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-
- ; I2MDA-3.ASM - Morrow Micro-Decision overlay file for IMP - 06/01/87
- ;
- ; MD-3 8281, MD-5 or MD-121 Z80 SIO
- ;
- ; Version for ALL Micro-Decisions, including hard disk models, ROM v1.x
- ; machines (no parallel port), and ROM revision 2.x and 3.x machines
- ; with (with parallel port).
- ;
- ; If you are using this overlay for the MD-HD computer (MD-5, -11, etc.)
- ; you have two additional options in the SET command: AUX and P/M. When
- ; using SET AUX, it selects the Auxilliary port as your modem port. The
- ; SET P/M selects the Printer/Modem port. Select either the MDHDA or
- ; the MDHDP equate below as the DEFAULT modem port. You can always use
- ; the SET command later to swap ports.
- ; - Paul Bartholomew
- ;-----------------------------------------------------------------------
- ;
- ; 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 all of the MD series computers. Be sure and select
- ; which model you have below.
- ;
- ; 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,I2MDA-x.HEX
- ;
- ; = = = = = = = = = = = = = = = = = =
- ;
- ; 06/01/87 Improved the GOODBYE routine, added BREAK routine, needs
- ; v3 IMP245 to use it. - Irv Hoff
- ;
- ; 09/24/85 Fixed bug with MD-HD overlay trashing the BC registers in
- ; v2 the I/O routines. There are now only 3 or 4 bytes left
- ; in the MD-HD overlay before it goes past the 0400h limit.
- ; - Paul Bartholomew
- ; 09/23/85 - Written to work with IMP - Paul Bartholomew
- ; v1
- ;
- ; = = = = = = = = = = = = = = = = =
- ;
- ;
- YES EQU 0FFH
- NO EQU 0
- ;
- ;
- ; Set ONE AND ONLY ONE of the following to YES, all the rest to NO:
- ;
- MD3R1 EQU NO ; Set to YES for MD-2/3 with Revision 1.x ROM
- MD3R2 EQU NO ; Set to YES for MD-2/3 with Revision 2.x or 3.x ROM
- MDHDA EQU NO ; Set to YES for MD-HD using Auxilliary port
- MDHDP EQU YES ; Set to YES for MD-HD using Printer/Modem port
- ;
- ;
- ; EQUates for MD-2/3 all ROM's
- ;
- IF (MD3R1 OR MD3R2)
- MDDATP EQU 0FEH ; Printer/Modem DATA port
- MDCTL1 EQU 0FFH ; Printer/Modem STATUS port
- MDRCV EQU 02H ; Modem receive ready
- MDSND EQU 01H ; Modem send ready bit
- MDTXE EQU 05H ; Modem send buffer empty, holding buffer empty
- ENDIF
- ;
- ;
- ; CTC EQUates for MD-2/3 ROM 2.x and 3.x
- ;
- IF MD3R2
- BPORT EQU 0F2H
- CPORT EQU 0F3H
- CTCSEL EQU 0BEH
- ENDIF
- ;
- ;
- ; EQUates for MD-HD using Auxilliary port
- ;
- IF MDHDA
- PORT EQU 70H ; Auxilliary BASE port
- BRPORT EQU 50H ; Baud rate port
- BMODE EQU 3EH ; Mode
- ENDIF
- ;
- ;
- ; EQUates for MD-HD using Printer/Modem port
- ;
- IF MDHDP
- PORT EQU 62H ; Printer/Modem BASE port
- BRPORT EQU 51H ; Baud rate port
- BMODE EQU 7EH ; Mode
- ENDIF
- ;
- ;
- ;EQUates for MD-HD
- ;
- IF (MDHDA OR MDHDP)
- MDCTL1 EQU PORT+1 ; Modem control port
- MDDATP EQU PORT ; Modem data port
- MOPORT EQU 53H ; Mode port
- MDRCV EQU 01H ; Modem receive ready
- MDSND EQU 04H ; Modem send ready bit
- MDTXE EQU 01H ; Modem send buffer empty, holding buffer empty
- ENDIF
- ;
- ;-----------------------------------------------------------------------
- ;
- 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 ; 1=300 5=1200 6=2400 7=4800 8=9600 9=19200 103H
- 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 '*' ; 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$MDCTL1:
- JMP IMDC ; 11FH
- DB 0,0,0,0,0,0,0 ; Spares if needed 122H
- ;
- I$MDTXE:
- JMP IMDT ; 129H
- DB 0,0,0,0,0,0,0 ; 12CH
- ;
- I$MDDATP:
- JMP IMDD ; 133H
- DB 0,0,0,0,0,0,0 ; 136H
- ;
- O$MDDATP:
- JMP OMDD ; 13DH
- DB 0,0,0,0,0,0,0 ; 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$STRNG1: DS 3 ; 2400 bps "AT" string 16B:IMP
- ;
- ;
- ; Next fourteen lines should not be changed by user overlay as these go
- ; to specific locations in the main program, not in the overlay.
