; I2TD-1.ASM - TurboDos 1.4x overlay file for IMP - 06/01/87 ; ; Uses the 8116 Baudrate generator ; ; This overlay file adapts TurboDos 1.4x to IMP244 and an external modem. ; ; Edit this file for your preferences then follow the "TO USE:" example ; shown below. ; ; Use the "SET" command to change the baudrate when desired. The value ; at MSPEED controls the baudrate 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 MLOAD to merge into the main file: ; ; MLOAD IMP.COM=IMP.COM,I2TD-x.HEX ; ; = = = = = = = = = = = = = = = = = = ; ; 06/01/87 Added 19200 bps, added BREAK routine, needs IMP245 to use ; v2 it. (It uses the 19200 bps.) - Irv Hoff ; ; 05/20/87 Initial version - Greg Davis, Sysop ; v1 Lewisville, TX RCP/M ; (214) 221-1956 ; ; = = = = = = = = = = = = = = = = = = ; ; YES EQU 0FFH NO EQU 0 ; ; ; TurboDos /// equates ; TDOS EQU 050H ; T-function entry CHNL EQU 0 ; Modem channel ( 0 or 1 ) ; ^-------; Change this to your channel number ; ;----------------------------------------------------------------------- ; ESC EQU 1BH ; Escape BELL EQU 'G'-40H ; ^G = Bell character LF EQU 'J'-40H ; ^J = Linefeed NEXTRY EQU 'K'-40H ; ^K = Try next phone number, abort this try CR EQU 'M'-40H ; ^M = Carriage return CLEARSC EQU 'Z'-40H ; ^Z = Clear screen, command mode only EOFCHAR EQU 'Z'-40H ; ^Z = End of file ; MDRCV EQU 1 ; Bit to test for receive MDSND EQU 0 ; Bit to test for send MDTXE EQU 0 ; Modem send buffer empty ; ;----------------------------------------------------------------------- ; ; ORG 0100H ; DS 3 ; Skip the data area below ; ; These routines and equates are at the beginning of the program so ; they can be patched by a monitor or overlay file without re-assembling ; the program. ; MSPEED: DB 5 ; 0=110 1=300 2=450 3=600 4=710 5=1200 103H ; 6=2400 7=4800 8=9600 9=19200 default HS2400: DB NO ; Yes=2400 bps highest speed 104H HS1200: DB YES ; Yes=1200 bps highest speed 105H RACAL: DB NO ; Yes=Racal-Vadic 1200V or 2400V or 2400PA 106H PROMODM: DB NO ; Yes=Prometheus ProModem 1200 bps 107H RESVD1: DB NO ; Reserved for special modems 108H RESVD2: DB NO ; Reserved for special modems 109H ; CLEAR: DB 1AH ; Clear screen character (ESC not needed) 10AH ; CLOCK: DB 40 ; Clock speed in MHz x10, 25.5 MHz max. 10BH ; 20=2 MHh, 37=3.68 MHz, 40=4 MHz, etc. ; 4 for Apple /// BYTDLY: DB 2 ; 0=0 delay 1=10ms 5=50 ms - 9=90 ms 10CH ; default time to send character in ter- ; minal mode file transfer for slow BBS CRDLY: DB 2 ; 0=0 delay 1=100 ms 5=500 ms - 9=900 ms 10DH ; default time for extra wait after CRLF ; in terminal mode file transfer NOFCOL: DB 5 ; Number of directory columns shown 10EH TCHPUL: DB 'T' ; T=tone, P=Pulse (Hayes 2400 modems) 10FH ; ADDLFD: DB NO ; Yes=add LF after CR to send file in terminal 110H ; mode (normally added by remote echo) CONVRUB: DB YES ; Yes=convert rub to backspace 111H CRCDFLT: DB YES ; Yes=default to CRC checking 112H IGNRCTL: DB YES ; Yes=CTL-chars above ^M not displayed 113H ; EXTCHR: DB '['-40H ; ESC = preceeds local control character 114H EXITCHR: DB 'E' ; Exit character 115H FILESND: DB 'F' ; Send file when in terminal mode 116H NOCONCT: DB 'N' ; Disconnect from phone line 117H LOGCHR: DB 'L' ; Send logon 118H LSTCHR: DB 'P' ; Toggle printer 119H UNSAVCH: DB 'R' ; Close input text buffer 11AH SAVECHR: DB 'Y' ; Open input text buffer 11BH CLEARS: DB 'Z' ; Clears screen, terminal mode 