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m7vio-2.asm
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Assembly Source File
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1994-07-13
|
18KB
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512 lines
; M7VIO-2.ASM -- Ithaca VIO w/ 2651 overlay. 06/30/85.
;
; Replaces M7VIO-1.ASM and supports the SET command at 2400 Baud.
; It starts out at 1200 baud when the program is first called up.
; Tested with the Hayes Smartmodem 1200 and US Robotics Courier 2400.
;
; One small problem surfaced. When calling with the Courier at 2400,
; if the other end answers at 1200, the Courier resets to 1200 and
; expects you to do the same with the UART. That code was not added
; here and if it happens to you, the simplest recovery is to get out
; of MODEM and start over.
;
; 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>DDT MDM729.COM
; DDT VERS 2.2
; NEXT PC
; 4A00 0100
; -IM7VIO-1.HEX (note the "I" command)
; -R ("R" loads in the .HEX file)
; NEXT PC
; 4A00 0000 (MDM729 is 73 sectors)
; -G0 (return to CP/M)
; A>SAVE 73 MODEM.COM (now have a modified .COM file)
;
; = = = = = = = = = = = = = = = = = =
;
; 06/30/85 - Added 2400 Baud support - Dave Crane
; 03/24/84 - Added SMODEM commands - Dave Crane
; 09/18/83 - MDM711HZ modified for Ithaca VIO+2651 - Dave Crane
; 07/01/83 - Revised to work with MDM711 - Irv Hoff
; 06/22/83 - Revised to work with MDM710 - Irv Hoff
; 05/27/83 - Revised to work with MDM709 - Irv Hoff
; 05/15/83 - Revised to work with MDM708 - Irv Hoff
; 04/11/83 - Updated to work with MDM707 - Irv Hoff
; 04/04/83 - Updated to work with MDM706 - Irv Hoff
; 02/27/83 - Updated to work with MDM705 - Irv Hoff
; 02/17/83 - Modified MDM703CF to work with
; Heath/Zenith -100 series com-
; puters with 2661B I/O - Irv Hoff
;
; = = = = = = = = = = = = = = = = =
;
BELL: EQU 07H ;bell
CR: EQU 0DH ;carriage return
ESC: EQU 1BH ;escape
LF: EQU 0AH ;linefeed
;
YES: EQU 0FFH
NO: EQU 0
;
; Modem cable assumed set up as follows:
;
; Modem Ithaca VIO board Function
; 2 3 TXD -> RXD
; 3 2 RXD <- TXD
; 4-\ RTS -\ (jumpered)
; 5-/ CTS -/ (together)
; 8 20 Carrier=DCD -> DSR
; 7 7 Ground -- Ground
; 22 22 RI -> not used
; 20 8 DTR <- DTR
;
; Be certain the 2651 pin 16 (DCD) is tied to ground. If it floats, the
; chip will never indicate data available. This was a flaw in several
; Rev/B boards tested, even though the documentation indicates Rev/B fixed
; the problem.
;
; This diagram and logic also applies to BYEII and XMODEM but note that data-
; set ready, not the ring indicator, is the signal that a call is coming in.
; SmartModem switches are assumed to be UUDU DUUD for BYE. XMODEM doesn't care.
; USR Courier 2400 switches are assumed UUDD DUDD DU; it will work with the
; same switch settings as the Hayes 1200.