- ;
- ;
- J$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$TIMER: DS 3 ; .1 second timer (amount in 'B' reg.) 192H
- J$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 ' ; 1AAH
-
- IF MD3R1
- DB 'Morrow MD-2/3 with Revision 1.x ROM'
- ENDIF
-
- IF MD3R2
- DB 'Morrow MD-2/3 with Revision 2.x or 3.x ROM'
- ENDIF
-
- IF MDHDA
- DB 'Morrow MD-HD using Auxilliary Port'
- ENDIF
-
- IF MDHDP
- DB 'Morrow MD-HD using Printer/Modem Port'
- ENDIF
-
- 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 Morrow Micro Decision computer',CR,LF,0
- ;
- ;-----------------------------------------------------------------------
- ;
- ; Modem I/O for MD-2/3 all ROM's:
- ;
- ; Input STATUS to A
- ;
- IF MD3R1 OR MD3R2
- IMDC: IN MDCTL1
- RET
- ;.....
- ;
- ;
- ; Check for transmit ready
- ;
- IMDT:
- IN MDCTL1
- RET
- ;.....
- ;
- ;
- ; Input byte from DATA port to A
- ;
- IMDD:
- MVI A,37H
- OUT MDCTL1
- IN MDDATP
- RET
- ;.....
- ;
- ;
- ; Output byte in A to DATA port
- ;
- OMDD:
- OUT MDDATP
- RET
- ENDIF ; MD3R1 OR MD3R2
- ;
- ;-----------------------------------------------------------------------
- ;
- ; Modem I/O for MD-HD using either port:
- ;
- ; BASE PORT - Changed by SET
- ;
- ; DON'T CHANGE THE ORDER OF THE FOLLOWING 3 BYTES!
- ; ------------------------------------------------
- ;
- IF MDHDA OR MDHDP
- BSPRT: DB PORT
- BRPRT: DB BRPORT
- BMD: DB BMODE
- ;.....
- ;
- ;
- ; Input STATUS to 'A' register
- ;
- IMDC: PUSH B
- LDA BSPRT
- MOV C,A
- INR C
- MVI A,10H ; Register 0, reset interrupts
- DW 79EDH ; Z80 opcodes for OUT (C),A
- DW 78EDH ; Z80 opcodes for IN A,(C)
- POP B
- RET ; IN modem control port
- ;.....
- ;
- ;
- ; Check for transmit ready
- ;
- IMDT: PUSH B
- LDA BSPRT
- MOV C,A
- INR C
- MVI A,11H ; Read register 1, for "all sent"
- DW 79EDH ; Z80 opcodes for OUT (C),A
- DW 78EDH ; Z80 opcodes for IN A,(C)
- POP B
- RET
- ;.....
- ;
- ;
- ; Input byte from DATA port to A
- ;
- IMDD: PUSH B
- LDA BSPRT
- MOV C,A
- DW 78EDH ; Z80 opcodes for IN A,(C)
- POP B
- RET
- ;....
