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mxo-gb11.asm
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Assembly Source File
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1994-07-13
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13KB
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459 lines
title 'CompuPro overlay for Interfacer 3/4'
;
; MXO-GB11.ASM -- MEX Overlay file for the CompuPro I3/I4 & SS1. 06/16/84
;
; This overlay adapts the MEX modem program to the CompuPro Interfacer 3 or
; Interfacer 4 or System Support 1 serial cards using the 2651 USART chip.
;
;
; This overlay is capable of setting baud rate and setting port number
; (via the SET command), setting baud rate from the phone library, dis-
; connecting the modem, and sending a break.
;
REV EQU 11 ;V 1.1
;
; NOTE TO INTERFACER 4 USERS:
; The 'MIDDLE' serial port and the Centronics port can have their addresses
; changed using a hardware option. Godbout did this to maintain software
; compatibility with their bios. In order to prevent problems, use the
; 'RIGHT' serial port (RELATIVE USER 5) instead of the center serial
; port (RELATIVE USER 6). Also, read page 19 of the manual, the modem
; port will probably have to be set up in the 'MASTER MODE'. While
; you're reading the manual, read the section on 'WAIT STATE LOGIC'.
; I'm using a CPU-Z running at 6Mhz, with a 300 baud modem and two wait
; states (jumper at J7). Without them, I get 'o's for 'n's and 'g's
; for 'f's, and the checksums are never right. (AWW 12/20/83)
;
; Calling conventions for the various overlay entry points are detailed more
; fully in the PMMI overlay (MXO-PMxx.ASM, where xx=revision number)
;
; History as a MEX overlay
;
; 06/16/84 - Baud rate can now be automaticaly selected by MEX
; when making a call with CAL command. Also Baud rate
; is now correctly initialized. - Alex Soya
;
; 05/12/84 - SET port (0-7, S -- S=SS1) - Ron Fowler
; 05/11/84 - MEXified the overlay - Ron Fowler
;
; History as an MDM7 overlay
;
; 11/20/83 - Interfacer 4 note added - A.W. Warren
; 11/11/83 - Renamed to M7IN-1.ASM, no changes - Irv Hoff
; 07/27/83 - Renamed to work with MDM712 - Irv Hoff
; 07/11/83 - Modifed somewhat for MDM711 - Irv Hoff
; 07/08/83 - Adapted from MDM711GP.ASM - Paul Traina
;
;
; MEX service processor stuff
;
MEX EQU 0D00H ;address of the service processor
INMDM EQU 255 ;get char from port to A, CY=no more in 100 ms
TIMER EQU 254 ;delay 100ms * reg B
TMDINP EQU 253 ;B=# secs to wait for char, cy=no char
CHEKCC EQU 252 ;check for ^C from KBD, Z=present
SNDRDY EQU 251 ;test for modem-send ready
RCVRDY EQU 250 ;test for modem-receive ready
SNDCHR EQU 249 ;send a character to the modem (after sndrdy)
RCVCHR EQU 248 ;recv a char from modem (after rcvrdy)
LOOKUP EQU 247 ;table search: see CMDTBL comments for info
PARSFN EQU 246 ;parse filename from input stream
BDPARS EQU 245 ;parse baud-rate from input stream
SBLANK EQU 244 ;scan input stream to next non-blank
EVALA EQU 243 ;evaluate numeric from input stream
LKAHED EQU 242 ;get nxt char w/o removing from input
GNC EQU 241 ;get char from input, cy=1 if none
ILP EQU 240 ;inline print
DECOUT EQU 239 ;decimal output
PRBAUD EQU 238 ;print baud rate
;
PRINT EQU 9 ;BDOS/MEX print-string function call
;
BELL EQU 7 ;bell
TAB EQU 9
CR EQU 13 ;carriage return
LF EQU 10 ;linefeed
ESC EQU 1BH ;escape
