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-
- ; I2AP3-3.ASM - Apple /// overlay file for IMP - 06/01/87
- ;
- ; 6551 I/O with built-in baudrate generator
- ;
- ;
- ; This overlay file adapts the Apple /// SoftCard /// CP/M 2.21 to IMP
- ; and external modems. Note that only speeds up to 2400 baud are al-
- ; lowed since the CP/M-6502 overhead is too great for any faster commun-
- ; ications. (I tried 4800 & 9600 but lost too many characters and file
- ; transfers just did'nt work.)
- ;
- ; For those that are interested, this overlay uses the Device Function
- ; and Status calls built into the BIOS of 2.21 for the express purpose
- ; of dealing with SOS Drivers directly. For details, refer to the Soft-
- ; card /// CP/M 2.21 Technical Description and also the Standard Device
- ; Drivers Manual.
- ;
- ;
- ; 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,I2A3-x.HEX
- ;
- ;
- ; NOTE TO APPLE /// USERS:
- ;
- ; This overlay assumes that you have configured
- ; your DRIVER.SOS file to include the .RS232
- ; driver (Version 1.30) to the RD1: and PU1:
- ; devices. You may also use the serial driver
- ; for the Serial Card /// in any slot without
- ; changes to this overlay. Just assign the
- ; driver to RD1: & PU1: Also note that you may
- ; NOT have an active printer assigned to the LIST
- ; device if it uses the same port as the modem.
- ;
- ;-----------------------------------------------------------------------
- ;
- ; 06/01/87 - Added Break routine. Exit and - Douglas Thom
- ; disconnect now drop DTR.
- ; 10/27/85 - Modified to drop DTR. - Steve Smith
- ; 09/13/85 - Written for IMP244. - Douglas Thom
- ;
- ;-----------------------------------------------------------------------
- ;
- YES EQU 0FFH
- NO EQU 0
- ;
- ;-----------------------------------------------------------------------
- ;
- 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 = Clear screen, command mode only
- EOFCHAR EQU 'Z'-40H ; ^Z = End of file
- ;
- ;
- ;==================== CUSTOMIZATION EQUATES ============================
- ;
- 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 YES ; Yes=2400 bps highest speed 104H
- HS1200: DB NO ; 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 28 ; Clear screen character (ESC not needed) 10AH
- ;
- CLOCK: DB 4 ; 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
- 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$MDCTL1: JMP RCVCTL1 ; In modem control port 11FH
- DB 0,0,0,0,0,0,0 ; Spares if needed 122H
- ;
- I$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$MDRCV: ANI MDRCV ; 147H
- RET ; 149H
- ;
- C$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$EXITVEC:JMP EXITPRG
- ;
- ; Jump vectors needed by each overlay
- ;
- J$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 'Apple /// CP/M 2.21 (RS232 Port) ' ; 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 an Apple /// user',CR,0
- ;
- ;================== Apple /// Specific Routines ========================
- ;
- PUNCH EQU 0DA12H ; BIOS vector for Punch routine
- READER EQU 0DA15H ; BIOS vector for Reader routine
- ZDVMGR EQU 0DA36H ; BIOS vector for Device Manager Call
- DVSTAT EQU 0DA3FH ; BIOS vector for Device Status Call
- DVFUNC EQU 0DA42H ; BIOS vector for Device Function Call
- DEVTAB EQU 0DF00H ; Device table location
- BUFFER EQU 0E400H ; Control Buffer
- DEVICE EQU 00004H ; Logical Device number
- IOBYTE EQU 00003H ; IOBYTE location
- ;.....
- ;
- ;
- ; This routine sends a 466 ms break signal. Refer to the Apple ///
- ; Standard Device Drivers Manual (page 127) for details on the
- ; command.
- ;
- SENDBRK:
- DB 0D9H ; Use Z80 alt. registers to save...
- LXI H,BUFFER ; Point to Buffer
- MVI M,2 ; Break time (233ms * 2)
- LDA CONFIG ; Get Device Configuration Number
- MOV C,A ; put it in 'C' register
- MVI B,3 ; Transmit Break
- CALL DVFUNC ; Device Function call (6502)
- DB 0D9H ; Restore Registers
- RET ; Return to caller...
- ;.....
- ;
- ;
- ; This routine sets DTR low for 300 ms to disconnect the phone
- ;
- GOODBYE:
- MVI A,7 ; SOS Device close command
- CALL DVMGR ; To set DTR low
- MVI B,3 ; Wait for 300 ms
- CALL J$TIMER
- MVI A,6 ; SOS Device open command
- CALL DVMGR ; To open the .RS232 driver again
- CALL ZRESET ; Reset driver to bring DTR back up
- JMP SPDCHK ; Restore modem speed
- ;.....
- ;
- ;
- INITMOD:
- LDA DEVTAB+DEVICE ; Get CP/M Configuration Number
- STA CONFIG ; Save it for future use
- MOV C,A
- MVI B,1 ; Get .RS232 Parmeters
- CALL DVSTAT ; Do it....
