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Assembly Source File | 1988-08-15 | 43.3 KB | 1,167 lines

name msxapr ; File MSXAPR.ASM ** current version, needs work ** ; Kermit system dependent module for ACT Apricot ; ; Last edit: 25 April 1988 [rwtc] ; Version 2.30 ; This version runs ok on the FP portable and hopefully on the xi/pc ; I have removed all the microscreen stuff to reduce the size of the filew ; for editing convenience, it could be replaced if anyone feels the need ; of it. Other mods that were necessary were to the SENDBR command this ; now seems to work ok, also the log session command had got scrambled ; somewhere along the line this now works. ; MSUAPR.ASM this works as a basic keyboard translator only, ; work is still needed to provide comlete terminal emulation facilities. ; ; [rwtc] = Dick Carlton Department of Earth Sciences, The Open University ; Walton Hall, Milton Keynes MK7 6AA ; ; 27 May 1987 Add keyboard translator and input translation table rxtable, ; remove references to register bp, minor cleanups here and there. [jrd] ; ASSUMPTION: This module can use something like the Generic keyboard ; translator MSUGEN.asm. Work needed to make MSUAPR.asm! ; ; 28 Sept 1986 Revise procedure Term to permit capturing, printer ready ; testing, debug display. Revised other port procedures too. [jrd] ; 4 Sept 1986 Add Bob Goeke's change to move comms port table to a system ; dependent module (typ msx---) to allow 3+ ports and localized idents. [jrd] ; Added global entry point vtstat for use by Status in mssset. ; Added register save/restore in getbaud procedure. ; Also trimmed off trailing commas in publics. Joe R. Doupnik 12 March 1986 ; Add global procedures ihosts and ihostr to handle host initialization ; when packets are to be sent or received by us,resp. 24 March 1986 ; Add global procedure dtrlow (without worker serhng) to force DTR and RTS low ; in support of Kermit command Hangup. Says Not Yet Implemented. [jrd] ; Add global procedure Dumpscr, called by Ter in file msster, to dump screen ; to a file. Just does a beep for now. 13 April 1986 [jrd] ; Move Hangup message out from middle of Show Key area (my goof). ; 23 April 1986 [jrd] public serini, serrst, clrbuf, outchr, coms, vts, vtstat, dodel public ctlu, cmblnk, locate, lclini, prtchr, dobaud, clearl public dodisk, getbaud, beep, trnprs, pcwait, termtb ;[rwtc] public count, xofsnt, puthlp, putmod, clrmod, poscur, shomodem public sendbr, sendbl, term, machnam, setktab, setkhlp, showkey public ihosts, ihostr, dtrlow, serhng, dumpscr, comptab ; [jrd] public chrout, cstatus, cquit, cquery, chang ; kbd action verbs public snull, kdos, klogof, klogon, modlin, cpyktab, lng_br include a:\mssdef.h if1 %out [Beginning pass 1] else %out [Beginning pass 2] endif false equ 0 true equ 1 instat equ 6 print_out equ 05h ; dos function to print to printer prtscr equ 80h ; print screen pressed rddev equ 3FH open equ 3DH control equ 0FCH ; System Control Device ; external variables used: ; drives - # of disk drives on system ; flags - global flags as per flginfo structure defined in pcdefs ; trans - global transmission parameters, trinfo struct defined in pcdefs ; portval - pointer to current portinfo structure (currently either port1 ; or port2) ; port1, port2 - portinfo structures