YES EQU 0FFH
NO EQU 0
;
; Interfacer 3/4 and SS1 port equates
;
INBASE EQU 010H ;base port of CompuPro I3 or I4 card(s)
SSBASE EQU 05CH ;base of serial section of CompuPro SS1
;
UPORT EQU INBASE+7 ;user (chip select) port
;
; Port offsets
;
DPORT: EQU 0 ;data port
SPORT: EQU 1 ;status port
MPORT: EQU 2 ;mode port
CPORT: EQU 3 ;control port
;
TBMT: EQU 01H ;transmit buffer empty
DAV: EQU 02H ;data available
;
; Baud rate parameters
;
BD300: EQU 35H ;300 baud
BD600: EQU 36H ;600 baud
BD1200: EQU 37H ;1200 baud
BD4800: EQU 3CH ;4800 baud
BD9600: EQU 3EH ;9600 baud
BD19200 EQU 3FH ;19200 baud
;
ORG 100H
;
; Change the clock speed to suit your system
;
DS 3 ;(for "JMP START" instruction)
DB NO ;yes=PMMI S-100 Modem 103H
DB YES ;yes=HAYES Smartmodem, no=non-PMMI 104H
DB 'T' ;T=touch, P=pulse (Smartmodem-only) 105H
CLOCK: DB 60 ;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
COLUMS: DB 5 ;number of DIR columns shown 10AH
SETFLG: DB YES ;yes=user-added Setup routine 10BH
SCRTST: DB YES ;Cursor control routine 10CH
DB YES ;yes=resend a record after any non-ACK 10DH
;no=resend a record after a valid-NAK
BAKFLG: DB YES ;yes=change any file same name to .BAK 10EH
CRCDFL: DB NO ;yes=default to CRC checking 10FH
TOGCRC: DB YES ;yes=allow toggling of CRC to Checksum 110H
CVTBS: DB NO ;yes=convert backspace to rub 111H
TOGLBK: 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)
TOGLF: DB YES ;yes=allow toggling of LF after CR 114H
DB YES ;yes=allow transmission of logon 115H
;write logon sequence at location LOGON
SAVCCP: DB YES ;yes=do not overwrite CCP 116H
DB NO ;yes=local command if EXTCHR precedes 117H
;no=external command if EXTCHR precedes
DB YES ;yes=allow toggling of LOCONEXTCHR 118H
LSTTST: DB YES ;yes=printer available on printer port 119H
XOFTST: DB NO ;yes=checks for XOFF from remote while 11AH
;sending a file in terminal mode
XONWT: DB NO ;yes=wait for XON after CR while 11BH
;sending a file in terminal mode
TOGXOF: DB YES ;yes=allow toggling of XOFF checking 11CH
IGNCTL: DB NO ;yes=CTL-chars above ^M not displayed 11DH
EXTRA1: DB 0 ;for future expansion 11EH
EXITCHR DB 'E'-40H ;^E = Exit to main menu 11FH
BRKCHR: DB '@'-40H ;^@ = Send 300 ms. break tone 120H
NOCONN: 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
TRNCHR: DB 'T'-40H ;^T = Transmit file to remote 125H
SAVCHR: DB 'Y'-40H ;^Y = Open input text buffer 126H
EXTCHR: DB '^'-40H ;^^ = Send next character 127H
DS 2 ;unused by MEX 128H
;
INCTL1: JMP INSP ;go input status port 12AH
DS 7
;
OTDATA: JMP OUTDP ;go output data port 134H
DS 7
;
INPORT: JMP INDP ;go input data port 13EH
DS 7
;
MASKR: ANI DAV ! RET ;bit to test for receive ready 148H
TESTR: CPI DAV ! RET ;value of rcv. bit when ready 14BH
MASKS: ANI TBMT ! RET ;bit to test for send ready 14EH
TESTS: CPI TBMT ! RET ;value of send bit when ready 151H
DS 14 ; 156H
;
;
DS 3 ;DIALV: not done here (maybe MXO-SM) 162H
DISCV: JMP DISCON ;disconnect
GOODBV: JMP GOODBY ; 168H
INMODV: JMP NITMOD ;go to user written routine 16BH
NEWDBV: JMP PBAUD ;NEWBDV 16EH
RET ! NOP ! NOP ;NOPARV 171H
RET ! NOP ! NOP ;PARITV 174H
SETUPV: JMP SETCMD ; 177H
DS 3 ;not used by MEX 17AH
VERSNV: JMP SYSVER ; 17DH
BREAKV: JMP SBREAK ; 180H
;
; Do not change the following six lines (they provide access to routines
; in MEX that are present to support MDM7 overlays -- they will likely
; be gone by MEX v2.0).