11CH SPARE1: DB 0 ; For future development 11DH NODTR: DB NO ; Yes if no DTR and need ATH0 to disconnect 11EH ; ; ; Handles in/out ports for data and status ; I$MDCTL1: JMP RCVCTL1 ; In modem control port 11FH DB 0,0,0,0,0,0,0 ; Spares if needed 122H ; I$MDTXE: JMP RCVCTL2 ; 129H DB 0,0,0,0,0,0,0 ; 12CH ; I$MDDATP: JMP RCVDATP ;in modem data port 133H DB 0,0,0,0,0,0,0 ; 146H ; O$MDDATP: JMP SNDDATP ; Out modem data port 13DH DB 0,0,0,0,0,0,0 ; Spares if needed 140H ; A$MDRCV: RET ; 147H DB 0,0 ; 148H ; C$MDRCV: CPI 0FFH ; TurboDos returns 0ffh 14AH RET ; if char available 14CH ; A$MDSND: ANI MDSND ; Always show ready to send 14DH RET ; 14FH ; C$MDSND: CPI MDSND ; 150H RET ; 152H ; A$MDTXE: ANI MDTXE ; 153H RET ; 155H ; C$MDTXE: CPI MDTXE ; 156H RET ; 158H ; ; ; Special exit vector, used by some computers to reset interrupt vectors ; J$EXITVEC:RET DB 0,0 ; ; ; Jump vectors needed by each overlay ; J$GOODBYE:JMP GOODBYE ; Disconnects modem by dropping DTR 15CH J$INITMOD:JMP INITMOD ; Initializes modem, autosets baudrate 15FH J$STUPR: JMP STUPR ; SET routine to change baudrate 162H J$SYSVR: JMP SYSVR ; Signon message 165H ; ; ; "AT" command strings, can be replaced in individual overlay if needed ; J$STRNGA: DS 3 ; 1200 bps "AT" string 168H J$STRNG1: DS 3 ; 2400 bps "AT" string 16BH ; ; ; Next fourteen lines should not be changed by user overlay as these go ; to specific locations in the main program, not in the overlay. ; J$CMDSPL: DS 3 ; Allows entry of baudrate on CMD line 16EH J$CRLF: DS 3 ; Turns up one new line on display 171H J$DIAL: DS 3 ; Start of dialing routine 174H J$DSCONT: DS 3 ; Terminates modem use 177H J$GOLST: DS 3 ; Printer routine, needed by Apple //e 17AH J$ILPRT: DS 3 ; Prints an inline string, 0 to end 17DH J$INBUF: DS 3 ; Stores a keybd string for comparison 180H J$INLNCP: DS 3 ; Inline "compare strings" routine 183H J$INMDM: DS 3 ; Max .1 sec wait for modem character 186H J$RCVRSP: DS 3 ; For 3801 I/O use (TV-803) 189H J$SNDCHR: DS 3 ; Sends a character to the modem 18CH J$SNDSTR: DS 3 ; Sends a string to the modem, $ to end 18FH J$TIMER: DS 3 ; .1 second timer (amount in 'B' reg.) 192H J$NEW1: DB 0,0,0 ; For future needs 195H J$NEW2: DB 0,0,0 ; For future needs 198H ; ; ; For 2400 bps auto-stepdown units ; MANUAL: DB 0 ; For manual selection flag 19BH J$300: JMP OK300 ; Sets baudrate to 300 baud 19CH J$1200: JMP OK1200 ; Sets baudrate to 1200 bps 19FH J$2400: JMP OK2400 ; Sets baudrate to 2400 bps 1A2H ; LOGPTR: DW LOGON ; Pointer to display LOGON message 1A5H ; SYSVR: CALL J$ILPRT ; Display the following line 1A7H DB 'TurboDos 1.41 Generic Version 1.0 ' ; 1AAH ; 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). ; ;----------------------------------------------------------------------- ; ; You can put in a message at this location which can be called up with ; (special character-L). You can put in several lines. End with a 0. ; LOGON: DB 'Hello, from a TurboDos /// user',CR,0 ; ;----------------------------------------------------------------------- ; This routine sets a 300 ms break tone. It changes the baudrate to ; 19200 bps then sends enough ASCII null characters to consume 300 ms. ; (A null character is all spacing except for the stop bit.) At high ; speed this effectively gives a steady break tone. When finished it ; restores the baudrate to the original speed. ; SENDBRK: LDA MSPEED ; Get current speed STA STRSPD ; Store for now CALL OK19200 ; Set output to 19200 bps LXI D,575 ; Will take 300 ms at 19,200 bps ; SEND1: XRA A ; ASCII null character CALL J$SNDCHR ; Sends a character to the modem DCX D ; One less to go JNZ SEND1 ; If not zero, do another ; LDA STRSPD ; Get original baudrate back JMP SPDCHK ; Go set speed to normal ; STRSPD: DB 0 ; Temporary 'store speed' byte ;..... ; ; ; This routine sets DTR low for 300 ms to disconnect the phone ; GOODBYE: MVI C,39 ; T-FCN 39 set modem control MVI D,CHNL ; Select current modem channel number MVI E,0 ; Turn off DTR CALL TDOS MVI B,2 ; Wait for 300 ms CALL J$TIMER MVI C,39 MVI D,CHNL ; Select current modem channel number MVI E,0C0H ; Reset DTR normal CALL TDOS ;..... ; ; INITMOD: MVI C,39 ; T-FCN 39 set modem control MVI D,CHNL ; Select current modem channel number MVI E,0C0H ; DTR normal CALL TDOS LDA MSPEED ; Get Baud Rate value ; SPDCHK: CPI 1 ; Is it 300 baud JZ OK300 CPI 5 ; Is it 1200 bps JZ OK1200 CPI 6 ; Is it 2400 bps JZ OK2400 CPI 7 ; Is it 4800 bps JZ OK4800 CPI 8 ; Is it 9600 bps JZ OK9600 CPI 9 ; Is it 19200 bps JZ OK19200 JMP STUPR1 ; If none of these, ask for new value ; ; ;----------------------------------------------------------------------- ; ; Use the 'SET' command to select a desired baud rate ; STUPR: CALL J$CMDSPL ; Gives us CMDBUF+6 JNC STUPR2 ; STUPR1: CALL J$ILPRT DB 'Input Baud Rate (300, 1200, 2400, ' DB '4800, 9600, 19200): ',0 LXI D,BAUDBUF ; Point to new input buffer CALL J$INBUF CALL J$CRLF LXI D,BAUDBUF+2 ; STUPR2: CALL J$INLNCP ; Compare BAUDBUF+2 with chars. below DB '300',0 JNC OK300 ; Go if got match CALL J$INLNCP DB '1200',0 JNC OK1200 CALL J$INLNCP DB '2400',0 JNC OK2400 CALL J$INLNCP DB '4800',0 JNC OK4800 CALL J$INLNCP DB '9600',0 JNC OK9600 CALL J$ILPRT ; All matches failed, tell operator DB '++ Incorrect entry ++',CR,LF,BELL,CR,LF,0 JMP STUPR1 ; Try again ; OK300: MVI A,1 ; Load MSPEED 300 baud value MVI E,BD300 JMP LOADBD ; OK1200: MVI A,5 MVI E,BD1200 JMP LOADBD ; OK2400: XRA A ; Reset the automatic 2400 bps flag STA MANUAL MVI A,6 MVI E,BD2400 JMP LOADBD ; OK4800: MVI A,7 MVI E,BD4800 JMP LOADBD ; OK9600: MVI A,8 MVI E,BD9600 JMP LOADBD ; OK19200:MVI A,9 MVI E,BD19200 ; LOADBD: STA MSPEED ; Save Modem Speed MVI C,37 ; T-FCN 37 set Comm baud rate MVI D,CHNL ; Select current modem channel number CALL TDOS RET ;..... ; ; ; BAUD RATE TABLE ; BD300 EQU 5 ; 300 baud BD1200 EQU 7 ; 1200 bps BD2400 EQU 10 ; 2400 bps BD4800 EQU 12 ; 4800 bps BD9600 EQU 14 ; 9600 bps BD19200 EQU 15 ; 19200 bps ;..... ; ; RCVCTL1:PUSH B ; Test Modem Input Status PUSH D PUSH H MVI C,34 ; T-FCN 34 MODEM Status MVI D,CHNL ; Select current modem channel number CALL TDOS CPI 0FFH POP H ; Restore Registers POP D POP B RET ;..... ; ; RCVCTL2:MVI A,0 ; TBE always true.... RET ;..... ; ; RCVDATP:PUSH B ; Read in a Character PUSH D PUSH H MVI C,35 ; T-FCN 35 Comm channel input MVI D,CHNL ; Select current modem channel number CALL TDOS POP H POP D POP B RET ;..... ; ; SNDDATP:PUSH B ; Send out a Character PUSH D PUSH H MVI C,36 ; T-FCN 36 Comm channel output MVI D,CHNL ; Select current modem channel number MOV E,A ; Character in 'E' register CALL TDOS POP H POP D POP B RET ;..... ; ; BAUDBUF: DB 10,0,0,0,0,0 DB 0,0,0,0,0,0 ;..... ; ; end ;----------------------------------------------------------------------- ; NOTE: Must terminate by 0400H ; END