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Assembly Source File | 1985-02-10 | 13.8 KB | 415 lines

; M7NE-2.ASM - NEC PC-8801 computer overlay file for MDM712 - 07/10/84 ; ; 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. ; This file adapts the NEC PC-8801 computer to the modem program. ; This file uses the INSTALL8 MODEM7B driver (incl. on this disk) linked ; to the TTY: device to obtain proper interrupt processing, necessary at ; higher Baud rates (>300). Changes cause more efficient operation at ; Baud rates of 300 and lower also. To use this overlay, you must set ; the serial port for 1200 baud (jumper 5), as the program then converts ; that to 300 baud whenever needed. ; ; If you edit this file for your preferences, follow the "TO USE:" example ; shown below. ; ; Use the "SET" command to change the baudrate when desired. It starts ; out at 300 baud when the program is first called up. ; ; 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 MDM727.COM ; DDT VERS 2.2 ; NEXT PC ; 4994 0100 ; -IM7NE-2.HEX (note the "I" command) ; -R ("R" loads in the .HEX file) ; NEXT PC ; 4994 0000 ; -G0 (return to CP/M) ; A>SAVE 73 NECMDM7.COM (now have a modified .COM file) ; ; = = = = = = = = = = = = = = = = = = ; ; 07/10/84 - Altered for Install8 MODEM7B.DRV drivers ; - Renamed to M7NE-2.ASM - Steven Sarna ; 11/11/83 - Renamed to M7NE-1.ASM, no changes - Irv Hoff ; 07/27/83 - Renamed for use with MDM712 - Irv Hoff ; 07/01/83 - Revised for use with MDM711 - Irv Hoff ; 06/22/83 - Revised for use with MDM710 - Irv Hoff ; 06/22/83 - Altered for use with MDM710 - Irv Hoff ; 06/22/83 - Altered MDM708DP for the NEC 8001 ; computer using an external modem - Irv Hoff ; ; = = = = = = = = = = = = = = = = = = ; BELL: EQU 07H ;bell CR: EQU 0DH ;carriage return ESC: EQU 1BH ;escape LF: EQU 0AH ;linefeed ; YES: EQU 0FFH NO: EQU 0 ; ; WBOOT: EQU 01H ;CP/M Warm boot location IOBYTE: EQU 03H ;CP/M I/O Byte location PORT: EQU 20H ;NEC PC-8801 serial port MODCTL1: EQU PORT+1 ;Modem status port MODCTL2: EQU PORT+1 ;Modem control port MODDATP: EQU PORT ;Modem data port MODRCVB: EQU 02H ;Modem recv bit MODRCVR: EQU 02H ;Modem recv ready bit MODSNDB: EQU 07H ;Modem send mask MODSNDR: EQU 05H ;Modem send ready bits ;8251 COMMAND INSTRUCTION FORMAT RES: EQU 0100$0000B ; Internal Reset (To mode instruction) RTS: EQU 0010$0000B ; Request to send ERR: EQU 0001$0000B ; Error Reset BRK: EQU 0000$1000B ; Send Break REN: EQU 0000$0100B ; Recieve Enable DTR: EQU 0000$0010B ; Data terminal ready TEN: EQU 0000$0001B ; Transmit Enable ;8251 MODE INTRUCTION FORMAT STOP1: EQU 0100$0000B ;Framing Control, 1 Stop bit STOP1$5: EQU 1000$0000B ;1 and 1/2 Stop bits STOP2: EQU 1100$0000B ;2 Stop bits NO: EQU 00$0000B ;No Parity ODD: EQU 01$0000B ;Odd parity EVN: EQU 11$0000B ;Even parity FIVE: EQU 0000B ;Five bit character length SIX: EQU 0100B ;Six bit character length SEVEN: EQU 1000B ;Seven bit character length EIGHT: EQU 1100B ;Eight bit character length X1: EQU 01B ;Asynchronous times one X16: EQU 10B ;Asynchronous times sixteen X64: EQU 11B ;Asynchronous times sixty-four ;BIOS ENTRY POINTS CONST: EQU 006H ;Console status CONIN: EQU 009H ;Console in CONOUT: EQU 00CH ;Console out LISTST: EQU 02DH ;List status ; ; ORG 100H ; DS 3 ;(for "JMP START" instruction) PMMIMODEM: DB NO ;yes=PMMI S-100 Modem 103H SMARTMODEM: DB YES ;yes=HAYES Smartmodem 104H TOUCHPULSE: DB 'T' ;T=touch, P=pulse (Smartmodem-only) 105H CLOCK: DB 5 ;clock speed in