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- ; I2CP-2.ASM - Overlay file for the CompuPro Interfacer 3/4 - 06/01/87
- ;
- ; 2651 I/O with built-in baudrage generator
- ;
- ; The Interfacer board uses the 2651 I/O. This has a peculiarity that
- ; prevents its proper use if you hook pin 8 (DCD) of the modem to pin 8
- ; (DCD) of the Interfacer board. You should instead hook pin 8 of the
- ; modem (DCD) to (DSR) on the Interfacer board. To further complicate
- ; the picture, CompuPro uses an unique wiring they refer to as "master"
- ; or "slave setting". Normally the board is delivered with the serial
- ; ports hooked as "slave", which makes (DSR) pin 20 instead of the con-
- ; ventional pin 6 as on most RS-232 DB-25 connectors. It then makes
- ; (DTR) pin 6 instead of conventional pin 20. (See page 14 of the In-
- ; terfacer 3 manual or page 20 of the Interfacer 4 manual for additional
- ; information on this subject. The schematic below is shown for both
- ; configurations.
- ;
- ; (For interest, the newer version of the 2561 is called the 2661. It
- ; came out in 1981, but has this same bug the 2651 has. That chip is
- ; used in the Heath/Zenith-100 series computers. The 2651 has another
- ; serious bug, if selecting other than 1 stop pulse, it must receive an
- ; incoming signal with the same (or more) stop pulses. Fortunately few
- ; people need 1-1/2 or 2 stop pulses so this bug is rarely a problem.)
- ;
- ; NOTE FOR HAYES SMARTMODEM USERS:
- ; -------------------------------
- ; In the past people using the Hayes Smartmodem 1200 and the
- ; Interfacer board have complained they had to put SW6 up to
- ; use with BYE5 but then had to put it down to use with IMP,
- ; MDM7,MES or other autodial modem programs. With the con-
- ; figuration below, SW6 can be left in whatever position the
- ; user prefers (up, for BYE5) and this will have no effect on
- ; the normal use of IMP, MEX or MDM7.
- ;
- ;
- ; If using "slave" mode:
- ; ---------------------
- ; MODEM=DCE INTERFACER (Slave mode)
- ;
- ; TXD 2 --> 3 RXD received data
- ; RXD 3 <-- 2 TXD tranmitted data
- ; SG 7 --- 7 SG signal ground
- ; DCD 8 --> 20 * DSR data set ready (carrier)
- ; DTR 20 <-- 6 * DTR data terminal ready
- ;
- ;
- ; If using "master" mode
- ; ----------------------
- ; MODEM=DCE INTERFACER (as Master)
- ;
- ; TXD 2 --> 2 RXD received data
- ; RXD 3 <-- 3 TXD tranmitted data
- ; SG 7 --- 7 SG signal ground
- ; DCD 8 --> 6 DSR data set ready (carrier)
- ; DTR 20 <-- 20 DTR data terminal ready
- ;
- ; - Notes by Irv Hoff
- ;
- ;-----------------------------------------------------------------------
- ;
- ; This overlay adapts IMP.COM to the CompuPro Interfacer 3/4 serial
- ; card using the 2651 USART. If using a 6 MHz clock 1-2 wait states may
- ; be needed to keep from dropping characters. Note: This overlay can be
- ; modified to work with the Apple CPS Multifunction card which uses the
- ; same 2651 USART.
- ;
- ; 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.
- ;
- ; 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,I2CP-x.HEX
- ;
- ; = = = = = = = = = = = = = = = = = =
- ;
- ; 06/01/87 Improved the GOODBYE routine, added BREAK routine, needs
- ; IMP245 to use it. Added information on wiring the modem
- ; cable - Irv Hoff
- ;
- ; 05/07/87 Improved the GOODBYE routine, added information on wiring
- ; the modem cable. - Irv Hoff
- ; 10/27/85 Written to work with IMP - Irv Hoff
- ;
- ; = = = = = = = = = = = = = = = = =
- ;
- ;
- YES EQU 0FFH
- NO EQU 0
- ;
- ;
- PORT EQU 010H ; Modem data port for Interfacer 3 or 4 cards
- MDCTL1 EQU PORT+1 ; Modem control port
- MDDATP EQU PORT ; Modem data port
- MDRCV EQU 02H ; Modem receive ready
- MDSND EQU 01H ; Modem send ready bit
- MDTXE EQU 05H ; Modem send buffer empty, holding buffer empty
- CHIP EQU 6 ; Selects slave mode (users 6 or 7)
- UPORT EQU PORT+7 ; User select port (6 and 7 are slave mode)
- ;
- ;
- ;-----------------------------------------------------------------------
- ;
- 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 'Z'-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 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.
- 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
- BRKCHR: DB 'Q' ; Send a break tone 11DH
- NODTR: DB NO ; YES if no DTR and need ATH0 to disconnect 11EH
- ;.....
