; MXO-NA1.ASM -- North Star Advantage overlay for MEX - 84/11/26 ; ; Edit this file for your preferences then follow the "TO USE:" example ; shown below. ; ; Use the MEX "SET" command to change the baudrate when desired. Use ; "SET" to see the current baud rate and "SET xxxx" to set to xxxx. It ; starts out at the value selected from the "DBDRTx" equates. ; ; ; TO USE: First edit this file filling in answers for your own ; equipment. Then assemble with ASM.COM or equivalent ; assembler. Then use MLOAD to overlay the the results ; of this program to the original .COM file: ; ; A>MLOAD MEX.COM=MEX112.COM,MXO-NA1.ASM ; ; = = = = = = = = = = = = = = = = = = ; ; 11/26/84 - MEXified overlay - Ian Cottrell ; 07/26/84 - Added default baud rate and slot # - Ian Cottrell ; 11/11/83 - Renamed to M7NA-1.ASM, no changes - Irv Hoff ; 09/14/83 - Changed M712HZ.ASM TO M712AF.ASM - Robert Lehman ; 07/27/83 - Renamed to work with MDM712 - Irv Hoff ; 02/17/83 - 1st version of M712HZ.ASM - Irv Hoff ; ; = = = = = = = = = = = = = = = = = ; ; MEX Service Processor ; 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 ; CONOUT EQU 2 ;simulated BDOS function 2: console char out PRINT EQU 9 ;simulated BDOS function 9: print string INBUF EQU 10 ;input buffer, same structure as BDOS 10 ; BELL: EQU 07H ;bell CR: EQU 0DH ;carriage return ESC: EQU 1BH ;escape LF: EQU 0AH ;linefeed RON: EQU 01H ;reverse video on ROFF: EQU 02H ;reverse video off ; YES: EQU 0FFH NO: EQU 0 ; ; SLOT: EQU 6 ;slot used for modem port PORT: EQU (6-SLOT)*16 ;addr for selected slot BAUDRP: EQU PORT+8 ;baud rate port for Advantage MODDATP: EQU PORT ;data port for Advantage MODCTL1: EQU PORT+1 ;status port for Advantage MODRCVB: EQU 2 ;bit to test for received data MODRCVR: EQU 2 ;modem receive ready MODSNDB: EQU 1 ;bit to test for ready to send MODSNDR: EQU 1 ;modem send ready bit ; ;110 baud not supported DBDRT1: EQU NO ;default to 300 baud ;450 baud not supported DBDRT3: EQU NO ;default to 600 baud ;710 baud not supported DBDRT5: EQU NO ;default to 1200 baud DBDRT6: EQU NO ;default to 2400 baud DBDRT7: EQU YES ;default to 4800 baud DBDRT8: EQU NO ;default to 9600 baud DBDRT9: EQU NO ;default to 19,200 baud ; IF DBDRT1 DEFBD: EQU 40H ;baud rate register value for 300 DEFMSPD: EQU 1 ;MSPEED value for 300 ENDIF ;DBDRT1 ; IF DBDRT3 DEFBD: EQU 60H ;baud rate register value for 600 DEFMSPD: EQU 3 ;MSPEED value for 600 ENDIF ;DBDRT3 ; IF DBDRT5 DEFBD: EQU 70H ;baud rate register value for 1200 DEFMSPD: EQU 5 ;MSPEED value for 1200 ENDIF ;DBDRT5 ; IF DBDRT6 DEFBD: EQU 78H ;baud rate register value for 2400 DEFMSPD: EQU 6 ;MSPEED value for 2400 ENDIF ;DBDRT6 ; IF DBDRT7 DEFBD: EQU 7CH ;baud rate register value for 4800 DEFMSPD: EQU 7 ;MSPEED value for 4800 ENDIF ;DBDRT7 ; IF DBDRT8 DEFBD: EQU 7EH ;baud rate register value for 9600 DEFMSPD: EQU 8 ;MSPEED value for 