- LXI H,BUFFER+1 ; Point to Baud Rate
- MOV A,M ; Save it way for future use
- STA OLDBAUD
- LDA IOBYTE ; Get current IO Byte
- STA IOSAVE ; Save it away for lager
- ORI 3 ; Force Console to CO4:
- STA IOBYTE
- MVI A,6 ; Open .RS232 driver
- CALL DVMGR
- ;
- SPDCHK: LDA MSPEED ; Get Baud Rate value
- CPI 1 ; Is it 300 baud
- JZ OK300
- CPI 5 ; Is it 1200 baud
- JZ OK1200
- CPI 6 ; Is it 2400 baud
- JZ OK2400
- JMP STUPR1 ; Else ask for Speed
- ;.....
- ;
- ;
- DVMGR: DB 0D9H ; Save Registers in Alt Z80 Registers
- STA 0E8C0H ; SOS Command location
- LDA CONFIG ; Get CP/M Configuration
- STA 0E8C1H ; Pass to SOS Device Manager
- CALL ZDVMGR ; Do SOS command
- DB 0D9H ; Restore Registers
- RET
- ;.....
- ;
- ;
- EXITPRG:
- LDA IOSAVE ; Return to CO1:
- STA IOBYTE
- LDA OLDBAUD ; Restore original Baudrate
- MOV B,A ; Stuff it in 'B'
- CALL LOADBD ; Do it...
- MVI A,7 ; Close up RS232 driver
- CALL DVMGR ; do it....
- RET
- ;.....
- ;
- ;
- RCVCTL1:
- PUSH B ; Test Modem Input Status
- PUSH D
- PUSH H
- MVI B,3 ; Status code 3 (Retrieve Driver Buffer)
- LDA CONFIG ; Get Driver Number
- MOV C,A
- CALL DVSTAT ; Do Device Status Call
- LHLD BUFFER+6 ; Look at Buffer Size
- MOV A,L
- ORA H
- JZ INRDY ; Buffer is not empty....
- MVI A,01H ; Buffer is empty...
- ;
- INRDY: 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
- CALL READER
- POP H
- POP D
- POP B
- RET
- ;.....
- ;
- ;
- SNDDATP:
- PUSH B ; Send out a Character
- PUSH D
- PUSH H
- MOV C,A
- CALL PUNCH
- POP H
- POP D
- POP B
- RET
- ;.....
- ;
- ;
- ZRESET: DB 0D9H ; Use Z80 alt. registers (Save Regs)
- LDA CONFIG
- MOV C,A
- MVI B,0 ; Device function reset
- CALL DVFUNC
- DB 0D9H ; Restore Registers
- RET
- ;.....
- ;
- ;
- STUPR: CALL J$CMDSPL ; Gives us CMDBUF+6
- JNC STUPR2
- ;
- STUPR1: CALL J$ILPRT ; Print following Message
- DB 'Input Baud Rate (300, 1200, 2400): ',0
- LXI D,BAUDBUF ; Point to new input buffer
- CALL J$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 Match
- CALL J$INLNCP
- DB '1200',0
- JNC OK1200
- CALL J$INLNCP
- DB '2400',0
- JNC OK2400
- CALL J$ILPRT ; All matches failed, tell user
- DB '++ Incorrect entry ++',CR,LF,BELL,CR,LF,0
- JMP STUPR1
- ;.....
- ;
- ;
- OK300: MVI A,1 ; Load MSPEED 300 baud value
- MVI B,BD300 ; Get Baudrate Value
- JMP LOADBD
- ;
- OK1200: MVI A,5 ; Load MSPEED 1200 baud value
- MVI B,BD1200 ; Get Baudrate Value
- JMP LOADBD
- ;
- OK2400: XRA A
- STA MANUAL ; Reset to maximum auto-speed
- MVI A,6 ; Load MSPEED 2400 baud value
- MVI B,BD2400 ; Get Baudrate Value
- ;.....
- ;
- ;
- LOADBD: STA MSPEED ; Save Modem Speed
- MOV A,B
- STA A3BD ; Stuff Baud into Driver...
- LXI B,14 ; Move 14 bytes
- LXI H,RS232 ; Move Control Parameters into
- LXI D,BUFFER ; Device Driver Buffer
- DB 0EDH,0B0H ; LDIR instruction
- LDA CONFIG ; Get Configuration Number
- MOV C,A
- MVI B,1 ; Set Control Parmeters
- CALL DVFUNC ; do it....
- RET
- ;.....
- ;
- ;
- IOSAVE: DB 0 ; Temp storage for IOBYTE
- CONFIG: DB 0 ; Configuration Number
- OLDBAUD: DB 8 ; Storage for Original Baudrate
- ;.....
- ;
- ;
- RS232: DB 0FH ; Buffer size
- A3BD: DB 8 ; 2400 bps baud rate value
- DB 0,0,0,0,0
- DB 013H,011H
- DB 0DFH,084H
- DB 050H,0,080H
- ;.....
- ;
- ;
- ; Table of baudrate values
- ;
- BD300 EQU 6 ; 300 baud
- BD1200 EQU 8 ; 1200 bps
- BD2400 EQU 10 ; 2400 bps
- ;
- BAUDBUF:
- DB 10,0,0,0,0,0
- DB 0,0,0,0,0,0
- ;.....
- ;
- ; end
- ;-----------------------------------------------------------------------
- ;
- ; NOTE: Must terminate by 0400H
- ;
- END