- ;
- ;
- ; Output byte in A to DATA port
- ;
- OMDD:
- PUSH B
- PUSH PSW
- LDA BSPRT
- MOV C,A
- POP PSW
- DW 79EDH ; Z80 opcodes for OUT (C),A
- POP B
- RET
- ENDIF ; MDHDA OR MDHDP
- ;
- ;-----------------------------------------------------------------------
- ;
- ;
- ; This routine sets a 300 ms break tone for the 8251 I/O
- ;
- IF MD3R1 OR MD3R2 ; 8251A
- SENDBRK:
- MVI A,3FH ; DTR normal, send break tone
- JMP GOODBYE+2 ; Send the break tone
- ENDIF ; MD3R1 OR MD3R2
- ;
- ;
- ; This routine sets a 300 ms break tone for the Z80 SIO
- ;
- IF MDHDA OR MDHDP ; Z80 SIO
- SENDBRK:
- MVI A,0F8H ; DTR normal, send break tone
- STA GOODBYE1+1 ; Reset value temporarily
- CALL GOODBYE ; Send the break tone
- MVI A,78H ; Restore original value
- STA GOODBYE1+1
- RET
- ENDIF ; MDHDA OR MDHDP
- ;.....
- ;
- ;
- ; This routine sets DTR low for 300 ms to disonnect the phone
- ;
- IF MD3R1 OR MD3R2 ; 8251A
- GOODBYE:
- MVI A,3DH ; Send break, turn off DTR
- OUT MDCTL1 ; Send to status port
- MVI B,3 ; Delay 300 ms to hang up phone
- CALL J$TIMER
- MVI A,37H ; Normal send/receive with DTR
- OUT MDCTL1 ; Send to status port
- RET
- ENDIF ; MD3R1 OR MD3R2
- ;
- IF MDHDA OR MDHDP ; Z80 SIO
- GOODBYE:
- LDA BSPRT
- MOV C,A
- INR C
- MVI A,5
- DW 79EDH ; Z80 opcode for OUT (C),A
- ;
- GOODBYE1:
- MVI A,78H ; Turn off DTR
- DW 79EDH ; Z80 opcode for OUT (C),A
- MVI B,3 ; Wait for 300 ms
- PUSH B
- CALL J$TIMER
- POP B
- MVI A,5
- DW 79EDH ; Z80 opcode for OUT (C),A
- MVI A,0E8H ; Restore normal, 8 bits, DTR on, etc.
- DW 79EDH ; Z80 opcode for OUT (C),A
- POP B ; Restore the stack
- RET
- ENDIF ; MDHDA OR MDHDP
- ;
- ;-----------------------------------------------------------------------
- ;
- ; MD-2/3 ROM 1.x initialization
- ;
- IF MD3R1 ; 8251A
- INITMOD:
- MVI A,087H ; Insure out of mode
- OUT MDCTL1 ; Modem status port
- OUT MDCTL1 ; Slight extra delay
- MVI A,40H ; Initialize USART
- OUT MDCTL1 ; Modem status port
- ;
- INITMOD1:
- MVI A,17H ; DTR, RCV, XMT, error reset
- OUT MDCTL1 ; Modem status port
- IN MDDATP ; Clear data port
- LDA MSPEED ; Get the selected value
- CPI 9+1
- JNC STUPR1 ; If invalid, ask for baud, else default
- JMP GETBAUD
- ENDIF ; MD3R1
- ;
- ;-----------------------------------------------------------------------
- ;
- ; MD-2/3 ROM 2.x and 3.x initialization
- ;
- ; Makes sure we are ok on the 2nd serial port
- ;
- IF MD3R2
- INITMOD:
- MVI A,087H
- OUT MDCTL1
- MVI A,40H
- OUT MDCTL1
- MVI A,4EH
- OUT MDCTL1
- MVI A,17H
- OUT MDCTL1
- ;
- ;
- ; Sets default baudrate to MSPEED selection on CTC
- ;
- INITMOD1:
- LDA MSPEED ; Get the selected value
- CPI 9+1
- JNC STUPR1 ; If invalid, ask for baud, else
- JMP GETBAUD ; set to default
- ENDIF ; MD3R2
- ;
- ;-----------------------------------------------------------------------
- ;
- ; Morrow MD-HD initialization
- ;
- IF MDHDA OR MDHDP ; Z80 SIO
- INITMOD:
- PUSH B
- LDA BSPRT
- MOV C,A
- INR C
- MVI A,0 ; Select register 0
- DW 79EDH ; Z80 opcode for OUT (C),A
- MVI A,18H ; Throw out of mode
- DW 79EDH ; Z80 opcode for OUT (C),A
- MVI A,4 ; Select register 4
- DW 79EDH ; Z80 opcode for OUT (C),A
- MVI A,44H ; 16x, 1 stop, parity off (44=1, 4C=2)
- DW 79EDH ; Z80 opcode for OUT (C),A
- MVI A,3 ; Select register 3
- DW 79EDH ; Z80 opcode for OUT (C),A
- MVI A,0C1H ; Enable receive
- DW 79EDH ; Z80 opcode for OUT (C),A
- MVI A,5 ; Select register 5
- DW 79EDH ; Z80 opcode for OUT (C),A
- MVI A,0E8H ; Enable send, 'DTR', 'RTS'
- DW 79EDH ; Z80 opcode for OUT (C),A
- ;
- POP B
- LDA MSPEED ; Get the selected value
- CPI 9+1
- JNC STUPR1 ; If invalid, ask for baud, else
- JMP GETBAUD ; set to default
- ENDIF ; MDHDA OR MDHDP
- ;.....