for the corresponding ports ; global variables defined in this module: ; xofsnt, xofrcv - tell whether we saw or sent an xoff. modfrm struc ; Format of mode line db 'Esc chr: ' m_echr db 2 dup (?) db ', Speed: ' m_baud db 4 dup (?) db ', Parity: ' m_par db 4 dup (?) db ', Echo: ' m_echo db 3 dup (?) db ', Log: ' m_log db 3 dup (?) db ', Type ' m_hlp db 2 dup (?) db '? for Help$' modfrm ends datas segment public 'datas' extrn drives:byte, flags:byte, trans:byte extrn portval:word, port1:byte, port2:byte extrn comand:byte, dmpname:byte ; [jrd] extrn kbdflg:byte, rxtable:byte ; machnam db 'ACT Apricot$' erms20 db cr,lf,'?Warning: System has no disk drives$' erms40 db cr,lf,'?Warning: Unrecognized baud rate$' erms41 db cr,lf,'?Warning: Cannot open com port$' erms50 db cr,lf,'Error reading from device$' badbd db cr,lf,'Unimplemented baud rate$' noimp db cr,lf,'Command not implemented.$' shkmsg db 'Not implemented.' shkmln equ $-shkmsg setktab db 0 setkhlp db 0 hngmsg db cr,lf,' The phone should have hungup.',cr,lf,'$' ; [jrd] hnghlp db cr,lf,' The modem control lines DTR and RTS for the current' db ' port are forced low (off)' db cr,lf,' to hangup the phone. Normally, Kermit leaves them' db ' high (on) when it exits.' db cr,lf,'$' ; [jrd] rdbuf db 80 dup (?) ; temp buf [jrd] crlf db cr,lf,'$' delstr db BS,BS,' ',BS,'$' ; Delete string. clrlin db cr,escape,'K$' ; Clear line. clreol db escape,'K$' ; Clear line. clrscr db escape,'H',escape,'J$' ; Home and clear screen. ; Set High/Low intensity and/or Inverse video/Normal video ; rwtc 26.06.87. invseq db escape,'p$' ; Inverse video mode. nrmseq db escape,'q$' ; Normal video mode. hinton db escape,'($' ; High intensity mode. hintof db escape,')$' ; Low intensity mode. on25 db escape,'j',escape,';$' ; Save cursor posn, move to line 25 off25 db escape,'k$' ; Restore cursor to saved position offmscr db escape,'/',0,escape,'s$' ; Turn off lights, clear, clock on onmscr db escape,'U',escape,'W' ; Direct output to microscreen db escape,'c',escape,'B' ; Disable scrolling, cursor down db 'Break Close Status ' db 'Push Help Log' db escape,'V' ; Revert to normal screen db escape,'/',3FH ; Turn on all keypad lights db '$' xofsnt db 0 ; Say if we sent an XOFF. count dw 0 ; Number of chars in int buffer. portin db 0 ; Port initialization flag inited db 0 ; Terminal handler init flag argadr dw ? ; address of arg blk from msster.asm parmsk db ? ; 8/7 bit parity mask, for reception flowoff db ? ; flow-off char, Xoff or null (if no flow) flowon db ? ; flow-on char, Xon or null captrtn dw ? ; routine to call for captured output tmp db ?,'$' temp dw 0 temp1 dw ? ; Temporary storage. temp2 dw ? ; Temporary storage. ; Added from msxibm.asm [rwtc] 22.03.88 this is here just to make the ; status display look nicer (at the moment) [rwtc] ; begin Terminal emulator data set termtb db tttypes ; entries for Status, not Set mkeyw 'Heath-19',ttheath mkeyw 'none',ttgenrc mkeyw 'Tek4010',tttek mkeyw 'VT102',ttvt100 mkeyw 'VT52',ttvt52 ; shomodem messages from msxibm.asm [rwtc] 18.03.88 (just for show at present) mdstreg db 0 msmsg1 db cr,lf,' Modem is not ready: DSR is off$' msmsg2 db cr,lf,' Modem is ready: DSR is on$' msmsg3 db cr,lf,' no Carrier Detect: CD is off$' msmsg4 db cr,lf,' Carrier Detect: CD is on$' msmsg5 db cr,lf,' no