- ;
- ;
- ; Handles in/out ports for data and status
- ;
- I$MDCTL1: MVI A,CHIP ; Select correct user port 11FH
- OUT UPORT ; 121H
- IN MDCTL1 ; 123H
- RET ; 125H
- DB 0,0,0 ; 126H
- ;
- I$MDTXE: MVI A,CHIP ; Select correct user port 129H
- OUT UPORT ; 12BH
- IN MDCTL1 ; 12DH
- RET ; 12FH
- DB 0,0,0 ; 130H
- ;
- I$MDDATP: MVI A,CHIP ; Select the correct port 133H
- OUT UPORT ; 135H
- IN MDDATP ; 137H
- RET ; 139H
- DB 0,0,0 ; 13AH
- ;
- O$MDDATP: PUSH PSW ; 13DH
- MVI A,CHIP ; 13EH
- OUT UPORT ; 140H
- POP PSW ; 142H
- OUT MDDATP ; Out modem data port 143H
- RET ; 145H
- DB 0 ; 146H
- ;.....
- ;
- ;
- 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$TIMER: DS 3 ; .1 second timer (amount in 'B' reg.) 192H
- J$BREAK: JMP SENDBRK ; Break routine 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 for CompuPro Interfacer-3 or 4 ' ; 1AAH
- DB '(port ',CHIP+'0',')',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 'Nice chatting with you, bye for now.',CR,LF,0
- ;
- ;-----------------------------------------------------------------------
- ;
- ; This routine sets a 300 ms break tone
- ;
- SENDBRK:
- MVI A,3FH ; DTR normal, send break tone
- JMP GOODBYE1
- ;.....
- ;
- ;
- ; This routine sets DTR low for 300 ms to disconnect the phone
- ;
- GOODBYE:
- MVI A,CHIP ;select chip
- OUT UPORT
- MVI A,1DH ; Set RTS, flags, DTR, break
- ;
- GOODBYE1:
- OUT PORT+3 ; Put command register out of mode
- IN PORT+3 ; Make sure it is now clear
- IN PORT+3 ; Try once more
- MVI B,3 ; Turn off DTR for 300 ms
- CALL J$TIMER
- MVI A,37H ; Turn DTR back on
- OUT PORT+3 ; Send to command register
- IN PORT+3 ; Clear any incoming characters
- IN PORT+3 ; Try once more
- XRA A ; Clear the 'A' register
- RET
- ;.....
- ;
- ;
- ; Initializes the 2561 I/O for selected baudrate
- ;
- INITMOD:
- LDA MSPEED ; Get the selected value
- CPI 1 ; 300 bps
- JZ OK300
- CPI 5 ; 1200 bps
- JZ OK1200
- CPI 6 ; 2400 bps
- JZ OK2400
- CPI 8 ; 9600
- JZ OK9600
- CPI 9
- JZ OK19200 ; 19200 BPS
- JMP STUPR1 ; Else ask what is wanted
- ;
- INITMOD1:
- MVI A,CHIP ; Select correct user port
- OUT UPORT
- XRA A ; Set RTS, flags, DTR, disable R/T
- OUT PORT+3 ; Put command register out of mode
- IN PORT+3 ; Makes sure it is now clear
- IN PORT+3 ; Try once more
- MVI A,4EH ; Select 8 data bits no parity 1 stop
- OUT PORT+2 ; Send to mode register 1
- MOV A,B ; Get the baudrate back
- OUT PORT+2 ; Send to mode register 2
- MVI A,37H ; Turn on DTR etc, reset any error flags
- OUT PORT+3 ; Send to command register
- IN PORT+3 ; Clear any incoming characters
- IN PORT+3 ; Try once more
- RET
- ;.....
- ;
- ;
- ; Use the 'SET' command to select a desired baud rate
- ;
- STUPR: CALL J$CMDSPL ; Gives us CMDBUF+6
- JNC STUPR2
- ;
- STUPR1: CALL J$ILPRT
- DB 'Input Baud Rate (300, 1200, '
- DB '2400, 9600, 19200): ',0
- LXI D,BAUDBUF ; Point to new input buffer
- CALL J$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$INLNCP
- DB '9600',0
- JNC OK9600
- CALL J$INLNCP
- DB '19200',0
- JNC OK19200
- 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
- MVI B,BD300 ; Get 300 baud value for 2651 in 'B'
- JMP LOADBD ; Go load everything
- ;
- OK1200: MVI A,5
- MVI B,BD1200
- JMP LOADBD
- ;
- OK2400: XRA A
- STA MANUAL
- MVI A,6
- MVI B,BD2400
- JMP LOADBD
- ;
- OK9600: MVI A,8
- MVI B,BD9600
- JMP LOADBD
- ;
- OK19200:MVI A,9
- MVI B,BD19200
- ;
- LOADBD: STA MSPEED ; Change time-to-send to match baudrate
- JMP INITMOD1 ; Reinitialize to new baudrate, done
- ;.....
- ;
- ;
- ; Table of baudrate parameters
- ;
- BD300 EQU 35H ; 300 baud
- BD1200 EQU 37H ; 1200 bps
- BD2400 EQU 3AH ; 2400 bps
- BD9600 EQU 3EH ; 9600 bps
- BD19200 EQU 3FH ; 19200 bps
- ;
- BAUDBUF:DB 10,0,0,0,0,0
- DB 0,0,0,0,0,0
- ;
- ; end
- ;-----------------------------------------------------------------------
- ;
- ; NOTE: Must terminate prior to 0400H
- ;
- END