100
- ; -IM7PC-1.HEX (note the "I" command)
- ; -R ("R" loads in the .HEX file)
- ; NEXT PC
- ; 4300 0000
- ; -G0 (return to CP/M)
- ; Program terminated normally
- ; -RCS
- ; CS xxxx (present code seg. pointer)
- ; :1000 (segment address of Baby Blue memory)
- ; -RCS
- ; CX xxxx
- ; :4200 (size of program to be saved)
- ; -NMDM7xx.CPM (note extention .CPM not .COM)
- ; -W (write the file)
- ; Writing 4200 bytes
- ; -Q (exit from debug)
- ; A>BIND MDM7xx.CPM (bind on the header to all programs
- ; to run under CP/M)
- ;
- ; = = = = = = = = = = = = = = = = = =
- ;
- ; 11/11/83 - Renamed to M7PC-1.ASM, no changes - Irv Hoff
- ; 09/04/83 - Adapted to IBM PC With a Baby Blue Z80 CPU from
- ; MDM710OT.ASM (Otrona) - David Rounds
- ;
- ; = = = = = = = = = = = = = = = = =
- ;
- ;======================Z80 BRANCH EQUATES===============================
- ;
- ;
- BNC EQU 30H
- BZ EQU 28H
- BR EQU 18H
- BC EQU 38H
- BNZ EQU 20H
- ;
- ;;; EXAMPLE OF USE OF Z80 BRANCH INSTRUCTIONS
- ;;;
- ;;; ORG 100H
- ;;;
- ;;; NEXT: DB BR,START-NEXT-2 AND 0FFH ;branch to start:
- ;;; START: DB BR,NEXT-START-2 AND 0FFH ;branch to next:
- ;;;
- ;;; END 100H
- ;;;
- ;=======================================================================
- ;
- ;
- ;
- BELL: EQU 07H ;bell
- CR: EQU 0DH ;carriage return
- ESC: EQU 1BH ;escape
- LF: EQU 0AH ;linefeed
- CLS: EQU 1AH ;clear screen
- ;
- ;
- ; BDOS EQUATES
- ;
- BDOS: EQU 0005H
- WRCON: EQU 02H
- RDCON: EQU 01H
- PUNCH: EQU 04H
- ;
- ;
- ;
- YES: EQU 0FFH
- NO: EQU 0
- ;
- ;
- PORT EQU 03F8H
- MODCTL1 EQU PORT+3 ;line control register
- MODCTL2 EQU PORT+4 ;modem control register
- MODDATO EQU PORT ;data out port
- MODDATP EQU PORT ;data in port
- MODST1 EQU PORT+5 ;line status register
- MODST2 EQU PORT+6 ;modem status register
- ;
- MODRCVB EQU 01H
- MODRCVR EQU 01H
- MODSNDB EQU 20H
- MODSNDR EQU 20H
- ;
- ;
- ORG 100H
- ;
- ;
- ;
- 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 25 ;clock speed in MHz x10, 25.5 MHz max. 106H
- ;20=2 MHh, 37=3.68 MHz, 40=4 MHz, etc.
- MSPEED: DB 5 ;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 YES ;yes=user-added Setup routine 10BH
- SCRNTEST: DB YES ;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 YES ;yes=do not overwrite 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=allow toggling of printer on/off 119H
- ;
- ;
- ; Change the following to match the needs of the computer you will be
- ; to using terminal (T) (non-protocal)
- ;
- 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 ;^L = 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 'U'-40H ;^^ = Send next character 127H
- ;
- ;
- DS 2 ; 128H
- ;
- IN$MODST1: CALL XSTATUS ! RET ;read status port 1 12AH
- DS 6
- OUT$MODDATP: CALL XOUTPUT ! RET ;write to output 134H
- DS 6
- IN$MODDATP: CALL XINPUT ! RET ;read from input 13EH
- DS 6
- ANI$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 JMP CONTRL1 ;write to control port #1 15AH
- OUT$MODCTL2: JMP CONTRL2 ;write to control port #2 15DH
- ;
- LOGONPTR: DW LOGON ;for user message. 160H
- DS 6 ; 162H
- JMP$GOODBYE: JMP GOODBYE ; 168H
- JMP$INITMOD: JMP INITMOD ;go to user written routine 16BH
- ;
- RET ! NOP ! NOP ; bypass PMII routine 16EH
- RET ! NOP ! NOP ; bypass PMII routine 171H
- RET ! NOP ! NOP ; bypass PMII routine 174H
- ;
- JMP$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 ESC,'Y',0,0,0 ; 198H
- RET ; 19DH
- ;
- CLRSCRN: CALL JMP$ILPRT ; 19EH
- DB CLS,0,0,0,0 ; 1A1H
- RET ; 1A6H
-
- ;
- SYSVER: CALL JMP$ILPRT ; 1A7H
- DB CR,LF,'IBM PC With Baby Blue CP/M card'
- DB CR,LF,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 'Hello from an IBM-PC with Baby Blue CP/M Card'
- DB CR,LF,0
- ;.....
- ;
- ;
- ; IBM-PC AUX PORT CONTROL PORT OUTPUT ROUTINES
- ;
- CONTRL1: PUSH H
- PUSH D
- PUSH B
- MOV E,A
- LXI H,3FBH
- MVI C,0FEH
- CALL BDOS
- POP B
- POP D
- POP H
- RET
- ;.....
- ;
- ;
- CONTRL2: PUSH H
- PUSH D
- PUSH B
- MOV E,A
- LXI H,3FCH
- MVI C,0FEH
- CALL BDOS
- POP B
- POP D
- POP H
- RET
- ;.....