Clear To Send: CTS is off$' msmsg6 db cr,lf,' Clear To Send: CTS is on$' ; This character string is used to program various keys to return ; the correct ASCII characters. kbdesc db escape,'43',44,'['-100O ; Program CTRL-[ key db escape,'43',45,']'-100O ; Program CTRL-] key db '$' ; This table is indexed by the baud rate definitions given in msdefs.h. ; Unsupported baud rates should contain FF. bddat label word dw 0FFH ; 45.5 Unsupported dw 1 ; 50 dw 2 ; 75 dw 3 ; 110 dw 4 ; 134.5 dw 5 ; 150 dw 6 ; 300 dw 7 ; 600 dw 8 ; 1200 dw 9 ; 1800 dw 0FFH ; 2000 Unsupported dw 10 ; 2400 dw 12 ; 4800 (Have to skip 3600) dw 14 ; 9600 (Have to skip 7200) dw 15 ; 19200 dw 0FFH ; 38400 Unsupported comptab db 2 ; communciations port options [jrd] mkeyw '1',1 mkeyw 'COM1',1 ; no choice here ourarg termarg <> modbuf modfrm <> ; Mode line buffer ; Some static data for the mode line. unkbaud db 'Unk ' baudn db '45.5' db ' 50' db ' 75' db ' 110' db ' 135' db ' 150' db ' 300' db ' 600' db '1200' db '1800' db '2000' db '2400' db '4800' db '9600' db ' 19K' db ' 38K' parnams db 'Even' db 'Mark' db 'None' db 'Odd ' db 'Spc ' offmsg db 'Off' onmsg db 'On ' lclmsg db 'Lcl' remmsg db 'Rem' keyoff dw 0 keyseg dw 0 datas ends code segment public 'code' extrn comnd:near, dopar:near, prserr:near, atoi:near, prompt:near extrn sleep:near, msuinit:near, keybd:near ; [jrd] assume cs:code,ds:datas ; Produce a short beep. The PC DOS bell is long enough to cause a loss ; of data at the port. Returns normally. BEEP PROC NEAR mov dl,bell mov ah,dconio int dos ret BEEP ENDP ; Clear to the end of the current line. Returns normally. CLEARL PROC NEAR mov dx,offset clreol jmp tmsg ; Send terminal message CLEARL ENDP ; Clear the input buffer. This throws away all the characters in the ; serial interrupt buffer. This is particularly important when ; talking to servers, since NAKs can accumulate in the buffer. ; Returns normally. CLRBUF PROC NEAR push bx ; save regs. [jrd] push cx mov bx,34H ; Serial Device Driver mov cx,2 ; Read serial port clrbf1: int control ; Call System Control Device cmp ax,-1 ; Read anything ? jne clrbf1 ; Yes, try again pop cx ; [jrd] pop bx ret CLRBUF ENDP ; clear the mode line written by putmod. Returns normally. CLRMOD PROC NEAR mov dx,offset on25 ; Move to line 25 call tmsg call clearl ; Clear to end of line. mov dx,offset off25 ; Restore cursor position call tmsg ret CLRMOD ENDP ; This routine blanks the screen. Returns normally. CMBLNK PROC NEAR mov dx,offset clrscr jmp tmsg ; Send terminal message. CMBLNK ENDP ; Set the current port. COMS PROC NEAR jmp notimp COMS ENDP ; Make a copy of the keyboard table so that we can redefine some keys ; when we go into CONNECT state. CPYKTAB PROC NEAR push ds mov ax,0 mov es,ax ; ES -> lowest page in memory mov ax,es:[0712H] mov keyoff,ax ; Save offset to keytable mov si,ax ; For the copy mov ax,es:[0714H] mov keyseg,ax ; Save segment of keytable ; mov ds,ax ; DS:SI -> system keyboard table call keybd mov es,ax mov di,0 ; ES:DI -> our keyboard table ; mov cx,0400H ; Length of table cld rep movsb ; Copy table ; call keybd jmp notimp mov ds,ax ; Point to our keyboard segment ; mov cx,12 cld rep movsb ; copy pointers pop ds ; restore DS ret CPYKTAB ENDP ; Move the cursor to the left margin, then clear to end of line. ; Returns