; I2MDA-5.ASM -- Morrow Micro-Decision overlay file for IMP -- 04/04/88 ; ; MD-2&3 Intel 8251A UART / MD-5,11,16,22,34 Zilog SIO/9 ; ; Version for ALL Micro-Decisions, including hard disk models and floppy ; disk models, both ROM v1.x machines, no parallel port and ROM revision ; 2.x and 3.x machines (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. YOU MUST SELECT JUST ONE. ; ; 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. ; ; New Comment Re: Limitations of the SET command . ; The SET command sets MSPEED only! Not modem brand type or its maximum ; speed. Initialization commands differ between Hayes 1200 and 2400 mo- ; dels. Therefore, when changing 1200-2400 baud w/all except w/in Pro- ; Modem or Racal, reassemble OR reconfigure w/IMPATCH.COM, which is not ; an Irv Hoff program i.e., not written, approved or checked by him. ; ; TO USE: First edit this file filling in answers for your equipment. ; Then assemble with ASM.COM, MAC.COM or equivalent assembler ; to get a I2MDA-5.HEX. Then use MLOAD to merge into the main ; file: ; ; MLOAD IMP.COM=IMP.COM,I2MDA-5.HEX ; ; = = = = = = = = = = = = = = = = = = ; ; 04/04/88 Revised the SENDBRK, GOODBYE, GOODBYE1, INITMOD routines for ; v5 both hard disk and floppy machines, based on conversations ; and ZSID debugging session with Bill Smith and further con- ; versation with Irv Hoff, author of IMP. DEFAULTS set for 1 ; stop bit, 1200 baud, Hayes compatible modems. Slowed ASCII ; text upload delays; from 2ms to 4 ms between characters and ; from 200 ms to 400 ms at end-of-line. NODTR defaults to NO. ; New comments including above re: limitations of SET command. ; Bug feedback welcomed from those NOT trying a public domain ; modem program for the 1st time. -Ilbert Butler ; ; 09/09/87 Changed INITMOD routines for 2 stop bits; not really a ; v4 revision, just a little more info. - Steve Wartofsky ; ; 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 YES ; Set to YES for MD-HD using Auxilliary port MDHDP EQU NO ; 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 4 ; 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 4 ; 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 8251A I/O ; IF MD3R1 OR MD3R2 ; 8251A SENDBRK: MVI A,3FH ; Send break tone, DTR=on RTS=on (1F RTS=off) JMP GOODBYE+2 ; Send break w/GOODBYE, skipping 1st 2 bytes ENDIF ; MD3R1 OR MD3R2 ; ; ; This routine sets a 300 ms break tone for the Z80 SIO/9 ; IF MDHDA OR MDHDP ; Z80 SIO SENDBRK: MVI A,0FAH ; Send break tone, DTR=on RTS=on (F8 RTS=off) STA GOODBYE1+1 ; Temp. reset GOODBYE1 break val. skip 1st byte CALL GOODBYE ; Send break tone via GOODBYE routine MVI A,78H ; Restore orig. GOODBYE1 val. (DTR=off/RTS=off) 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,1DH ; Send break, DTR=off/RTS=off OUT MDCTL1 ; Send to status port MVI B,3 ; Delay 300 ms to hang up phone CALL J$TIMER MVI A,37H ; MD default 8 bits/DTR=on/RTS=on (17 RTS=off) OUT MDCTL1 ; Send to status port RET ENDIF ; MD3R1 OR MD3R2 ; IF MDHDA OR MDHDP ; Z80 SIO/9 GOODBYE: LDA BSPRT MOV C,A INR C MVI A,5 DW 79EDH ; Z80 opcode for OUT (C),A ; GOODBYE1: MVI A,78H ; Send break (68=no brk) DTR=off/RTS=off DW 79EDH ; Z80 opcode for OUT (C),A MVI B,3 ; Delay 300 ms to hang up phone PUSH B CALL J$TIMER POP B ; Restore the stack MVI A,5 ; Select register 5 DW 79EDH ; Z80 opcode for OUT (C),A MVI A,0EAH ; MD default 8 bits/DTR=on/RTS=on (E8 RTS=off) DW 79EDH ; Z80 opcode for OUT (C),A 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 ; To modem status port OUT MDCTL1 ; Slight extra delay recommended MVI A,40H ; Initialize USART (internal reset) OUT MDCTL1 ; To modem status port MVI A,04EH ; Send enable 16xclk/8 bits/no par/1 stop bit OUT MDCTL1 ; To modem status port /(1=04E/2=0CE) MVI A,37H ; Rcv enable DTR=on/RTS=on(17=off w/error reset) OUT MDCTL1 ; To modem status port ; Note - 8251A cannot transmit W/O CTS INITMOD1: IN MDDATP ; Clear data port LDA MSPEED ; Get 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 ; IF MD3R2 INITMOD: MVI A,087H ; Insure out of mode OUT MDCTL1 ; To modem status port MVI A,40H ; Initialize USART (internal reset) OUT MDCTL1 ; To modem status port MVI A,04EH ; Send enable 16xclk/8 bits/no par/1 stop bit OUT MDCTL1 ; To modem status port /(1=04E/2=0CE) MVI A,37H ; Rcv enable DTR=on/RTS=on(17=off w/error reset) OUT MDCTL1 ; To modem status port ; Note - 8251A cannot transmit w/o CTS ; ; Sets default baudrate to MSPEED selection on CTC ; INITMOD1: LDA MSPEED ; Get selected value CPI 9+1 JNC STUPR1 ; If invalid, ask for baud, else default JMP GETBAUD ENDIF ; MD3R2 ; ;----------------------------------------------------------------------- ; ; Morrow MD-HD initialization ; IF MDHDA OR MDHDP ; Z80 SIO/9 INITMOD: PUSH B LDA BSPRT MOV C,A INR C MVI A,18H ; Channel reset (no need select register 0) 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 ; 16xclk/1 stop bit (44=1/4C=2)/parity off 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 ; Rcv enable 8 bits (E1 autoHSK=no send w/o CTS DW 79EDH ; Z80 opcode for OUT (C),A MVI A,5 ; Select register 5 DW 79EDH ; Z80 opcode for OUT (C),A MVI A,0EAH ; Send enable 8 bits/DTR=on/RTS=on (E8 RTS=off) DW 79EDH ; Z80 opcode for OUT (C),A POP B ; Restore the stack LDA MSPEED ; Get selected value CPI 9+1 JNC STUPR1 ; If invalid, ask for baud, else default JMP GETBAUD ; 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