- ;
- ;
- XSTATUS: PUSH H
- PUSH D
- PUSH B
- LXI H,MODST1
- MVI C,0FFH
- CALL BDOS
- POP B
- POP D
- POP H
- RET
- ;.....
- ;
- ;
- XOUTPUT: PUSH H
- PUSH D
- PUSH B
- MOV E,A
- LXI H,MODDATP
- MVI C,0FEH
- CALL BDOS
- POP B
- POP D
- POP H
- RET
- ;.....
- ;
- ;
- XINPUT: PUSH H
- PUSH D
- PUSH B
- LXI H,MODDATP
- MVI C,0FFH
- CALL BDOS
- POP B
- POP D
- POP H
- RET
- ;.....
- ;
- ;
- ; This routine allows a 300 ms. break tone to be sent to reset some
- ; time-share computers.
- ;
- SENDBRK: MVI A,43H ;send a break tone
- CALL OUT$MODCTL1
- JMP GOODBYE1
- ;.....
- ;
- ;
- ; Set DTR low for 300 ms. to disconnect some modems
- ;
- GOODBYE: MVI A,0 ;turn off DTR
- CALL OUT$MODCTL2
- ;
- GOODBYE1: MVI B,3 ;wait for 300 ms.
- CALL JMP$TIMER
- MVI A,3 ;restore to normal, DTR on, 8 bits, etc.
- CALL OUT$MODCTL1
- MVI A,1
- CALL OUT$MODCTL2
- RET
- ;.....
- ;
- ;
- ; The following is the initialization routine for the IBM-PC with a Baby
- ; Blue Z-80 CPU:
- ;
- ;
- INITMOD: LXI H,BD1200 ;set initial baud rate to 1200 baud.
- JMP LOADBD
- ;.....
- ;
- ;
- ; Setup routine to allow changing modem speed with the set command.
- ;
- SETUPR: LDAX D ;get input buffer length
- INX D ;increment pointer past entered command
- INX D ;increment pointer past entered command
- INX D ;increment pointer past entered command
- INX D ;increment pointer past entered command
- INX D ;increment pointer past entered command
- CPI 3 ;length of "set" command
- JNZ SETUPX ;process entered speed
- LXI D,BAUDBUF ;point to new input buffer
- CALL JMP$ILPRT
- DB 'Input Baud Rate (110,300,600,1200,2400,'
- DB '4800,9600,19200): ',0
- CALL JMP$INBUF
- LXI D,BAUDBUF+2
- ;
- SETUPX: CALL GETPOINT ;get pointer in 'B'
- MOV A,B
- CPI 0FFH
- ;
- SET1: DB BNZ,SET2-SET1-2 AND 0FFH ;jmp if no error
- CALL JMP$ILPRT
- DB 'Bad Baud Rate Selection',CR,LF
- DB 'Present Speed Unchanged.',CR,LF,LF,0
- RET
- ;...
- ;
- ;
- SET2: LXI H,BD110 ;get starting address of table
- DAD B ;add offset
- DAD B ;...
- MOV A,C ;baud rate code
- STA MSPEED ;save it for reference
- ;
- LOADBD: PUSH H ;save pointer to divisor
- MVI A,80H ;set flag to access divisor register
- CALL OUT$MODCTL1
- POP H
- PUSH H
- MOV E,M
- LXI H,3F8H
- MVI C,0FEH
- CALL BDOS
- POP H
- INX H
- MOV E,M
- LXI H,3F9H
- MVI D,0FEH
- CALL BDOS
- MVI A,3 ;set communications parameters..
- CALL OUT$MODCTL1 ;..no parity, 8 bits
- MVI A,1
- CALL OUT$MODCTL2 ;enable dtr
- RET
- ;.....
- ;
- ;
- ; Subroutine to get baud table entry number in 'B'
- ;
- GETPOINT: LXI B,0 ;first entry=0
- CALL JMP$INLNCOMP ;compare BAUDBUF+2 with characters below
- DB '110',0
- RNC ;go if got match
- INX B ;first is entry 0
- CALL JMP$INLNCOMP
- DB '300',0
- RNC ;go if got match
- ;
- INX B
- CALL JMP$INLNCOMP
- DB '600',0
- RNC ;go if got match
- ;
- INX B
- CALL JMP$INLNCOMP
- DB '1200',0
- RNC ;go if got match
- ;
- INX B
- CALL JMP$INLNCOMP
- DB '2400',0
- RNC ;go if got match
- ;
- INX B
- CALL JMP$INLNCOMP
- DB '4800',0
- RNC ;go if got match
- ;
- INX B
- CALL JMP$INLNCOMP
- DB '9600',0
- RNC ;go if got match
- ;
- INX B
- CALL JMP$INLNCOMP
- DB '19200',0
- RNC ;go if got match
- ;
- MVI B,0FFH ;all matches failed
- RET
- ;....
- ;
- ;
- ; Table of baudrate divisors
- ;
- ;
- ;
- BD110: DW 1047
- BD300: DW 384
- BD600: DW 192
- BD1200: DW 96
- BD2400: DW 48
- BD4800: DW 24
- BD9600: DW 12
- BD19200: DW 6
- ;
- ;
- BAUDBUF: DB 10,0
- DS 10
- ;.......
- ;
- ;
- ; If using the Hayes Smartmodem this is unavailable without a special
- ; change.
- ;
- SPCLMENU: RET
- ;
- ;
- ; NOTE: MUST TERMINATE PRIOR TO 0400H (with Smartmodem)
- ; 0C00H (without Smartmodem)
- ;.....
- ;
- END