; M7R4-1.ASM -- Tandy TRS-80 Mod 4 under Montezuma Micro's CP/M 2.2 ; overlay file for MDM716 -- 01/08/84 ; ; 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 Tandy Model 4 computer to the modem program. ; Much of the information contained here is not in the main file. ; ; Edit this file for your preferences then follow the "TO USE:" example ; shown below. ; ; Use the MDM716 "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 MDM716.COM ; DDT VERS 2.2 ; NEXT PC ; 4300 0100 ; -IM7R4-1.HEX (note the "I" command) ; -R ("R" loads in the .HEX file) ; NEXT PC ; 4300 0000 ; -G0 (return to CP/M) ; A>SAVE 69 MDM716.COM (now have a modified .COM file) ; ; = = = = = = = = = = = = = = = = = = ; ; 01/08/84 - Fixed to support all baud rates - Richard Press, M.D. ; 11/26/83 - Modified for the TRS80 Mod 4 - Steven J. Davidson, M.D. ; 08/27/83 - Renamed to work with MDM712 - Irv Hoff ; 07/25/83 - Adapted for TRS-80 (zero ORG CP/M) - Phil Becker ; 06/22/83 - Revised to work with MDM710 - Irv Hoff ; 05/25/83 - 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 ; YES: EQU 0FFH NO: EQU 0 ; ; PORT: EQU 0EAH ;TRS80 Mod 4 Modem Status Port MODCTL1: EQU PORT ;Modem status port MODCTL2: EQU PORT ;Modem control port MODDATP: EQU PORT+1 ;Modem data port MODDCDB: EQU 20H ;CARRIER DETECT BIT MODDCDA: EQU 20H ;VALUE WHEN ACTIVE BAUDRP: EQU PORT-1 ;Baud rate port MODRCVB: EQU 80H ;Recv. Ready Mask bit MODRCVR: EQU 80H ; -value when ready MODSNDB: EQU 40H ;XMIT. READY MASK bit MODSNDR: EQU 40H ; -value when ready ; ORG 100H ; DS 3 ;(for "JMP START" instruction) ; PMMIMODEM: DB NO ;yes=PMMI S-100 Modem 103H SMARTMODEM: DB NO ;yes=HAYES Smartmodem 104H TONEPULSE: DB 'T' ;T=tone, 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 3 ;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 3 ;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 a non-ACK 10DH ;no=resend a record only after NAK BAKKUPBYTE: 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 YES ;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 19H 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 phone line 121H LOGCHR: DB 'L'-40H ;^L = Send logon 122H LSTCHR: DB 'P'-40H ;^P = Toggle printer 123H UNSAVE: DB 'T'-40H ;^R = Close input text buffer 124H TRANCHR: DB 'Y'-40H ;^T = Transmit file to remote 125H SAVECHR: DB 'R'-40H ;^Y = Open input text buffer 126H EXTCHR: DB '@'-40H ;^@ = Send next character 127H ; ; DS 2 ; 128H ; IN$MODCTL1: IN MODCTL1 ;in modem control port 12AH PUSH B ANI 0DFH MOV B,A ;save status JMP CTLPT2 ;continue DS 1 ; OUT$MODDATP: OUT MODDATP ! RET ;out modem data port 134H ; ; ; CONTINUE STATUS READ ; CTLPT2: IN 0E8H ;READ CD PORT ANI 20H ;ISOLATE CD ORA B ;MERGE STATUS POP B RET ; IN$MODDATP: IN MODDATP ! RET ;in modem data port 13EH DS 7 ANI$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: OUT MODCTL1 ! RET ;out modem control port #2 15AH OUT$MODCTL2: OUT MODCTL2 ! RET ;out modem control port #1 15DH ; LOGONPTR: DW LOGON ;for user message. 