;
; DCC 3/26/84
;
;=======================================================================
;
MODDATP: EQU 20H ;BASE PORT = Data Port
MODSTAT: EQU MODDATP+1 ;STATUS PORT
MODMODE: EQU MODDATP+2 ;MODE PORT
MODCTLP: EQU MODDATP+3 ;CONTROL PORT
BASEP EQU MODDATP ;Base port for Intersystems VIO
DPORT EQU BASEP ;Modem data port
SPORT EQU BASEP+1 ;Modem status port
MPORT EQU BASEP+2 ;Modem mode select port
CPORT EQU BASEP+3 ;Modem control port
;
; Modem status port equates
;
TBMT EQU 00000001b ;Transmit buffer empty
DAV EQU 00000010b ;Data available
PE EQU 00001000b ;Parity error
OE EQU 00010000b ;Overrun error
FE EQU 00100000b ;Framing error
DCD EQU 01000000b ;Carrier detect
RDET EQU 10000000b ;Ring detect
; (In this configuration RDET is actually data set ready)
;
; Mode port equates
;
E8NO1 EQU 01001110b ;8 data bits, no p, 1 stop, 16x rate
EBASE EQU 00110000b ;Mode register 2 base
B110 EQU EBASE+2 ;110 baud (not implemented)
B300 EQU EBASE+5 ;300 baud
B600 EQU EBASE+6 ;600 baud (not implemented)
B1200 EQU EBASE+7 ;1200 baud
B2400 EQU EBASE+10 ;2400 baud
B4800 EQU EBASE+12 ;4800 baud (not implemented)
B9600 EQU EBASE+14 ;9600 Baud
;
; Command port equates
;
CBASE EQU 00000101b ;Command base
RISET EQU 00010000b ;Reset errors
DTR EQU 00000010b ;Turn on DTR
RTS EQU 00100000b ;Turn on RTS
;
ORG 100H
;
DS 3 ;(for "JMP START" instruction)
;
PMMIMODEM: DB NO ;yes=PMMI S-100 Modem 103H
SMARTMODEM: DB YES ;yes=HAYES Smartmodem, no=non-Hayes 104H
TOUCHPULSE: DB 'T' ;T=touch, P=pulse (Smartmodem-only) 105H
;
CLOCK: DB 57 ;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 NO ;Cursor control routine 10CH
NORETRY: DB YES ;yes=resend a record after any non-ACK 10DH
;no=resend a record after a valid NAK
BAKUPBYTE: DB YES ;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 NO ;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 NO ;yes=printer available on printer port 119H
XOFFTST: DB YES ;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 a 300 ms. break tone 120H
NOCONNCT: DB 'N'-40H ;^N = Disconnect from the phone line 121H
LOGCHR: DB 'O'-40H ;^O = 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 125H
EXTCHR: DB '^'-40H ;^^ = Send next character 126H
;
DS 2 ; 128H
;
IN$MODSTAT: IN MODSTAT ! RET ;in modem status port 12AH
DS 7
OUT$MODDATP: OUT MODDATP ! RET ;out modem data port 134H
DS 7
IN$MODDATP: IN MODDATP ! RET ;in modem data port 13EH
;---> DS 31
DS 7
;--->
;
ANI$MODRCVB: ANI DAV ! RET ;bit to test for receive ready 148H
CPI$MODRCVR: CPI DAV ! RET ;value of rcv. bit when ready 14BH
ANI$MODSNDB: ANI TBMT ! RET ;bit to test for send ready 14EH
CPI$MODSNDR: CPI TBMT ! RET ;value of send bit when ready 151H
DS 6 ; 156H
OUT$MODCTL1: OUT MODCTLP ! RET ;out modem control port #2 15AH
OUT$MODCTL2: OUT MODCTLP ! RET ;out modem control port #1 15DH
;
;--->
;
LOGONPTR: DW LOGON ;for user message. 160H
DS 6 ; 162H
JMP$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$TIMER: DS 3 ; 192H
;
; TVI, Lear Siegler, etc.
;
CLREOS: CALL JMP$ILPRT ; 195H
DB ESC,79H,0,0,0 ; 198H
RET ; 19DH
;
CLRSCRN: CALL JMP$ILPRT ; 19EH
DB ESC,3AH,0,0,0 ;CLEAR ENTIRE SCREEN 1A1H
RET ; 1A6H
;
;
SYSVER: CALL JMP$ILPRT ; 1A7H
DB 'Version for Ithaca VIO/2651 at port 20H'
DB CR,LF,0
DB 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 available) otherwise.
;
;-----------------------------------------------------------------------
;
; You can put in a message at this location which can be called up with
; CTL-O if TRANLOGON has been set YES. You can put in several lines if
; desired. End with a 0.
;
LOGON: DB 'DAVE;CRANE',CR,LF,0
;.....
;
; This routine allows a 300 ms. break tone to be sent to reset some
; time-share computers.
;
SENDBRK: MVI A,3DH ;SEND A BREAK TONE FOR 300 MS.
MVI B,3 ;DELAY FOR 300 MS.
CALL JMP$TIMER
MVI A,CBASE+RISET+DTR+RTS
OUT MODCTLP ;Xmit, Recv, DTR, RTS on, reset.
IN MODDATP ;CLEAR ANY INCOMING CHARS.
IN MODDATP ;TRY ONCE MORE
RET
;
; This routine sends a 300 ms. break tone and sets DTR low for the same
; length of time to disconnect some modems such as the Bell 212A, etc.
;
GOODBYE: CALL SENDBRK ;SEND 300MS BREAK TONE
MVI A,CBASE ;SET BREAK, DTR & RTS LOW
OUT MODCTLP ;PUT COMMAND REGISTER OUT OF MODE
MVI B,3 ;DELAY FOR 300 MS.
