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m7pc-1.aqm
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M7PC-1.ASM
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Assembly Source File
|
1985-02-09
|
12KB
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496 lines
; M7PC-1.ASM -- Overlay for IBM PC With a Baby Blue Z80 CPU for MDM7xx.
; 11/11/83
;
; This overlay adapts the MDM7xx program to the IBM PC With a Baby Blue
; Z-80 CPU card.
;
; Some Z-80 code is used in this overlay to allow it to fit inside of
; 400H. (Start of dialing routines.) It is included by some EQU's at
; the beginning. DO NOT REMOVE THEM.
;
; 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.
;
; The 'SET' command can be used to change the baud rate to a selected
; value. It comes up at 300 baud.
;
; Edit this file for your preferences then follow the "TO USE:" example
; shown below.
;
; TO USE: First edit this file filling in answers for your own
; equipment. Then assemble with ASM.COM or equivalent
; assembler. Then use DDT to overlay the the results
; of this program to the original .COM file:
;
; A>DEBUG DDT.COM
; -G
; DDT VERS 2.2
; -I MDM7xx.COM (Original version with bound header)
; -R
; NEXT PC
; 4300 0100
; -IM7PC-1.HEX (note the "I" command)
; -R ("R" loads in the .HEX file)
; NEXT PC
; 4300 0000
; -G0 (return to CP/M)
; Program terminated normally
; -RCS
; CS xxxx (present code seg. pointer)
; :1000 (segment address of Baby Blue memory)
; -RCS
; CX xxxx
; :4200 (size of program to be saved)
; -NMDM7xx.CPM (note extention .CPM not .COM)
; -W (write the file)
; Writing 4200 bytes
; -Q (exit from debug)
; A>BIND MDM7xx.CPM (bind on the header to all programs
; to run under CP/M)
;
; = = = = = = = = = = = = = = = = = =
;
; 11/11/83 - Renamed to M7PC-1.ASM, no changes - Irv Hoff
; 09/04/83 - Adapted to IBM PC With a Baby Blue Z80 CPU from
; MDM710OT.ASM (Otrona) - David Rounds
;
; = = = = = = = = = = = = = = = = =
;
;======================Z80 BRANCH EQUATES===============================
;
;
BNC EQU 30H
BZ EQU 28H
BR EQU 18H
BC EQU 38H
BNZ EQU 20H
;
;;; EXAMPLE OF USE OF Z80 BRANCH INSTRUCTIONS
;;;
;;; ORG 100H
;;;
;;; NEXT: DB BR,START-NEXT-2 AND 0FFH ;branch to start:
;;; START: DB BR,NEXT-START-2 AND 0FFH ;branch to next:
;;;
;;; END 100H
;;;
;=======================================================================
;
;
;
BELL: EQU 07H ;bell
CR: EQU 0DH ;carriage return
ESC: EQU 1BH ;escape
LF: EQU 0AH ;linefeed
CLS: EQU 1AH ;clear screen
;
;
; BDOS EQUATES
;
BDOS: EQU 0005H
WRCON: EQU 02H
RDCON: EQU 01H
PUNCH: EQU 04H
;
;
;
YES: EQU 0FFH
NO: EQU 0
;
;
PORT EQU 03F8H
MODCTL1 EQU PORT+3 ;line control register
MODCTL2 EQU PORT+4 ;modem control register
MODDATO EQU PORT ;data out port
MODDATP EQU PORT ;data in port
MODST1 EQU PORT+5 ;line status register
MODST2 EQU PORT+6 ;modem status register
;
MODRCVB EQU 01H
MODRCVR EQU 01H
MODSNDB EQU 20H
MODSNDR EQU 20H
;
;
ORG 100H
;
;
;
DS 3 ;(for "JMP START" instruction)
;
PMMIMODEM: DB NO ;yes=PMMI S-100 Modem 103H
SMARTMODEM: DB NO ;yes=HAYES Smartmodem, no=non-PMMI 104H
TOUCHPULSE: DB 'T' ;T=touch, P=pulse (Smartmodem-only) 105H
CLOCK: DB 25 ;clock speed in MHz x10, 25.5 MHz max. 106H
;20=2 MHh, 37=3.68 MHz, 40=4 MHz, etc.