160H DS 6 ; 162H JMP$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$TIMER: DS 3 ; 192H ; ; Clear sequences -- CLREOS is clear to end of screen, CLRSCRN is clear ; entire screen. Last entry must be 0. Any other 0's act as NOP's. ; CLREOS: CALL JMP$ILPRT ; 195H DB 019H,0,0,0,0 ; 198H RET ; 19DH ; CLRSCRN: CALL JMP$ILPRT ; 19EH DB 01AH,0,0,0,0 ; 1A1H RET ; 1A6H ; ; SYSVER: CALL JMP$ILPRT ; 1A7H DB '*** Version for Tandy TRS80 Mod 4 ***' DB '*** with Montezuma Micro CP/M 2.2 ***' 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 YES. You can put in several lines if ; desired. End with a 0. ; ; LOGON: DB 'Hello, This is a TRS80 Mod 4 computer',CR,LF,0 ; ;======================================================================= ; ; This routine allows a 300 ms. break tone to be sent to reset some ; time-share computers. ; SENDBRK: MVI A,0E8H ; 8 bit words, 1 stop bit, no parity, JMP GOODBYE1 ; DTR & RTS disabled, *BREAK bit SET* ; ;..... ; ; ; 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,0EBH ;SEND BREAK, TURN OFF DTR ; GOODBYE1: ; OUT MODCTL1 ;SEND TO STATUS PORT MVI B,3 ;DELAY ABOUT 300 MS. CALL JMP$TIMER MVI A,0ECH ;NORMAL SEND/RECEIVE WITH DTR OUT MODCTL1 ;SEND TO STATUS PORT RET ; ; ; TRS80 Mod 4 initialization -- sets CTC timer 0 for baudrate in/out. ; ; TRS80 Mod 4 specific equates for initialization. ; CTCCMD: EQU 0E8H ;Master Reset, UART cntrl. register CTC0: EQU 0E9H ;BR19411 Timer control Timer 0 (port A) IB300 EQU 55H ;Default 300 baud ; INITMOD: MVI A,1 ;Reset UART and enable it OUT CTCCMD ; MVI A,0ECH ;8 bits, no parity, 1 stop bit, enable DTR OUT MODCTL1 ; and RTS ; LSBD: MVI A,IB300 OUT CTC0 ; INITMOD1: MVI A,1 ;DEFAULT TRANSFER TIME TO 300 BAUD STA MSPEED RET ; ;..... ; ; SETUPR: LXI D,BAUDBUF ;POINT TO NEW INPUT BUFFER CALL JMP$ILPRT DB 'Input Baud Rate (300, 600, 1200, ' DB '4800, 9600, 19200): ',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$INLNCOMP DB '600',0 JNC OK600 CALL JMP$INLNCOMP DB '1200',0 JNC OK1200 CALL JMP$INLNCOMP DB '4800',0 JNC OK4800 CALL JMP$INLNCOMP DB '9600',0 JNC OK9600 CALL JMP$INLNCOMP DB '19200',0 JNC OK19200 CALL JMP$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 LHLD BD300 ;GET 300 BAUD PARAMETERS IN 'HL' JMP LOADBD ;GO LOAD THEM ; OK600: MVI A,3 LHLD BD600 JMP LOADBD ; OK1200: MVI A,5 LHLD BD1200 JMP LOADBD ; OK4800: MVI A,7 LHLD BD4800 JMP LOADBD ; OK9600: MVI A,8 LHLD BD9600 JMP LOADBD ; OK19200: MVI A,9 LHLD BD19200 ;FALL THRU..... ; LOADBD: STA INITMOD1+1 ;CHANGE TIME-TO-SEND TO MATCH BAUDRATE MOV A,L ;GET BAUDRATE BYTE STA LSBD+1 ;STORE IN INITMOD JMP LSBD ;REINITIALIZE TO NEW BAUDRATE, THEN DONE RET ; ; ; TABLE OF BAUDRATE PARAMETERS ; BD300: DB 55H ; 300 BAUD BD600: DB 66H ; 600 BAUD BD1200: DB 77H ; 1200 BAUD BD4800: DB 0CCH ; 4800 BAUD BD9600: DB 0EEH ; 9600 BAUD BD19200: ; DB 0FFH ;19200 BAUD ; BAUDBUF: DB 10,0 DS 10 ; ; (END OF INITMOD AND SETUP ROUTINES) ;======================================================================= ; ; ; These routines can be used for your equipment, be sure to end with RET ; If using the Hayes Smartmodem this is unavailable without a special ; change. ; SPCLMENU: RET ; ;======================================================================= ; ; ; NOTE: MUST TERMINATE PRIOR TO 0400H (with Smartmodem) ; 0BC0H (without Smartmodem) ; END ;