CALL JMP$TIMER
MVI A,CBASE+RISET+DTR+RTS
OUT MODCTLP ;SEND TO COMMAND REGISTER
IN MODDATP ;CLEAR ANY INCOMING CHARS.
IN MODDATP ;TRY ONCE MORE
XRA A ;CLEAR THE 'A' REG.
RET
;
; The following are used in setting up the 2651 I/O port.
;
INITMOD: MVI A,5 ;START WITH 1200 BAUD
STA MSPEED ;DEFAULT TRANSFER TIME
IN MODCTLP ;Clear/Reset Mode toggle on port
MVI A,E8NO1 ;1 STOP, NO PARITY, 8 BITS, ASYNC 16X
OUT MODMODE ;SEND TO MODE REGISTER 1
INITMOD1: MVI A,B1200 ;START WITH 1200 BAUD
OUT MODMODE ;SEND TO MODE REGISTER 2
MVI A,CBASE+RISET+DTR+RTS
;RESET RTS, FLAGS, DTR LOW, ENABLE R/T
OUT MODCTLP ;SEND TO COMMAND REGISTER
CALL SMINIT ;Reinitialize the SmartModem to this rate.
RET
;.....
;
; The following changes the baud rate with the SET command.
;
SETUPR: LXI D,BAUDBUF
CALL JMP$ILPRT
DB 'Input Baud Rate (300, 1200, 2400, 9600): ',0
CALL JMP$INBUF
LXI D,BAUDBUF+2
CALL JMP$INLNCOMP ;COMPARE BAUDBUF+2 WITH CHARACTERS BELOW
DB '300',0
JNC OK300 ;GO IF GOT MATCH
CALL JMP$INLNCOMP
DB '1200',0
JNC OK1200
CALL JMP$INLNCOMP
DB '2400',0
JNC OK2400
CALL JMP$INLNCOMP
DB '4800',0
JNC OK4800
CALL JMP$INLNCOMP
DB '9600',0
JNC OK9600
CALL JMP$ILPRT ;ALL MATCHES FAILED, ASK AGAIN
DB '++ Incorrect entry ++',CR,LF,BELL,0
JMP SETUPR ;TRY AGAIN
;
OK300: MVI A,1
LHLD BD300
JMP LOADBD
;
OK1200: MVI A,5
LHLD BD1200
JMP LOADBD
;
OK2400: MVI A,6
LHLD BD2400
JMP LOADBD
;
OK4800: MVI A,6 ;See comments after next Baud rate:
LHLD BD4800
JMP LOADBD
;
OK9600: MVI A,6 ;Obviously this won't work with a slower
LHLD BD9600 ; modem. It's intended for null modems.
JMP LOADBD
;
LOADBD: STA INITMOD+1 ;Store in INITMOD instruction
MOV A,L ;get least significant baud rate byte
STA INITMOD1+1 ;store in INITMOD1
JMP INITMOD ;reset 2651
;.....
;
; TABLE OF BAUDRATE PARAMETERS FOR 2651 I/O
;
BD110 DB EBASE+2 ; 110 BAUD
BD300 DB EBASE+5 ; 300 BAUD
BD1200 DB EBASE+7 ;1200 BAUD
BD2400 DB EBASE+10 ;2400 BAUD
BD4800 DB EBASE+14 ;4800 BAUD
BD9600 DB EBASE+14 ;9600 BAUD
;
BAUDBUF: DB 10,0
DS 10
;
;
SPCLMENU: RET ; Not used
; NOTE: MUST TERMINATE PRIOR TO 0400H (with Smartmodem)
; 0C00H (without Smartmodem)
;
; D.C. Hayes Smartmodem 300/1200 'Modem Control'
; From: BY2+SMDM.ASM by Don Brown
; Version 1.1 04/24/83
; Mods: Dave Crane, Dallas RCP/M
;
; These routines may be used along with the more specific modem/
; serial port/baud rate routines commonly found in BY2-MOD.LBR.
;
; The following Smartmodem Default switches are assumed:
; A. Switches 'Not' configurable by Software Control:
; 1=Up, DTR supported, do Not force to always logic true.
; 6=Up, DCD supported, do Not force to always logic true.
; 7=Up, Single Line RJ11 Telephone connection to Smartmodem.
; 8=Down, Enables modem command recognition, when in Command State.
; B. Switches 'configurable' by Software Control:
; 2=Up, Send English result codes when in Command State.
; 3=Down, Result Codes are sent to the Terminal.
; 4=Down, Do not echo characters when in Command State.
; 5=Down, Do not answer the telephone.
;
; The USR Courier 2400 switches are almost identical to the Hayes 1200.