MSPEED: DB 5 ;0=110 1=300 2=450 3=600 4=710 5=1200 107H
;6=2400 7=4800 8=9600 9=19200 default
BYTDLY: DB 5 ;0=0 delay 1=10ms 5=50 ms - 9=90 ms 108H
;default time to send character in ter-
;minal mode file transfer for slow BBS.
CRDLY: DB 5 ;0=0 delay 1=100 ms 5=500 ms - 9=900 ms 109H
;default time for extra wait after CRLF
;in terminal mode file transfer
NOOFCOL: DB 5 ;number of DIR columns shown 10AH
SETUPTST: DB YES ;yes=user-added Setup routine 10BH
SCRNTEST: DB YES ;Cursor control routine 10CH
ACKNAK: DB YES ;yes=resend a record after any non-ACK 10DH
;no=resend a record after a valid-NAK
BAKUPBYTE: DB NO ;yes=change any file same name to .BAK 10EH
CRCDFLT: DB YES ;yes=default to CRC checking 10FH
TOGGLECRC: DB YES ;yes=allow toggling of CRC to Checksum 110H
CONVBKSP: DB NO ;yes=convert backspace to rub 111H
TOGGLEBK: DB YES ;yes=allow toggling of bksp to rub 112H
ADDLF: DB NO ;no=no LF after CR to send file in 113H
;terminal mode (added by remote echo)
TOGGLELF: DB YES ;yes=allow toggling of LF after CR 114H
TRANLOGON: DB YES ;yes=allow transmission of logon 115H
;write logon sequence at location LOGON
SAVCCP: DB YES ;yes=do not overwrite CCP 116H
LOCONEXTCHR: DB NO ;yes=local command if EXTCHR precedes 117H
;no=external command if EXTCHR precedes
TOGGLELOC: DB YES ;yes=allow toggling of LOCONEXTCHR 118H
LSTTST: DB YES ;yes=allow toggling of printer on/off 119H
;
;
; Change the following to match the needs of the computer you will be
; to using terminal (T) (non-protocal)
;
XOFFTST: DB NO ;yes=checks for XOFF from remote while 11AH
;sending a file in terminal mode
XONWAIT: DB NO ;yes=wait for XON after CR while 11BH
;sending a file in terminal mode
;
;
TOGXOFF: DB YES ;yes=allow toggling of XOFF checking 11CH
IGNORCTL: DB YES ;yes=CTL-chars above ^M not displayed 11DH
EXTRA1: DB 0 ;for future expansion 11EH
EXTRA2: DB 0 ;for future expansion 11FH
BRKCHR: DB '@'-40H ;^@ = Send 300 ms. break tone 120H
NOCONNCT: DB 'N'-40H ;^N = Disconnect from the phone line 121H
LOGCHR: DB 'L'-40H ;^L = Send logon 122H
LSTCHR: DB 'P'-40H ;^P = Toggle printer 123H
UNSAVE: DB 'R'-40H ;^R = Close input text buffer 124H
TRANCHR: DB 'T'-40H ;^T = Transmit file to remote 125H
SAVECHR: DB 'Y'-40H ;^Y = Open input text buffer 126H
EXTCHR: DB 'U'-40H ;^^ = Send next character 127H
;
;
DS 2 ; 128H
;
IN$MODST1: CALL XSTATUS ! RET ;read status port 1 12AH
DS 6
OUT$MODDATP: CALL XOUTPUT ! RET ;write to output 134H
DS 6
IN$MODDATP: CALL XINPUT ! RET ;read from input 13EH
DS 6
ANI$MODRCVB: ANI MODRCVB ! RET ;bit to test for receive ready 148H
CPI$MODRCVR: CPI MODRCVR ! RET ;value of rcv. bit when ready 14BH
ANI$MODSNDB: ANI MODSNDB ! RET ;bit to test for send ready 14EH
CPI$MODSNDR: CPI MODSNDR ! RET ;value of send bit when ready 151H
DS 6 ; 156H
;
OUT$MODCTL1 JMP CONTRL1 ;write to control port #1 15AH
OUT$MODCTL2: JMP CONTRL2 ;write to control port #2 15DH
;
LOGONPTR: DW LOGON ;for user message. 160H
DS 6 ; 162H
JMP$GOODBYE: JMP GOODBYE ; 168H
JMP$INITMOD: JMP INITMOD ;go to user written routine 16BH
;
RET ! NOP ! NOP ; bypass PMII routine 16EH
RET ! NOP ! NOP ; bypass PMII routine 171H
RET ! NOP ! NOP ; bypass PMII routine 174H
;
JMP$SETUPR: JMP SETUPR ; 177H
JMP$SPCLMENU: JMP SPCLMENU ; 17AH
JMP$SYSVER: JMP SYSVER ; 17DH
JMP$BREAK: JMP SENDBRK ; 180H
;
;
; Do not change the following six lines.
