; I2CPC-V.ASM - Schneider CPC overlay file for IMP - 14.11.88 ; ; Vortex RS232C - Schnittstelle ; ; 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 SCHNEIDER CPC series computers to IMP.COM. ; ; Edit this file for your preferences then follow the "TO USE:" example ; shown below. ; ; Many terminals will clear the screen with a CTL-Z. If yours does, put ; a 1AH at CLEAR: (010AH). Many terminals use two characters, the first ; normally an ESC. For example, ESC *. In this case put '*' at CLEAR: ; (The ESC will automatically be typed with no CTL-character present.) ; If you don't know what your terminal uses, put a 0 at CLEAR: and IMP ; will scroll up 24 blank lines to clear the CRT for things like MENU, ; looking at the function key table, typing CTL-Z in command mode, etc. ; ; 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,I2CPC-V.HEX ; ;---------------------------------------------------------------------- ; ; USING 5-1/4" DRIVES? You may experience problems with slow access ; times. Symptoms of the problem are: If you get a timeout when it ; stops each 128 records to dump to disk, this sometimes causes things ; to get out of synch and the program eventually aborts. ; ; SOLUTION: Change byte 0BFFh from 80h (128 decimal for 16k disk dumps) ; to 40h (64 decimal for 8k disk dumps). You can do this with either ; DDT or easier with the telephone overlay library which has this byte ; prominently displayed so it can be readily changed. (Then use DDT or ; MLOAD to install the revised telephone library.) ; ; This allows the disk dump to terminate in less than 10 seconds and the ; file transfer can then proceed normally. ; ; NOTE: do not use 19200 if you have the slow disk drives ; like the SSSD hard-sectored (40 track) drives. ; ; = = = = = = = = = = = = = = = = = = ; 11/14/88 - Nochmals ueberarbeitet f. v2.45 - B. Bollinger ; 11/15/87 - Anpassung an Schneider CPC - Berthold Bollinger ; 10/27/85 - Restored baud rates to those normally used with this equip- ; ment. If others are needed, install those on an individual ; basis, please. Other incidental changes. ; - Irv Hoff ; 10/24/85 - Added more baud rates - Fred Townsend ; 09/08/85 - Added 19200 Baud - Fred Townsend ; 07/17/85 - Written to work with IMP - Irv Hoff ; ; = = = = = = = = = = = = = = = = = ; ; YES EQU 0FFH NO EQU 0 ; ; ; PORT EQU 0FADCH ; Your base port (data or status) MDCTL1 EQU PORT+1 ; Modem control port MDDATP EQU PORT ; Modem data port MDRCV EQU 01H ; Modem receive ready MDSND EQU 04H ; Modem send ready bit MDTXE EQU 04H ; Modem send buffer empty, holding buffer empty WMTIMER EQU 0FBDFH ;8253 write mode word register TXTIMER EQU 0FBDCH ;8253 channel A (Tx) RXTIMER EQU 0FBDDH ;8253 channel B (Rx) ; ; ;----------------------------------------------------------------------- ; ESC EQU '['-40H ; ^[ = 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 'L'-40H ; ^Z = Clears screen, command mode only EOFCHAR EQU 'Z'-40H ; ^Z = End of file ; ; ;----------------------------------------------------------------------- ; ; 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 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 0 ; Clear screen character (ESC not needed) 10AH ; ---------------- fuer CPM 2.2 kann bei CLEAR 0CH stehen, fuer CPM plus 'E' CLOCK: DB 40 ; Clock speed in MHz x10, 25.5 MHz max. 10BH ; 20=2 MHh, 37=3.68 MHz, 40=4 MHz, etc. 