home *** CD-ROM | disk | FTP | other *** search
-
- TITLE 'I2IBM.ASM - IBM PC w/NEC V20 overlay file for IMP2 - 05/23/86'
- ; Run under V20CPM.COM
- ;
- ; 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 IMP2
- ; 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.CPM or equivalent
- ; assembler. Then use MLOAD to merge into the main file:
- ;
- ; MLOAD IMP.CPM=IMP244.CPM,I2IBM
- ;
- ; = = = = = = = = = = = = = = = = = =
- ;
- ; 05/23/86 - Adapted to IBM PC with NEC V20 - Dennis Fagan
- ; 07/17/85 - Written to work with IMP2 - Irv Hoff
- ;
- ; = = = = = = = = = = = = = = = = =
- ;
- ;
- YES EQU 0FFH
- NO EQU 0
- ;
- ;
- PORT EQU 3F8H ; Base port (data or Baud rate)
- MODCMD EQU PORT+3 ; Modem control port
- MODDAT EQU PORT ; Modem data port
- MODSTT EQU PORT+5 ; Modem status port
- MODST2 EQU PORT+6 ; Modem status port 2
- ;
- MDRCV EQU 01H ; Modem receive ready
- MDTXE EQU 20H ; Modem transmit ready
- MDCTS EQU 10H ; Modem CTS
- ;
- BRPORT EQU PORT ; Baud rate generator port
- ;
- ;
- ;-----------------------------------------------------------------------
- ;
- ESC EQU '['-40H ; ^[ = Escape
- BELL EQU 'G'-40H ; ^G = Bell character
- LF EQU 'J'-40H ; ^J = Linefeed
- èNEXTRY 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
- ;
- ;
- ;-----------------------------------------------------------------------
- ;
- ; NOTE: The following patch enables status checking on an 8250 Comm. IC.
- ; This chip senses RXRDY & TXRDY on one port and CTS on another.
- ; The ORG of this patch is version dependent. This is for IMP244.
- ; To install on another version, examine the code referenced from
- ; loc. 186 and change the CALL 11F to a CALL 129.
- ;
- ORG 1ED1H
- CALL I$MDRTXE
- ;
- 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 38 ; 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 NO ; Yes=convert rub to backspace 111H
- CRCDFLT: DB YES ; Yes=default to CRC checking 112H
- IGNRCTL: DB NO ; 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
- èLOGCHR: 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 YES ; Text string DTR 11EH
- ;.....
- ;
- ;
- ; Handles in/out ports for data and status
- ;
- ORG 11FH
- I$MDCTL: PUSH H ; Read Modem status 11FH
- PUSH D
- PUSH B
- LXI D,MODST2 ; Select port
- JMP INCOM1 ; Common code
- ;
- ORG 129H
- I$MDRTXE: PUSH H ; Read RX/TX status 129H
- PUSH D
- PUSH B
- LXI D,MODSTT ; Select port
- JMP INCOM1 ; Common code
- ;
- ORG 133H
- I$MDDATP: PUSH H ; Read data 133H
- PUSH D
- PUSH B
- LXI D,MODDAT ; Select port
- JMP INCOM1 ; Common code
- ;
- ORG 13DH
- O$MDDATP: PUSH H ; Write data 13DH
- PUSH D
- PUSH B
- LXI D,MODDAT ; Select port
- JMP OUCOM1
- ;.....
- ;
- ;
- ORG 147H
- A$MDRCV: ANI MDRCV ; 147H
- RET ; 149H
- ;
- C$MDRCV: CPI MDRCV ; 14AH
- RET ; 14CH
- ;
- A$MDSND: ANI MDCTS ; 14DH
- RET ; 14FH
- ;
- C$MDSND: CPI MDCTS ; 150H
- RET ; 152H
- ;
- A$MDTXE: ANI MDTXE ; 153H
- RET ; 155H
- ;
- C$MDTXE: CPI MDTXE ; 156H
- RET ; 158H
- ;.....