;
JMP$ILPRT: DS 3 ; 183H
JMP$INBUF DS 3 ; 186H
JMP$INLNCOMP: DS 3 ; 189H
JMP$INMODEM DS 3 ; 18CH
JMP$NXTSCRN: DS 3 ; 18FH
JMP$TIMER DS 3 ; 192H
;
;
; Routine to clear to end of screen. If using CLREOS and CLRSCRN, set
; SCRNTEST to YES at 010AH (above).
;
CLREOS: CALL JMP$ILPRT ; 195H
DB ESC,'Y',0,0,0 ; 198H
RET ; 19DH
;
CLRSCRN: CALL JMP$ILPRT ; 19EH
DB CLS,0,0,0,0 ; 1A1H
RET ; 1A6H
;
SYSVER: CALL JMP$ILPRT ; 1A7H
DB CR,LF,'IBM PC With Baby Blue CP/M card'
DB CR,LF,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) if using the Hayes Smartmodem
; or by address 0C00H (2659 bytes) otherwise.
;
;-----------------------------------------------------------------------
;
; You can put in a message at this location which can be called up with
; CTL-O if TRANLOGON has been set TRUE. You can use several lines if
; desired. End with a 0
;
LOGON: DB 'Hello from an IBM-PC with Baby Blue CP/M Card'
DB CR,LF,0
;.....
;
;
; IBM-PC AUX PORT CONTROL PORT OUTPUT ROUTINES
;
CONTRL1: PUSH H
PUSH D
PUSH B
MOV E,A
LXI H,3FBH
MVI C,0FEH
CALL BDOS
POP B
POP D
POP H
RET
;.....
;
;
CONTRL2: PUSH H
PUSH D
PUSH B
MOV E,A
LXI H,3FCH
MVI C,0FEH
CALL BDOS
POP B
POP D
POP H
RET
;.....
;
;
XSTATUS: PUSH H
PUSH D
PUSH B
LXI H,MODST1
MVI C,0FFH
CALL BDOS
POP B
POP D
POP H
RET
;.....
;
;
XOUTPUT: PUSH H
PUSH D
PUSH B
MOV E,A
LXI H,MODDATP
MVI C,0FEH
CALL BDOS
POP B
POP D
POP H
RET
;.....
;
;
XINPUT: PUSH H
PUSH D
PUSH B
LXI H,MODDATP
MVI C,0FFH
CALL BDOS
POP B
POP D
POP H
RET
;.....
;
;
; This routine allows a 300 ms. break tone to be sent to reset some
; time-share computers.
;
SENDBRK: MVI A,43H ;send a break tone
CALL OUT$MODCTL1
JMP GOODBYE1
;.....