MHz x10, 25.5 MHz max. 106H ;20=2 MHh, 37=3.68 MHz, 40=4 MHz, etc. ;Due to interrupts on the PC-8801A, tick clock must be set to 5 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 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 YES ;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 NO ;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 NO ;no=printer not available (modem) 119H XOFFTST: DB NO ;yes=chcks 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 a 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 '^'-40H ;^^ = Send next character 127H ; ; DS 2 ; 128H ; IN$MODCTL1: IN MODCTL1 ;In modem control port 12AH RET ;left here for port I.D. ; ;not really used. DS 7 OUT$MODDATP: JMP TTYOUT ;Out modem data port 134H DS 7 ;replaced by TTY: output. IN$MODDATP: JMP TTYIN ;In modem data port 13EH DS 7 ;replaced by TTY: input. ANI$MODRCVB: RET ;Logical AND not performed. DS 2 CPI$MODRCVR: JMP TTY$IN$S ;Compare replaced by TTY: ; ;status routine. ANI$MODSNDB: RET ;Logical AND not performed. DS 2 CPI$MODSNDR: JMP TTY$OT$S ;Compare replaced by TTY: DS 12 ;status routine. ; 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 port) 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 ; ; ; Clear sequences -- CLREOS is clear to end of screen, CLRSCRN is clear ; entire screen. Last entry must be 0. Any other 0's act as NOP's. ; The SCRNTST option must be set "YES" for these to work. ; CLREOS: CALL JMP$ILPRT ; 195H DB ESC,59H,0,0,0 ; 198H RET ; 19DH ; CLRSCRN: CALL JMP$ILPRT ; 19EH DB 1EH,ESC,59H,0,0 ; 1A1H RET ; 1A6H ; ; SYSVER: CALL JMP$ILPRT ; 1A7H DB 'Version for NEC PC-8801A computers' DB CR,LF DB 'For use with "INSTALL8 MODEM7B TTY:"' DB CR,LF,0 RET ;..... ; ; ;----------------------------------------------------------------------- ; ; NOTE: You can change the SYSVER message to be longer or shorter. The ; end of your last routine should terminate by 0400H (601 bytes ; available after start of SYSVER) if using the Hayes Smartmodem ; or by address 0C00H (2659 bytes) otherwise. ; ;----------------------------------------------------------------------- ; ; You can put in a message at this location which can be called up with ; CTL-L if TRANLOGON has been set YES. You can put in several lines if ; desired. End with a 0. ; ; LOGON: DB 'This is an NEC PC-8801A computer',CR,LF,0 ;..... ; ; ;======================================================================= ; ; This routine allows a 300 ms. break tone to be send to reset some ; time-share computers. ; SENDBRK: MVI A,RTS+ERR+BRK+REN+DTR+TEN ;SEND A BREAK TONE JMP GOODBYE1 ;..... ; ; ; This routine sends a 300 ms. break tone and sets DTR low for the same ; length of time to disconnect some modems such as the Bell 212A, etc. ; GOODBYE: MVI A,ERR+BRK+TEN ;SEND BREAK, TURN OFF RTS & DTR ; GOODBYE1: OUT MODCTL1 ;SEND TO STATUS PORT MVI B,3 ;WAIT 300 MS. CALL JMP$TIMER MVI A,RTS+ERR+REN+DTR+TEN ;NORMAL SEND/RECEIVE WITH RTS & DTR OUT MODCTL1 ;SEND TO STATUS PORT RET ;..... ; ; ; NEC PC-8801 initialization -- sets the 8251A for 8 bits, 1 stop pulse, ; DTR high, requires jumper shunt be set (jumpered @ 5) to 1200 baud then ; divides by 64 for 300, or by 16 for 1200 baud via "SET" command. Set ; at present to default to 300 baud. ; INITMOD: MVI A,1 ;TRANSFER TIME FOR 300 BAUD STA MSPEED MVI A,0 ;INSURE OUT OF MODE OUT MODCTL1 ;MODEM STATUS PORT OUT MODCTL1 OUT MODCTL1 ;3 TIMES GETS IT TO KNOWN STATUS MVI A,RES ;INITIALIZE USART OUT MODCTL1 ;MODEM STATUS