- ;
- ;
- ; Setup routine to allow changing modem speed with the SET command.
- ;
- STUPR: CALL J$CMDSPL ; Gives us CMDBUF+6
- JNC STUPR2
- ;
- STUPR1: CALL J$ILPRT
- DB 'Input Baud Rate '
- ;
- IF MD3R1
- DB '(300,1200): ',0
- ENDIF ; MD3R1
- ;
- IF MD3R2
- DB '(300,1200,2400,4800,9600): ',0
- ENDIF ; MD3R2
- ;
- IF MDHDA OR MDHDP
- DB '(300,1200,2400,4800,9600,19200,P/M,AUX): ',0
- ENDIF ; MDHDA OR MDHDP
- ;
- LXI D,BAUDBUF ; Point to new input buffer
- CALL J$INBUF
- CALL J$CRLF
- LXI D,BAUDBUF+2
- ;...
- ;
- ;
- STUPR2: CALL J$INLNCP
- DB '300',0
- JNC OK300
- ;
- CALL J$INLNCP
- DB '1200',0
- JNC OK1200
- ;
- IF NOT MD3R1
- CALL J$INLNCP
- DB '2400',0
- JNC OK2400
- ;
- CALL J$INLNCP
- DB '4800',0
- JNC OK4800
- ;
- CALL J$INLNCP
- DB '9600',0
- JNC OK9600
- ENDIF ; NOT MD3R1
- ;
- IF MDHDA OR MDHDP
- CALL J$INLNCP
- DB '19200',0
- JNC OK19200
- ;
- CALL J$INLNCP
- DB 'P/M',0
- JNC OKPM
- ;
- CALL J$INLNCP
- DB 'AUX',0
- JNC OKAUX
- ENDIF ; MDHDA OR MDHDP
- ;
- CALL J$ILPRT ; All matches failed, tell operator
- DB '++ Incorrect entry ++',CR,LF,BELL,CR,LF,0
- JMP STUPR1 ; Try again
- ;
- ;-----------------------------------------------------------------------
- ;
- ;Baud rate code for MD-2/3 ROM 1.x
- ;
- IF MD3R1
- OK300: MVI A,1 ; MSPEED 300 baud value
- JMP GETBAUD ; Go load them
- ;
- OK1200: MVI A,5 ; MSPEED 1200 bps value
- JMP GETBAUD ; Go load th;em
- ;
- OK2400: JMP OK1200 ; Doesn't support 2400 bps
- ;...
