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- ;
- ; I2CR-1.ASM - Cromemco TUART overlay for IMP - 12/27/86
- ;
- ; Uses the 5501 I/O
- ;
- ; 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 systems with the Cromemco TUART to IMP.
- ;
- ; 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,I2CR-1.HEX
- ;
- ; = = = = = = = = = = = = = = = = = =
- ;
- ; 12/27/87 - Adapted from I2NH-2 - Mark D. Pickerill
- ; 10/27/85 - Minor changes - Irv Hoff
- ; 09/03/85 - Written to work with IMP - Irv Hoff
- ;
- ; = = = = = = = = = = = = = = = = = =
- ;
- YES: EQU 0FFH ; Value for yes
- NO: EQU 0 ; Value for no
- ;
- ; Values shown are for a TMS 5501
- ;
- PORT: EQU 30H ; Your base port (data or status)
- MDDATP: EQU PORT+1 ; Modem data port
- BDR: EQU PORT ; Baud rate port
- MDCTL1: EQU PORT ; Status port
- MSKP: EQU PORT+3 ; Interrupt mask port
- MDRCV: EQU 40H ; Modem receive ready (dav)
- MDSND: EQU 80H ; Modem send ready bit (TBE)
- MDTXE: EQU 80H ; Modem send buffer empty, holding buffer empty
- MDRSET: EQU 09H ; Resets uart for additional commands
- MASK: EQU 0 ; No interrupts from device
- ;
- ;-----------------------------------------------------------------------
- ;
- 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 'E' ; Clear screen character (ESC not needed) 10Ah
- CLOCK: DB 20 ; Clock speed in MHz x10, 25.5 MHz max. 10Bh
- ; 20=2 mhh, 37=3.68 mhz, 40=4 mhz, etc.
- BYTDLY: DB 1 ; 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 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 CTL-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 YES ; Yes if no DTR and need +++ to disconnect 11Eh
- ;.....
- ;
- ;
- ; Handles in/out ports for data and status
- ;
- I$MDCTL1: IN MDCTL1 ; 11Fh
- RET ; In modem control port 121h
- DB 0,0,0,0,0,0,0 ; Spares if needed 122h
- ;
- I$MDTXE: IN MDCTL1 ; (Needed for SIO or Dart register 1 129h
- RET ; 12Bh
- DB 0,0,0,0,0,0,0 ; 12Ch
- ;
- I$MDDATP: IN MDDATP ; 133h
- RET ; 135h
- DB 0,0,0,0,0,0,0 ; Spares if needed 136h
- ;
- O$MDDATP: OUT MDDATP ; 13Dh
- RET ; Out modem data port 13Fh
- DB 0,0,0,0,0,0,0 ; Spares if needed 140h
- ;
- 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 1AA7h
- DB 'Version for Cromemco TUART modem port 30h' ; 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 'This is a Cromenco with TUART I/O...',CR,LF,0
- ;
- ;-----------------------------------------------------------------------
- ;
- ; This routine normally sets DTR low for 300 ms to disconnect the phone.
- ; As the TUART does not support DTR, this routine is deleted from this
- ; overlay and NODTR is set true. If your TUART has been modified to
- ; control DTR (using the spare 1488/1489 sections), patch the routine
- ; below accordingly.
- ;
- 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 ;
- ;
- ;;; (Command to set DTR low goes here,if added)
- ;;;
- ;;; MVI B,3 ; Delay 300 ms to hang up phone
- ;;; CALL J$TIMER
- ;;;
- ;;; (Command to set DTR high goes here, if added)
- ;
- RET
- ;
- ; Sets tms 5501 to 8 bits, no parity, 1 stop
- ;
- INITMOD:
- LDA MSPEED ; Get the selected value
- CPI 1 ; 300 bps
- JZ OK300
- CPI 5 ; 1200 bps
- JZ OK1200
- CPI 6 ; 2400 bps
- JZ OK2400
- JMP STUPR1 ; Else ask what is wanted
- ;.....
- ;
- ;
- STUPR: CALL J$CMDSPL ; Gives us cmdbuf+6
- JNC STUPR2
- ;
- STUPR1: LDA HS2400 ; 2400 baud?
- ORA A ; Force flags
- JZ STUPR1A ; No, skip part showing 2400 available
- CALL J$ILPRT
- DB 'Input Baud Rate (300, 1200, 2400): ',0
- JMP AROUND ; Around next
- ;
- STUPR1A:CALL J$ILPRT
- DB 'Input Baud Rate (300, 1200): ',0
- ;
- AROUND: LXI D,BAUDBUF ; Point to new input buffer
- CALL J$INBUF
- CALL J$CRLF
- LXI D,BAUDBUF+2
- ;
- STUPR2: CALL J$INLNCP ; Compare BAUDBUF+2 with chars. below
- DB '300',0 ; 300 baud
- JNC OK300 ; Go if got match
- CALL J$INLNCP
- DB '1200',0 ; 1200 baud
- JNC OK1200
- CALL J$INLNCP
- DB '2400',0 ; 2400 baud
- JNC OK2400
- CALL J$ILPRT ; All matches failed, tell operator
- DB '++ Incorrect entry ++',CR,LF,BELL,CR,LF,0 ; Screwup
- JMP STUPR1 ; Try again
- ;
- OK300: MVI A,1 ; MSPEED 300 baud value
- MVI B,BD300 ; Get 300 baud parameters in B
- JMP LOADBD ; Go load them
- ;
- OK1200: MVI A,5 ; MSPEED 1200 bps value
- MVI B,BD1200 ; Get 1200 baud parameters in B
- JMP LOADBD ; Go do it
- ;
- OK2400: LDA HS2400 ; 2400 bps supported?
- ORA A ; Force flags
- JZ OK1200 ; Exit, if not
- ;
- XRA A
- STA MANUAL
- MVI A,6 ; MSPEED 2400 baud value
- MVI B,BD2400 ; Get 2400 baud parametes in B
- JMP LOADBD ; Go do it
- ; ;
- LOADBD: STA MSPEED ; Change time-to-send to match baudrate
- ;
- ;
- ; This routine initializes 1 chanel of the Cromemco TUART.
- ; Accepts: Baud rate in B
- ; Returns: Nothing.
- ; Clobbers: Nothing.
- ; Calls: Nothing.
- ;
- INIT: PUSH PSW ; Save A reg.
- MVI A,MDRSET ; Get command
- OUT PORT+2 ; Device reset
- MVI A,MASK ; Get interrupt mask
- OUT MSKP ; Mask set
- MOV A,B ; Get baud rate
- OUT BDR ; Rate set
- POP PSW ; Restore acc
- RET ; Go home
- ;.....
- ;
- ;
- ; Table of baudrate parameters
- ;
- BD300: EQU 84H ; 300 baud
- BD1200: EQU 88H ; 1200 baud
- BD2400: EQU 90H ; 2400 baud
- ;
- BAUDBUF:DB 10,0,0,0,0,0
- DB 0,0,0,0,0,0
- ;
- ; end
- ;-----------------------------------------------------------------------
- ;
- ; Note: must terminate by 0400h
- ;
- END
-