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m7px-1.aqm
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M7PX-1.ASM
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Assembly Source File
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1985-02-09
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13KB
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387 lines
; M7PX-1.ASM -- Epson PX-8 overlay file for MDM7xx. 10/24/84 <pms>
;
;
; This overlay file supports the EPSON PX-8 "Geneva" microcomputer.
;It was derived from the M7VT-2 file that supports the DEC VT180,
;Rainbow and DECmate II computers with CP/M.
;
; It uses the RS232c port of the Epson PX-8. Baud-rates must be set
;prior to using the program with the vendor-supplied "CONFIG.COM"
;program. Since the RS-232C port is I/O-wise Reader/Punch, it uses
;the BDOS calls to those devices.
;
; To test for COMM-status, it uses I/O byte redirection in conjunction
;with a direct BIOS-CONSTAT call.
;
; This technique, although a little bit slower than direct port I/O
;using Interrupt on INPUT, is general enough to be system independent.
;It may be used on most microcomputers once the I/O byte is decoded.
;
; Many thanks for this technique to:
;
; - B. Eiben DEC Large System Marketing Marlboro Mass
;
; How to get it onto your EPSON PX-8
;
; The vendor-supplied "TERM.COM" program will allow for ASCII text
;file transfer without any error checking. I had a marked degree of
;success in getting stuff onto the EPSON PX-8 computer by first changing
;the .COM files into the INTEL HEX format using UNLOAD.COM from the
;CP/M user group disk xx. I then used MODEM7 to send the INTEL HEX
;format file to the Epson PX-8 from my machine. Since the screen display
;on the PX-8 is a little slower than 1200 baud, and since TERM wants to
;display all received characters, insert a 200 millisecond delay after
;each carriage return on the sending machine. Once the .HEX file was
;sent to the EPSON, I used the LOAD.COM (supplied with the EPSON PF-10
;floppy drive) to reconstitute the .COM file.
;
; According to the information in the manuals for the Epson PX-8, the
;UART is described as the 82C51. I was unable to find the port addresses
;in any of the documentation that I had, and SURVEY showed me 111 active
;ports. If you wish to set up a fancier version with baud rate setting
;etc. built in, it would seem that the place to start might be the Datapoint,
;NorthStar, Vector, or Intertec overlays as those use the 8251 UART.
;
; Hope you enjoy it!
;
; Paul M. Sittler
; Department of Veterinary Public Health
; College of Veterinary Medicine
; Texas A&M University
; College Station, TX 77843-4468
; VPH RBBS/RCPM (409) 845-0509 24 Hours @ 300/1200 baud.
;
;
;***********************************************************************
;
; 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 places particular emphasis on using
; an external modem that does not match one of the other special
; overlays. You would use the normal CP/M "CONFIG.COM" program to
; set the RS-232C port to whatever baud rate you would normally use
; such as 300 or 1200, etc.)
;
; You could look at other overlay files to see how the GOODBYE
; and/or SETUPR areas are handled. You could then adapt one of
; those, if appropriate, for your equipment in this overlay. Some
; examples:
;
; "DP" Datapoint 1560 overlay using 8251 I/O and CTC timers for
; setting baud rates
; "H8" Heath H89 overlay for 8250 I/O and programmable baud rates
; "HZ" Zenith 120 overlay for 2661B initialization and baud rates
; "XE" Xerox 820II overlay for Z80-SIO intialization, etc.
;
; 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. Assemble with ASM.COM or equivalent
; assembler. Then. use DDT to overlay the the results
; of this program to the original .COM file:
;
; A>DDT
; DDT VERS 2.2
; NEXT PC
; 0100 0100
; F100 C000 00 (fill memory from 100 to C000
; -IMDM7xx.COM with zeros for housekeeping)
; -RMDM7xx.COM
; NEXT PC
; 4A00 0100
; -IM7PX-1.HEX (note the "I" command)
; -R ("R" loads in the .HEX file)
; NEXT PC
; 4A00 0000
; -G0 (return to CP/M)
;
; A>SAVE 73 MDM7xx.COM (now have a modified .COM file)
;
; = = = = = = = = = = = = = = = = = =
;
; 10/23/84 - Revised to work with Epson PX-8 - Paul M. Sittler
; 11/24/83 - Changed to add Rainbow and Decmate - B.G.E.
; 11/11/83 - Renamed to M7VT-1.ASM, no changes - Irv Hoff
; 08/09/83 - Revised to work with a VT180 - Michael Gwilliam
; 04/04/83 - First version of this file - Irv Hoff
;
; = = = = = = = = = = = = = = = = =
;
BELL: EQU 07H ;bell
CR: EQU 0DH ;carriage return
ESC: EQU 1BH ;escape
LF: EQU 0AH ;linefeed
;
TRUE: EQU 0FFH
FALSE: EQU 0
YES: EQU 0FFH
NO: EQU 0
;
;
; Change the following information to match your equipment
;
EPSNPX EQU TRUE ;For EPSON PX-8 Computer
;
BDOS: EQU 0005 ;address of BDOS entry
PUNCH: EQU 4 ;punch function
READER: EQU 3 ;reader function
MODDCDB: EQU 0FFH ;carrier detect bit
MODDCDA: EQU 0FFH ;value when active
MODRCVB: EQU 0FFH ;bit to test for receive
MODRCVR: EQU 0FFH ;value when ready
MODSNDB: EQU 0FFH ;bit to test for send
MODSNDR: EQU 0FFH ;value when ready
;
;
ORG 100H
;
;
; Change the clock speed to suit your system
;
DS 3 ;(for "JMP START" instruction)
;
PMMIMODEM: DB NO ;yes=PMMI S-100 Modem 103H
SMARTMODEM: DB YES ;yes=HAYES Smartmodem, no=non-PMMI 104H
TOUCHPULSE: DB 'T' ;T=touch, P=pulse (Smartmodem-only) 105H
CLOCK: DB 01 ;clock speed in MHz x10, 25.5 MHz max. 106H
;20=2 MHh, 37=3.68 MHz, 40=4 MHz, etc.