- ;
- ;
- ; Special exit vector, used by some computers to reset interrupt vectors
- è;
- J$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 16B:IMP
- ;
- ;
- ; 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
- è DB 'Version for IBM PC running a NEC V20' ; 1AAH
- DB ' under V2080',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 'This is an IBM PC',CR,LF,0
- ;
- ;-----------------------------------------------------------------------
- ;
- ;
- GOODBYE:
- MVI B,'S'-40H ; X-off to stop host if needed
- CALL J$SNDCHR
- RET
- ;
- OUTD2: PUSH H
- PUSH D
- PUSH B
- LXI D,MODDAT+1 ; Select port
- ;
- OUCOM1: MOV C,A ; Set value
- MVI B,1 ; Set output (B<>0)
- DB 21H ; Trick jump over INCOM1
- ;
- INCOM1: MVI B,0 ; Set input (B=0)
- MVI A,1 ; Flag direct port I/O
- DW 0EDEDH ; NEC V20 to 8086 code change
- DB 62H ; Via INT 62
- POP B ; Restore
- POP D
- POP H
- RET ; Done with I/O
- ;
- OUTC2: PUSH H
- PUSH D
- PUSH B
- LXI D,MODCMD+1 ; Select port
- JMP OUCOM1 ; Common code
- ;
- OUTCMD: PUSH H
- PUSH D
- PUSH B
- LXI D,MODCMD ; Select port
- JMP OUCOM1 ; Common code
- ;
- ;
- ; IBM PC initialization -- sets CTC timer for send and receive baudrate
- ;
- ;
- INITMOD:
- LDA MSPEED ; Get the selected value
- CPI 10
- JC LOADBD ; set it
- JMP STUPR1 ; Else ask what is wanted
- ;.....
- ;
- ;
- ; Sets the modem speed via the SET command.
- ;
- ;
- STUPR: CALL J$CMDSPL ; Gives us CMDBUF+6
- JNC STUPR2
- ;
- STUPR1: CALL J$ILPRT
- DB 'Input Baud Rate ( 110, 300, 600, 1200, 2400, 4800, 9600): ',0
- LXI D,BAUDBUF ; Point to new input buffer
- CALL J$INBUF
- CALL J$CRLF
- LXI D,BAUDBUF+2
- ;
- STUPR2: CALL J$INLNCP ; Compare BAUDBUF+2 with chars. below
- DB '110',0
- JNC OK110
- CALL J$INLNCP
- DB '300',0
- JNC OK300 ; Go if got match
- CALL J$INLNCP
- DB '600',0
- JNC OK600
- 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
- BRER: CALL J$ILPRT ; All matches failed, tell operator
- DB '++ Incorrect entry ++',CR,LF,BELL,CR,LF,0
- JMP STUPR1 ; Try again
- ;
- OK110: SUB A ; A=0
- DB 11H ; Trick jump
- ;
- OK300: MVI A,1 ; A=1
- DB 11H
- ;
- OK600: MVI A,3
- DB 11H
- ;
- èOK1200: MVI A,5
- DB 11H
- ;
- OK2400: MVI A,6
- DB 11H
- ;
- OK4800: MVI A,7
- DB 11H
- ;
- OK9600: MVI A,8
- ;
- LOADBD: STA MSPEED ; Change time-to-send to match baudrate
- MOV E,A ; Get baudrate byte
- MVI D,0
- LXI H,BAUDTB ; Build pntr
- DAD D
- DAD D
- MOV A,M ; Fetch timer val
- ORA A
- JZ BRER ; Non-supported
- MVI A,80H ; Setup for baud divisor
- CALL OUTCMD
- MOV A,M ; Set LSH
- CALL O$MDDATP
- INX H
- MOV A,M ; Set MSH
- CALL OUTD2
- MVI A,3
- CALL OUTCMD ; 8 Bit data,no parity,1 SB
- JMP OUTC2 ; DTR/RTS
- ;
- BAUDTB: DW 417H ; 110
- DW 180H ; 300
- DW 0
- DW 0C0H ; 600
- DW 0
- DW 060H ; 1200
- DW 030H ; 2400
- DW 018H ; 4800
- DW 00CH ; 9600
- DW 0
- ;
- BAUDBUF:DB 10,0,0,0,0,0
- DB 0,0,0,0,0,0
- ;
- ; end
- ;-----------------------------------------------------------------------
- ;
- ; NOTE: Must terminate prior to 0400H
- ;
- END