9600 ENDIF ;DBDRT8 ; IF DBDRT9 DEFBD: EQU 7FH ;baud rate register value for 19,200 DEFMSPD: EQU 9 ;MSPEED value for 19,200 ENDIF ;DBDRT9 ; SMODEM EQU YES ;if using Smartmodem ; ; ; ; The Advantage uses the 8251 ; ; ORG 100H ; DS 3 ;(for "JMP START" instruction) ; PMMIMODEM: DB NO ;yes=PMMI S-100 Modem 103H IF SMODEM SMARTMODEM: DB YES ;yes=HAYES Smartmodem, no=non-Hayes 104H ENDIF ;SMODEM IF NOT SMODEM SMARTMODEM: DB NO ;yes=Hayes Smartmodem, no=non-Hayes 104H ENDIF ;SMODEM TOUCHPULSE: DB 'P' ;T=touch, P=pulse (Smartmodem-only) 105H CLOCK: DB 40 ;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 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 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=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 '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 125H EXTCHR: DB '^'-40H ;^^ = Send next character 126H ; ; DS 2 ; 128H ; IN$MODCTL1: IN MODCTL1 ;in modem control port 12AH RET DS 7 OUT$MODDATP: OUT MODDATP ;out modem data port 134H RET DS 7 IN$MODDATP: IN MODDATP ;in modem data port 13EH RET DS 7 ANI$MODRCVB: ANI MODRCVB ;bit to test for receive ready 148H RET ; CPI$MODRCVR: CPI MODRCVR ;value of rcv. bit when ready 14BH RET ; ANI$MODSNDB: ANI MODSNDB ;bit to test for send ready 14EH RET ; CPI$MODSNDR: CPI MODSNDR ;value of send bit when ready 151H RET DS 12 ; DS 2 ;not used by MEX 160H DS 6 ; 162H JMP$GOODBYE: JMP GOODBYE ; 168H JMP$INITMOD: JMP INITMOD ;go to user written routine 16BH JMP$NEWBAUD: JMP NEWBAUD ;change baud rate 16EH RET ;(by-passes PMMI routine) 171H NOP NOP RET ;(by-passes PMMI routine) 174H NOP NOP JMP$SETUPR: JMP SETUPR ; 177H DS 3 ;not used by MEX 17AH JMP$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 ; ; CLREOS: LXI D,EOSMSG MVI C,PRINT CALL MEX RET ; CLRSCRN: LXI D,CLSMSG JMP CLREOS+3 ; ; SYSVER: MVI C,ILP CALL MEX DB 'Version for North Star Advantage - Slot ',SLOT+30H DB CR,LF IF SMODEM DB 'with Hayes Smartmodem' DB CR,LF ENDIF DB 'Default Baud Rate: ' IF DBDRT1 DB RON,'300',ROFF ENDIF IF DBDRT3 DB RON,'600',ROFF ENDIF IF DBDRT5 DB RON,'1200',ROFF ENDIF IF DBDRT6 DB RON,'2400',ROFF ENDIF IF DBDRT7 DB RON,'4800',ROFF ENDIF IF DBDRT8 DB RON,'9600',ROFF ENDIF DB ' baud' 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) if using the Hayes Smartmodem ; or by address 0C00H (2659 bytes available) otherwise. ; ;----------------------------------------------------------------------- ; This routine allows a 300 ms. break tone to be send to reset some ; time-share computers. ; SENDBRK: MVI A,08H ;send a break tone for 300 ms. JMP GOODBYE1 ;..... ; ; ; 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: MVI A,0AH ;set break, DTR low ; GOODBYE1: OUT MODCTL1 ;put command register out of mode IN MODCTL1 ;make sure it is now clear IN MODCTL1 ;try once more MVI B,3 ;delay for 300 ms. MVI C,TIMER CALL MEX MVI A,37H ;reset RTS, flags, DTR low, enable R/T OUT MODCTL1 ;send to command register IN MODCTL1 ;clear any incoming chars. IN MODCTL1 ;try once more XRA A ;clear the 'A' reg. RET ;..... ; ; ; The following are used in setting up the modem port. ; Since N/S Bios only initializes the first 3 ports, the ; 8251 for the selected slot is initialized. ; INITMOD: LXI H,INITSTR ;point to initialization string LXI B,5*256+PORT+1 ;B=count, C=UART cmd port DB 0EDH,0B3H ;Z-80 OTIR instruction MVI A,DEFBD ;start at default baud rate OUT BAUDRP ;send to baud rate port MVI A,DEFMSPD ;default xfer time to default baud rate STA MSPEED IN MODCTL1 ;clear any incoming chars. IN MODCTL1 ;try once more XRA A ;clear the 'A' reg. RET INITSTR: DB 80H,80H ;fillers to ensure known state DB 040H ;internal reset DB 04EH ;1 stop bit, 8 data bits, no parity ;16x clock DB 037H ;TX on, RX on, DTR low, RTS low ;reset errors ;..... ; ; ; The following changes the baud rate with the set command. ; SETUPR: MVI C,SBLANK ;any arguments? CALL MEX JC TELL ;if not, go display baud rate LXI D,CMDTBL MVI C,LOOKUP CALL MEX ;parse agrument PUSH H ;save any arg addrs on stack RNC ;if we have one, return to it POP H ;oops, input not found in table MVI C,ILP CALL MEX ;tell user input not valid DB '++ Incorrect Entry ++',CR,LF,BELL,0 RET CMDTBL: DB '30','0'+80H DW OK300 DB '60','0'+80H DW OK600 DB '120','0'+80H DW OK1200 DB '240','0'+80H DW OK2400 DB '480','0'+80H DW OK4800 DB '960','0'+80H DW OK9600 DB '1920','0'+80H DW OK19200 ; TELL: MVI C,ILP CALL MEX DB CR,LF,'Baud rate is now: ',0 LDA MSPEED MVI C,PRBAUD CALL MEX RET OK300: MVI A,1 LHLD BD300 JMP LOADBD OK600: MVI A,3 LHLD BD600 JMP LOADBD OK1200: MVI A,5 LHLD BD1200 JMP LOADBD OK2400: MVI A,6 LHLD BD2400 JMP LOADBD OK4800: MVI A,7 LHLD BD4800 JMP LOADBD OK9600: MVI A,8 LHLD BD9600 JMP LOADBD OK19200: MVI A,9 LHLD BD19200 LOADBD: STA MSPEED ;set xfer time MOV A,L ;get least significant baud rate byte OUT BAUDRP ;set baud rate RET NEWBAUD: CPI 1 JZ OK300 CPI 3 JZ OK600 CPI 5 JZ OK1200 CPI 6 JZ OK2400 CPI 7 JZ OK4800 CPI 8 JZ OK9600 CPI 9 JZ OK19200 RET ;..... ; ; ; Table of baudrate parameters for N/S SIO board ; BD300: DW 0040H BD600: DW 0060H BD1200: DW 0070H BD2400: DW 0078H BD4800: DW 007CH BD9600: DW 007EH BD19200: DW 007FH ; BAUDBUF: DB 10,0 DS 10 ; ;----------------------------------------------------------------------- ; ; The following routine could be used to display selections of interest ; to owners of this computer. If using the Hayes Smartmodem this is ; unavailable without a special change. ; SPCLMENU: RET ; EOSMSG: DB 15,0,0,0,0,'$' ;clear to eos for N/S Advantage CLSMSG: DB 30,15,0,0,0,'$' ;clear screen (home and clear eos) ;----------------------------------------------------------------------- ; ; ; NOTE: MUST TERMINATE PRIOR TO 0400H (with Smartmodem) ; 0C00H (without Smartmodem) ; END ;