;When EPSON PX8 CLOCK is set to 100 KHZ it
;times out in 14.4 second intervals. <pms>
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 3 ;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 3 ;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 NO ;yes=user-added Setup routine 10BH
SCRNTEST: DB no ;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
BADDLF: 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=printer available on printer port 119H
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 NO ;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 '^'-40H ;^^ = Send next character 127H
;changed to be closer to KERMIT (B.G.E)
;
;
DS 2 ; 128H
;
IN$MODCTL1: JMP INCTL ;in modem control port 12AH
DS 7
OUT$MODDATP: JMP OUTDATA ;out modem data port 134H
DS 7
IN$MODDATP: JMP INDATA ;in modem data port 13EH
DS 7
ANI$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: MVI A,MODSNDB ! RET ;bit to test for send ready 14EH
CPI$MODSNDR: CPI MODSNDR ! RET ;value of send bit when ready 151H
DS 6 ;Together these do nothing 156H
;
OUT$MODCTL1: RET ! NOP ! NOP ;out modem control port #2 15AH
OUT$MODCTL2: RET ! NOP ! NOP ;out modem control port #1 15DH
;
LOGONPTR: DW LOGON ;for user message. 160H
DS 6 ; 162H
JMP$GOODBYE: JMP GOODBYE ; 168H
JMP$INITMOD: JMP INITMOD ;go to user written routine 16BH
RET ! NOP ! NOP ;(by-passes PMMI routine) 16EH
RET ! NOP ! NOP ;(by-passes PMMI routine) 171H
RET ! NOP ! NOP ;(by-passes PMMI routine) 174H
JMP$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 0,0,0,0,0 ; 198H
RET ; 19DH
;
CLRSCRN: JMP JMP$ILPRT ; 19EH
DB 0,0,0,0,0 ; 1A1H
RET ; 1A6H
;
SYSVER: CALL JMP$ILPRT ; 1A7H
DB 'Version for Epson PX-8'
DB CR,LF
DB 'RS-232c port with external modem'
DB CR,LF,0
RET
;.....
;
;
; Modem I/O primitive
;
; Subroutine to output a character to the modem.
; This routine does it's own status checking.
;
OUTDATA: PUSH B ;save...
PUSH D ;...the...
PUSH H ;...registers.
MOV E,A ;move output byte into E
MVI C,PUNCH ;use the BDOS function
CALL BDOS ;go
POP H ;restore...
POP D ;...the...
POP B ;...registers.
RET
;.....
;
;
; Subroutine to input a character from the modem.
; This routine will wait until one becomes available.
;
INDATA: PUSH B ;save...
PUSH D ;...the...
PUSH H ;...registers.
MVI C,READER ;use the BDOS function
CALL BDOS ;go
POP H ;restore...
POP D ;...the...
POP B ;...registers.
RET
;.....
;
; The Check for characters at COMM-Port using I/O redirection
;
IOBYTE EQU 3 ; some definitions
DEFIO EQU 0A9H ; the standard setting
BATIO EQU 6AH ; for the Epson PX-8
INCTL: PUSH B
PUSH D
PUSH H ; save the environment
MVI A,BATIO ; change I/O byte
STA IOBYTE
CALL BCONST ; call BIOS direct - see INITMOD
PUSH A
MVI A,DEFIO ; change I/O byte back
STA IOBYTE
POP A
POP H ; restore environment
POP D
POP B
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 'Howdy from an EPSON PX-8 computer!',CR,LF,0
;.....
;
;
; Add your own routine here to send a break tone to reset some time-share
; computers, if desired.
;
SENDBRK: RET
;.....
;
;
; Add your own routine here to put DTR low and/or send a break tone.
; Check other routines such as MDM709DP.ASM which is using this feature.
;
GOODBYE: RET
;.....
;
;
; You can use this area for any special initialization or setup you may
; wish to include. Each must stop with a RET. You can check the other
; available overlays for ideas how to write your own routines if that
; may be of some help.
;
INITMOD: LHLD 1 ; Get BIOS Jump-table adress
LXI D,3
DAD D ; CONSTAT routine in BIOS
SHLD BCONST+1 ; modify our "routine"
RET
;
BCONST: JMP $-$ ; address "filled in" by above code
;
SETUPR: RET
;
;
; 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
;
0H (with Smartmodem)
; 0C00H (wit