;
ILPRTV: DS 3 ; 183H
INBUFV DS 3 ; 186H
ILCMPV: DS 3 ; 189H
INMDMV: DS 3 ; 18CH
DS 3 ; 18FH
TIMERV DS 3 ; 192H
;
; Routine to clear to end of screen. If using CLREOS and CLRSCRN, set
; SCRTEST to YES at 010AH (above).
;
CLREOS: LXI D,EOSMSG ; 195H
MVI C,PRINT
CALL MEX
RET
;
CLS: LXI D,CLSMSG ; 19EH
MVI C,PRINT
CALL MEX
RET
; 1A7H
;
; end of fixed area
;
SYSVER: MVI C,ILP ;in-line print
CALL MEX
DB 'Interfacer/SS1 V.'
DB REV/10+'0'
DB '.'
DB REV MOD 10+'0'
DB CR,LF,0
RET
;
; Routine to exit just prior to exit-to-cpm
;
GOODBY: RET ;not done here
;
; Send break to remote
;
SBREAK: MVI A,2FH ;send break for 300ms
JMP DISC1
;
; Disconnect the modem
;
DISCON: XRA A ;turn off DTR
DISC1: PUSH PSW
CALL STPORT ;select port
POP PSW
CALL OUTCP ;send passed byte to CPORT
MVI B,3 ;turn off DTR for 300 ms.
MVI C,TIMER
CALL MEX
MVI A,27H ;turn DTR back on
CALL OUTCP
RET
;
; Initialize the port; either set an initial baud rate, or (if
; your system is capable of it) query the current rate and set
; MSPEED value. We can do neither here, so we assume a value
; for MSPEED -- if it's not the current value, the user must
; execute a SET command to bring MSPEED into agreement with the
; current baud rate.
;
NITMOD: MVI A,5
STA MSPEED
CALL PBAUD
RET
;
; SET command: select baud rate, port number. Port number may be any of
; 0,1,2,3,4,5,6,7,S (S=SS1), baud rate any of 300, 600, 1200, 4800
; 9600, 19200. Special set-port syntax allows baud rate after port
; number. Examples:
;
; SET PORT 3
; SET PORT 5 1200
; SET PORT S 300
; SET BAUD 9600
;
SETCMD: MVI C,SBLANK ;any arguments?
CALL MEX
JC TELL ;if not, go display port/baud
LXI D,CMDTBL
MVI C,LOOKUP
CALL MEX ;parse argument
PUSH H ;save any parsed argument adrs on stack
RNC ;if we have one, return to it
POP H ;oops, input not found in table
SETERR: MVI C,ILP ;inline print
CALL MEX
DB CR,LF,'SET command error',CR,LF,0
RET
;
; Argument table
;
CMDTBL: DB '?'+80H ;help
DW STHELP
DB 'BAU','D'+80H ;"set baud"
DW STBAUD
DB 'POR','T'+80H ;"set port"
DW SETPOR
DB 0 ;<<=== table terminator
;
; "SET ?" processor
;
STHELP: MVI C,ILP ;inline print
CALL MEX
DB CR,LF,'SET BAUD <rate>'
DB CR,LF,'SET PORT <port-number>'
DB CR,LF
DB CR,LF,'Baud rate is one of:'
DB CR,LF,' 300 600 1200 4800 9600 19200'
DB CR,LF,'Port number is one of:'
DB CR,LF,' 0-7 : interfacer 3 or 4 port number'
DB CR,LF,' S : System Support I serial port'
DB CR,LF,0
RET
;
; "SET BAUD" processor
;
STBAUD: MVI C,BDPARS ;function code: parse a baudrate
CALL MEX ;let MEX look up code
JC SETERR ;jump if invalid code
CALL PBAUD ;no, try to set it
JC SETERR ;if not one of ours, bomb out
BDSHOW: MVI C,ILP ;inline print
CALL MEX ;display baud
DB 'Baud: ',0
LDA MSPEED ;get current baud rate
MVI C,PRBAUD ;let MEX print it
CALL MEX
RET
;
; SET PORT processor
;
SETPOR: MVI C,SBLANK ;scan to argument
CALL MEX
JC SETERR ;if no arg, bomb out
MVI C,GNC ;else consume it
CALL MEX
CPI 'S' ;SS1?