; We run the RCP/M with 1,2,6, and 10 UP and the rest DOWN (except "11").
;
; Notes:
; USR Courier will automatically set itself to the speed of the
; calling modem, provided the speed is 300 -> 2400 baud. This
; relieves us of the need to set the modem (still have to check and
; set the USART/baud), via software instructions. 110 baud is not
; supported because Smartmodem cannot differentiate between 110-300
; baud and will not set itself automatically.
;
; Code causes DTR to go false in order to Hang-Up the phone. When
; DTR goes false, smartmodem will automatically drop the line and go
; to Local Command State. However, DTR must be true for Smartmodem
; to receive and execute commands. Further, when you turn DTR on, for
; this purpose, Smartmodem is still set at the Baud rate of the last
; call and is still in auto answer mode. If the telephone is ringing
; when DTR goes true and the number of rings stored in smartmodem
; register S0 is 1 (and possibly even 2), there may not be enough time
; to send the first command string before smartmodem goes off the hook
; into a carrier wait state. If you send any characters to smartmodem
; during this carrier wait state (before it has recognizes an incoming
; carrier and goes On Line), the smartmodem will hang-up the line and
; return to local command state. Also, all characters received by it,
; after this first key character (ie. the 'A' of the required 'AT..'),
; after in local command state, will be received as random data and
; may confuse smartmodem's baud rate detector and command decoder,
; leaving smartmodem in an unpredictable state (which may keep your
; system down till you manually reset it). If the command string is
; sent after smartmodem has recognized carrier and gone on line, it
; goes out the modem port to the calling modem as data (garbage).
; Consequently, it is extremely important that smartmodem register S0
; be set to at least 3 if not 4 rings and the smartmodem command string
; 'ATZ' be executed immediately after DTR is set true!!
;
; The first command string sent to smartmodem ie. 'ATZ', will set the
; smartmodem baud rate to the speed at which it was sent (the speed or
; baud of your USART which was just set in the initialization routines).
; This command will also cause the Smartmodem to do its own software
; reset (return to default switch settings). Note that switch 5 is
; down so that modem does Not default to auto Answer. We set auto
; when we're ready, with the second command string we send.
;
; The Smartmodem needs at least 250msecs. delay between commands, in
; order to execute the command and be ready to receive the next command
; or between data and a command (sometimes longer).
;
; Initialize the Smartmodem.
; DTR must be logic true for Smartmodem to receive and process a command.
; The S0 modem register setting should not be less than 2 and should be the
; last command in the command string.
;
PSPEED: EQU 6 ;Processor speed - MHz
;
SMINIT:
CALL MDMRST ;Reset with 'ATZ'
CALL SMDELAY ;One second delay needed by Smartmodem
CALL SMSEND ;Initialize Smartmodem
DB 'ATQ1E0M1S2=128S7=11S9=6S10=60S0=255',CR,0
CALL SMDELAY ;One second delay needed by Smartmodem
RET ;Return
;
; Initialize the SmartModem to virgin state
;
MDMRST:
CALL SMSEND
DB 'ATZ',CR,0 ; set SmardModem to no auto answer
RET
;
; Let the Smartmodem have one second before receiving a command.
; ie. one second to process a Command or before any other data
; is sent to it. DTR must be On for Smartmodem to receive and process
; a command when it is local command state.
;
SMDELAY:
PUSH B ;Preserve in case it's in use elsewhere
MVI B,10 ;Wait one second
DLP1:
CALL DELAY
DCR B
JNZ DLP1 ;Keep looping till done
POP B ;Done, restore BC
RET ;Return
;
; Send the Command String to the Smartmodem
; Similiar to how ILPRT sends to console
;
SMSEND:
XTHL ;Save HL, get address of message
PUSH B ;Save BC
;
SMPLP:
IN SPORT ;Get modem output status
ANI TBMT ;mask junk
JZ SMPLP ;Not ready to send yet...
MOV A,M ;Ready, get the character..
OUT DPORT ;Send the character
INX H ;Point to next character
MOV A,M ;Get next character
ORA A ;Delimiter ? All sent ?
JNZ SMPLP ;..No, go send another
POP B ;..Yes, restore BC
XTHL ;...restore HL, get return Address
RET ;Return
;
;.1 sec delay routine
;
DELAY:
PUSH B
LXI B,417*PSPEED ;timing constant * speed in MHz
;
DELAY1:
DCX B
MOV A,B
ORA C
JNZ DELAY1
POP B
RET
;
END
LXI B,417*PSPEED ;timing constant * speed in MHz
;
DELAY1:
DCX B
MOV A,B
ORA C
JNZ