PORT ; INITMOD1: MVI A,STOP1+NO+EIGHT+X64 ;DEFAULT TO DIVIDE BY 64 FOR 300 BAUD OUT MODCTL1 ;MODEM STATUS PORT MVI A,RTS+ERR+REN+DTR+TEN ;RTS, DTR, RCV, XMT, ERROR RESET OUT MODCTL1 ;MODEM STATUS PORT RET ; ; NEC PC-8801 status subroutines. Alters IOBYTE to make TTY: give input ; and output status, and send TTY: input and output to CONsole ; CP/M device. ; Routines Modified to working condition by S. Michael Sarna ; Thanks to David Schmidt and Andrew Marrinson... R.I.P. June, 1984. ; TTY$IN$S: CALL SWAP ; Get the current I/O Byte and switch MVI C,CONST ; Get console status CALL BIOS ; Do the In status INR A ; Set the appropriate flag JMP EXIT1 ; Restore the old I/O Byte & leave TTY$OT$S: CALL SWAP ; Go to the correct I/O frame MVI C,LISTST ; BIOS offset to get the list device status CALL BIOS ; Do the Out status INR A ; Set the flag appropiately JMP EXIT1 ; Restore the old I/O Byte & leave TTYOUT: CALL SWAP ; One last I/O change MVI C,CONOUT ; BIOS console input CALL BIOS ; Send the character out ;The following delay is manditory to avoid an "undocumented hardware feature" ;in the 8251, as it seems you can't poll immediately after Xmt. LXI B,03FFH ; Wait a little bit after sending TTYOU1: DCX B ; Count down MOV A,B ; Check if counted down enough ORA C JNZ TTYOU1 ; If not zero, count down some more JMP EXIT1 TTYIN: CALL SWAP ; Turn into a TTY: system MVI C,CONIN ; Direct console read ; Exit must follow here: EXIT: CALL BIOS ; Do the suggested I/O EXIT1: POP B ; Restore regs to normal POP D POP H PUSH PSW ; Save the BIOS call status or data LDA IO$BYT ; Get the old I/O Byte STA IOBYTE ; move this to the I/O Byte location for CP/M POP PSW ; Return the status or data RET ; Go back to the caller BIOS: LHLD WBOOT ; Get the BIOS address MOV L,C ; Set LSB of BIOS Routine MOV C,A ; Set LSB of Arg PCHL ; Go to the BIOS SWAP: XTHL ; old HL on stack, return address in HL PUSH D ; Save other registers PUSH B PUSH H ; Return address back on stack LXI H,IOBYTE ; Point to the current I/O Byte PUSH PSW ; Save character to send MOV A,M ; Fetch the current I/O Byte MVI M,0 ; Set all devices to TTY: STA IO$BYT ; Save the current I/O Byte POP PSW ; Restore the character to send RET ; IO$BYT: DS 1 ; ; ; ; SETUPR: LXI D,BAUDBUF ;POINT TO NEW INPUT BUFFER CALL JMP$ILPRT DB 'Input Baud Rate (300, 1200): ',0 CALL JMP$INBUF LXI D,BAUDBUF+2 CALL JMP$INLNCOMP ;COMPARE BAUDBUF+2 WITH CHARACTERS BELOW DB '300',0 JNC OK300 ;GO IF GOT MATCH CALL JMP$INLNCOMP DB '1200',0 JNC OK1200 CALL JMP$ILPRT ;ALL MATCHES FAILED, TELL OPERATOR DB '++ Incorrect entry ++',CR,LF,BELL,0 JMP SETUPR ;TRY AGAIN ; OK300: MVI A,1 ;MSPEED 300 BAUD VALUE MVI B,STOP1+NO+EIGHT+X64 ;DIVIDE BY 64 FOR 300 BAUD JMP LOADBD ;GO LOAD THEM ; OK1200: MVI A,5 MVI B,STOP1+NO+EIGHT+X16 ;DIVIDE BY 16 FOR 1200 BAUD ; ; LOADBD: STA INITMOD+1 ;CHANGE TIME-TO-SEND TO MATCH BAUDRATE MOV A,B ;GET BAUDRATE BYTE STA INITMOD1+1 ;STORE IN INITMOD JMP INITMOD ;REINITIALIZE TO NEW BAUDRATE, THEN DONE ; ; BAUDBUF: DB 10,0 DS 10 ;..... ; ; ; (END OF INITMOD AND SETUP ROUTINES) ;======================================================================= ; ; ; These routines can be used for your equipment. End with RET. If ; using the Hayes Smartmodem this is unavailable without a special ad- ; dress change. ; SPCLMENU: RET ; ;======================================================================= ; ; ; NOTE: MUST TERMINATE PRIOR TO 0400H (with Smartmodem) ; 0C00H (without Smartmodem) ; END ;