;
;
; Set DTR low for 300 ms. to disconnect some modems
;
GOODBYE: MVI A,0 ;turn off DTR
CALL OUT$MODCTL2
;
GOODBYE1: MVI B,3 ;wait for 300 ms.
CALL JMP$TIMER
MVI A,3 ;restore to normal, DTR on, 8 bits, etc.
CALL OUT$MODCTL1
MVI A,1
CALL OUT$MODCTL2
RET
;.....
;
;
; The following is the initialization routine for the IBM-PC with a Baby
; Blue Z-80 CPU:
;
;
INITMOD: LXI H,BD1200 ;set initial baud rate to 1200 baud.
JMP LOADBD
;.....
;
;
; Setup routine to allow changing modem speed with the set command.
;
SETUPR: LDAX D ;get input buffer length
INX D ;increment pointer past entered command
INX D ;increment pointer past entered command
INX D ;increment pointer past entered command
INX D ;increment pointer past entered command
INX D ;increment pointer past entered command
CPI 3 ;length of "set" command
JNZ SETUPX ;process entered speed
LXI D,BAUDBUF ;point to new input buffer
CALL JMP$ILPRT
DB 'Input Baud Rate (110,300,600,1200,2400,'
DB '4800,9600,19200): ',0
CALL JMP$INBUF
LXI D,BAUDBUF+2
;
SETUPX: CALL GETPOINT ;get pointer in 'B'
MOV A,B
CPI 0FFH
;
SET1: DB BNZ,SET2-SET1-2 AND 0FFH ;jmp if no error
CALL JMP$ILPRT
DB 'Bad Baud Rate Selection',CR,LF
DB 'Present Speed Unchanged.',CR,LF,LF,0
RET
;...
;
;
SET2: LXI H,BD110 ;get starting address of table
DAD B ;add offset
DAD B ;...
MOV A,C ;baud rate code
STA MSPEED ;save it for reference
;
LOADBD: PUSH H ;save pointer to divisor
MVI A,80H ;set flag to access divisor register
CALL OUT$MODCTL1
POP H
PUSH H
MOV E,M
LXI H,3F8H
MVI C,0FEH
CALL BDOS
POP H
INX H
MOV E,M
LXI H,3F9H
MVI D,0FEH
CALL BDOS
MVI A,3 ;set communications parameters..
CALL OUT$MODCTL1 ;..no parity, 8 bits
MVI A,1
CALL OUT$MODCTL2 ;enable dtr
RET
;.....
;
;
; Subroutine to get baud table entry number in 'B'
;
GETPOINT: LXI B,0 ;first entry=0
CALL JMP$INLNCOMP ;compare BAUDBUF+2 with characters below
DB '110',0
RNC ;go if got match
INX B ;first is entry 0
CALL JMP$INLNCOMP
DB '300',0
RNC ;go if got match
;
INX B
CALL JMP$INLNCOMP
DB '600',0
RNC ;go if got match
;
INX B
CALL JMP$INLNCOMP
DB '1200',0
RNC ;go if got match
;
INX B
CALL JMP$INLNCOMP
DB '2400',0
RNC ;go if got match
;
INX B
CALL JMP$INLNCOMP
DB '4800',0
RNC ;go if got match
;
INX B
CALL JMP$INLNCOMP
DB '9600',0
RNC ;go if got match
;
INX B
CALL JMP$INLNCOMP
DB '19200',0
RNC ;go if got match
;
MVI B,0FFH ;all matches failed
RET
;....
;
;
; Table of baudrate divisors
;
;
;
BD110: DW 1047
BD300: DW 384
BD600: DW 192
BD1200: DW 96
BD2400: DW 48
BD4800: DW 24
BD9600: DW 12
BD19200: DW 6
;
;
BAUDBUF: DB 10,0
DS 10
;.......
;
;
; If using the Hayes Smartmodem this is unavailable without a special
; change.
;
SPCLMENU: RET
;
;
; NOTE: MUST TERMINATE PRIOR TO 0400H (with Smartmodem)
; 0C00H (without Smartmodem)
;.....
;
END