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 1 ; 0=0 delay 1=100 ms 5=500 ms - 9=900 ms 1028H ; default time for extra wait after CRLF ; in terminal mode file transfer NOFCOL: DB 5 ; Number of directory columns shown 10EH TCHPUL: DB 'P' ; 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 0FCH ; ESC = precedes 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 BRKCHR: DB 'Q' ; Send break tone 11DH NODTR: DB NO ; Yes if no DTR and need +++ to disconnect 11EH ;..... ; ; ; Handles in/out ports for data and status ; I$MDCTL1: DI PUSH B LXI B,MDCTL1 ; Modem control port DB 0EDH,078H ; IN (C),A POP B EI RET ; ; I$MDTXE: DI PUSH B LXI B,MDCTL1 ; Modem control port DB 0EDH,078H ; IN (C),A POP B EI RET ; ; I$MDDATP: DI PUSH B LXI B,MDDATP ; Modem data port DB 0EDH,078H ; IN (C),A POP B EI RET ; ; O$MDDATP: DI PUSH B LXI B,MDDATP ; Modem data port DB 0EDH,079H ; OUT (C),A POP B EI RET ; ;..... ; ; A$MDRCV: ANI MDRCV ; 147H RET ; 149H ; C$MDRCV: CPI MDRCV ; 14AH RET ; 14CH ; A$MDSND: ANI MDSND ; 14DH RET ; 14FH ; C$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$EXITVEC:RET ; 159H DB 0,0 ; 15AH ;..... ; ; ; Jump vectors needed by each overlay ; J$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 'Version fuer Schneider CPC + Vortex RS232',CR,LF,0 RET ;..... ; ; ;----------------------------------------------------------------------- ; ; NOTE: You can change the SYSVR message to be longer or shorter. The ; end of your last routine should terminate by 0400H (601 bytes ; available after start of SYSVR). ; ;----------------------------------------------------------------------- ; ; 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 'HALLO',CR,0 ; ;----------------------------------------------------------------------- ; ; ; This routine sets DTR low for 300 ms to disconnect the phone ; O$MDCTL1: LXI B,MDCTL1 ; Modem control port DB 0EDH,079H ; OUT (C),A RET ; ; GOODBYE:MVI B,'S'-40H ; X-off to stop host if needed CALL J$SNDCHR MVI B,1 ; Wait a moment to let it react CALL J$TIMER MVI A,5 ; -> WR 5 CALL O$MDCTL1 MVI A,068H ; DTR LOW CALL O$MDCTL1 MVI B,3 ; 300 MS CALL J$TIMER MVI A,5 ; -> WR 5 CALL O$MDCTL1 MVI A,0EAH ; DTR HIGH CALL O$MDCTL1 RET ;..... ; ; INITMOD:LDA MSPEED ; Get the selected value CPI 1 ; 300 bps JZ OK300 CPI 5 ; 1200 bps JZ OK1200 CPI 6 ; 2400 bps JZ OK2400 CPI 7 ; 4800 bps JZ OK4800 CPI 8 ; 9600 bps JZ OK9600 JMP STUPR1 ; Else ask what is wanted ; INITMOD1: MVI A,53 ; mode init tx timer LXI B,WMTIMER ; write mode word register DB 0EDH,079H ; OUT (C),A ; TXLSP: MVI A,04H ; Default 'LSP' speed for 1200 bps LXI B,TXTIMER ; timer Tx register DB 0EDH,079H TXMSP: MVI A,01H ; Default 'MSP' speed for 1200 bps DB 0EDH,079H ; OUT (C),A MVI A,117 ; Mode init Rx Timer LXI B,WMTIMER ; Write mode word register DB 0EDH,079H ; OUT (C),A RXLSP: MVI A,04H LXI B,RXTIMER ; und dasselbe fuer Rx-Timer DB 0EDH,079H RXMSP: MVI A,01H DB 0EDH,079H ; SETSIO: MVI A,018H ; channel reset CALL O$MDCTL1 MVI A,04H ; WR 4 CALL O$MDCTL1 MVI A,044H ; *16,8,1,N CALL O$MDCTL1 MVI A,03H ; WR 3 CALL O$MDCTL1 MVI A,0C1H ; Rx 8 bit enable CALL O$MDCTL1 MVI A,05H ; WR 5 CALL O$MDCTL1 MVI A,0EAH ; Tx 8 bit enable, DTR high CALL O$MDCTL1 RET ;..... ; ; ; The following routine changes the baud rate with the SET command. ; STUPR: CALL J$CMDSPL ; Gives us CMDBUF+6 JNC STUPR2 ; STUPR1: CALL J$ILPRT DB 'Input Baud Rate (300, 1200, 2400, 4800, 9600): ',0 LXI D,BAUDBUF ; Point to new input buffer CALL J$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 ; MSPEED 300 baud value LXI H,BD300 ; Get 300 baud parameters in HL JMP LOADBD ; Go load them ; OK1200: MVI A,5 LXI H,BD1200 JMP LOADBD ; OK2400: XRA A STA MANUAL MVI A,6 LXI H,BD2400 JMP LOADBD ; OK4800: MVI A,7 LXI H,BD4800 JMP LOADBD ; OK9600: MVI A,8 LXI H,BD9600 ; LOADBD: STA MSPEED ;store speed to show transfer time MOV A,L ;get least significant baud rate byte STA TXLSP+1 ;store in INITMOD STA RXLSP+1 MOV A,H ;get most signifcant baud rate byte STA TXMSP+1 ;store in INITMOD STA RXMSP+1 JMP INITMOD1 ; Reinitialize to new baudrate, done ;..... ; ; ; Table of baud rate parameters ; BD300 EQU 0417H BD1200 EQU 0104H BD2400 EQU 0052H BD4800 EQU 0026H BD9600 EQU 0013H ; BAUDBUF:DB 10,0,0,0,0,0 DB 0,0,0,0,0,0 ; ; end ;----------------------------------------------------------------------- ; ; NOTE: Must terminate prior to 0400H ; END