- ;
- ;
- GETBAUD:STA MSPEED
- MVI B,4FH ; Divide by 64 for 300 baud
- CPI 1
- JZ LOADBD
- MVI B,04EH ; Divide by 16 for 1200 bps (default)
- ;
- LOADBD: STA MSPEED ; Change time-to-send to match baudrate
- MOV A,B ; Get baudrate byte
- OUT MDCTL1 ; Modem status port
- IN MDDATP ; Read in any garbage
- RET
- ENDIF ; MD3R1
- ;
- ;-----------------------------------------------------------------------
- ;
- ; Common baud rate code for MD-2/3 ROM's 2.x and 3.x and MD-HD
- ;
- IF NOT MD3R1
- OK300: MVI A,1
- JMP GETBAUD
- ;
- OK1200: MVI A,5
- JMP GETBAUD
- ;
- OK2400: XRA A
- STA MANUAL ; Reset to maximum auto-speed
- MVI A,6
- JMP GETBAUD
- ;
- OK4800: MVI A,7
- JMP GETBAUD
- ;
- OK9600: MVI A,8
- JMP GETBAUD
- ;
- OK19200:MVI A,9
- ENDIF
- ;
- ;-----------------------------------------------------------------------
- ;
- ; Code to swap ports on the MD-HD
- ;
- IF MDHDA OR MDHDP
- OKPM: MVI A,062H
- STA BSPRT
- LXI H,7E51H
- SHLD BRPRT
- JMP INITMOD
- ;
- OKAUX:
- MVI A,070H
- STA BSPRT
- LXI H,3E50H
- SHLD BRPRT
- JMP INITMOD
- ENDIF
- ;
- ;-----------------------------------------------------------------------
- ;
- ; Common baud rate code for MD-2/3 ROM's 2.x and 3.x and MD-HD
- ;
- IF NOT MD3R1
- GETBAUD:PUSH PSW
- LXI H,BDTAB
- ADD A ; *2
- MOV E,A
- MVI D,0
- DAD D
- MOV A,M
- INX H
- MOV H,M
- MOV L,A ; HL = baud rate divisor
- POP PSW
- JMP LOADBD
- ENDIF ; NOT MD3R1
- ;
- ;-----------------------------------------------------------------------
- ;
- ; Baud rate code for MD-2/3 ROM's 2.x and 3.x
- ;
- IF MD3R2
- LOADBD: STA MSPEED
- MVI A,CTCSEL
- OUT CPORT
- MOV A,L
- OUT BPORT
- MOV A,H
- OUT BPORT
- RET
- ENDIF
- ;
- ;-----------------------------------------------------------------------
- ;
- ; Baud rate code for MD-HD
- ;
- IF (MDHDA OR MDHDP)
- LOADBD: STA MSPEED ; Change time-to-send to match baudrate
- LDA BMD
- OUT MOPORT
- PUSH B
- LDA BRPRT
- MOV C,A
- MOV A,L
- DW 79EDH ; Z80 opcode for OUT (C),A
- MOV A,H
- DW 79EDH ; Z80 opcode for OUT (C),A
- POP B
- RET
- ENDIF ;(MDHDA OR MDHDP)
- ;
- ;-----------------------------------------------------------------------
- ;
- ; Table of baud rate values for MD-2/3 ROM's 2.x and 3.x
- ;
- IF MD3R2
- BDTAB: DW 0 ; 110 baud (not supported)
- DW 417 ; 300 baud
- DW 0 ; 450 baud (not supported)
- DW 0 ; 600 baud (not supported)
- DW 0 ; 710 baud (not supported)
- DW 104 ; 1200 bps
- DW 52 ; 2400 bps
- DW 26 ; 4800 bps
- DW 13 ; 9600 bps
- DW 0 ; 19200 bps (not supported)
- ENDIF ; MD3R2
- ;
- ;-----------------------------------------------------------------------
- ;
- ; Table of baud rate values for MD-HD
- ;
- IF MDHDA OR MDHDP
- BDTAB: DW 0 ; 110 baud (not supported)
- DW 417*2 ; 300 baud
- DW 0 ; 450 baud (Not supported)
- DW 0 ; 600 baud (not supported)
- DW 0 ; 710 baud (Not supported)
- DW 104*2 ; 1200 bps
- DW 52*2 ; 2400 bps
- DW 26*2 ; 4800 bps
- DW 13*2 ; 9600 bps
- DW 13 ; 19200 bps
- ENDIF ; MDHDA OR MDHDP
- ;
- BAUDBUF:DB 10,0,0,0,0,0
- DB 0,0,0,0,0
- ;
- ; end
- ;-----------------------------------------------------------------------
- ;
- ; NOTE: Must terminate prior to 0400H
- ;
- END