; 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 LNCOMP DB '300',0 RNC ;go if