JZ SETSS1 ;jump if so
CPI 's'
JZ SETSS1
SUI '0' ;convert
JC SETERR
CPI 7+1
JNC SETERR
JMP SETX ;go put away port #
SETSS1: MVI A,0FFH ;SS1 token
SETX: STA PORT
MVI C,SBLANK ;any thing more?
CALL MEX
JNC STBAUD ;if so, go parse as baud rate
;
TELL: MVI C,ILP
CALL MEX
DB CR,LF,'Port: ',0
LDA PORT
CPI 0FFH ;SS1?
JNZ TELL1 ;jump if not
MVI A,'S'-'0' ;set SS1, and avoid a JMP
TELL1: ADI '0' ;get port # in ASCII
STA PORTAS
MVI C,ILP
CALL MEX
PORTAS: DB ' ',0
JMP BDSHOW
;
; This routine sets baud rate passed as MSPEED code in A.
; Returns CY=1 if baud rate not supported (if supported,
; this routine must set the new MSPEED code).
;
PBAUD: PUSH H ;don't alter anybody
PUSH D
PUSH B
MOV E,A ;MSPEED code to DE
MVI D,0
LXI H,BAUDTB ;offset into table
DAD D
MOV A,M ;fetch code
ORA A ;0? (means unsupported code)
STC ;prep carry in case unsupported
JZ PBEXIT ;exit if bad
PUSH PSW ;no, set the rate
MVI A,04EH ;first, set 8 bits, no parity, 1 stop
CALL OUTMP
POP PSW ;get baud code back
CALL OUTMP
MVI A,27H ;turn on DTR, etc
CALL OUTCP
MOV A,E ;get MSPEED code back
STA MSPEED ;set it
ORA A ;return no-errors
PBEXIT: POP B
POP D
POP H
RET
;
BAUDTB: DB 0 ;110 (not supported)
DB BD300 ;300
DB 0 ;450 (not supported)
DB BD600 ;600
DB 0 ;710 (not supported)
DB BD1200 ;1200
DB 0 ;2400 (not supported)
DB BD4800 ;4800
DB BD9600 ;9600
DB BD19200 ;19200
;
; Port access routines
;
; Input
;
INSP: MVI A,SPORT ;in status-port
JMP INP1
INDP: MVI A,DPORT ;in data-port
INP1: PUSH B ;can't alter BC
MOV C,A ;2661-relative port number in C
CALL STPORT ;set port #
ADD C ;A=absolute port #
POP B ;restore BC
STA INP2+1 ;put port # in the code
INP2: IN 0 ;do the input
RET
;
; Output
;
OUTDP: PUSH B ;out data-port
MVI C,DPORT
JMP OUT1
OUTMP: PUSH B ;out mport
MVI C,MPORT
JMP OUT1
OUTCP: PUSH B ;out control port
MVI C,CPORT
OUT1: MOV B,A ;B=char to send
CALL STPORT ;set port #
ADD C ;A=absolute port #
STA OUT2+1 ;put port # in the code
MOV A,B ;A=char to send
OUT2: OUT 0 ;send it
POP B
RET
;
; Set port #, return base adrs
;
STPORT: LDA PORT ;get current port #
CPI 0FFH ;255 implies SS1
JNZ STIN ;jump if not SS1
MVI A,SSBASE ;it's SS1, return base adrs
RET
STIN: OUT UPORT ;set IN 3/4 user #
MVI A,INBASE ;return base port
RET
;
;
PORT: DB 6 ;initial port #=ss1
;
; Clear-to-end-of-screen and clear-screen sequences
;
EOSMSG: DB ESC,'T','$'
CLSMSG: DB 26,'$'
;
;
END