normally. CTLU PROC NEAR mov dx,offset clrlin jmp tmsg CTLU ENDP ; Set the baud rate for the current port, based on the value ; in the portinfo structure. Returns normally. DOBAUD PROC NEAR push ax ; save regs. [jrd] push bx push cx mov bx,portval mov temp1,ax ; Save new rate, don't zap old rate yet mov ax,[bx].baud ; Check if new rate is valid. mov tmp,2 mul tmp ; Get index into baud table. mov bx,offset bddat ; Start of table. add bx,ax mov ax,[bx] ; The data to output to the port cmp ax,0FFH ; Unimplemented baud rate. jne dobd0 mov ax,temp1 ; Get back original value. mov bx,portval mov [bx].baud,ax ; Leave rate as is. mov dx,offset badbd ; Give an error message. call tmsg pop cx pop bx pop ax ret ; dobd0: mov dx,ax mov bx,34H ; Serial Device Driver mov cx,4 ; Set transmit baud rate int control mov cx,5 ; Set receive baud rate int control mov dx,1 ; Turn on XON/XOFF just in case... mov cx,10 ; Transmit XON/XOFF int control mov cx,11 ; Receive XON/XOFF int control mov cx,3 ; Install changes, zap line, etc... int control mov inited,0 ; Need to re-init on CONNECT pop cx pop bx pop ax ret DOBAUD ENDP ; Delete a character from the terminal. This works by printing ; backspaces and spaces. Returns normally. DODEL PROC NEAR mov dx,offset delstr ; Erase weird character. jmp tmsg DODEL ENDP ; This is called by Kermit initialization. It checks the ; number of disks on the system, sets the drives variable ; appropriately. Returns normally. DODISK PROC NEAR mov ah,gcurdsk ; Current disk value to AL. int dos mov dl,al ; Put current disk in DL. mov ah,seldsk ; Select current disk. int dos ; Get number of drives in AL. mov drives,al ret DODISK ENDP ; Get the current baud rate from the serial card and set it ; in the portinfo structure for the current port. Returns normally. ; This is used during initialization. GETBAUD PROC NEAR push ax ; save some regs [jrd] push bx push cx ; [jrd] push dx ; [jrd] mov bx,34H ; Serial Device Driver mov cx,4 ; Transmit baud rate mov dx,-1 ; Fetch data int control ; Go speak to Control Device Driver mov bx,offset bddat ; -> baud rate table mov cl,0 ; Keep track of index getb0: cmp ax,[bx] je getb1 inc cl cmp cl,baudsiz ; At the end of the list jge getb2 add bx,2 jmp getb0 getb1: mov ch,0 mov bx,portval mov [bx].baud,cx ; Save rate index in port structure jmp getb3 ; [jrd] getb2: mov dx,offset erms40 call tmsg getb3: pop dx ; restore regs [jrd] pop cx ; [jrd] pop bx ; [jrd] pop ax ; [jrd] ret GETBAUD ENDP ; Initialize local variables and communications port. LCLINI PROC NEAR mov flags.vtflg,0 ; Don't do terminal emulation. mov bx,34H ; Control Device Driver mov cx,0 ; Initialise driver mov dx,0 int control mov cx,6 ; Set transmit bits per character mov dx,8 ; to 8-bit bytes int control mov cx,8 ; Set receive bits per character mov dx,7 ; to 8-bit bytes int control mov cx,8 ; Set number of stop bits mov dx,1 ; to 1 stop bit int control mov cx,9 ; Set parity type mov dx,0 ; Parity handled by DOPAR. int control mov cx,10 ; Transmit XON/XOFF mov dx,1 ; Enabled int control mov cx,11 ; Receive XON/XOFF mov dx,1 ; Enabled int control mov cx,3 ; Install changes int control mov dx,offset kbdesc call tmsg ; Re-program keyboard call msuinit ; init keyboard translator ret LCLINI ENDP ; Homes the cursor. Returns normally. LOCATE PROC NEAR mov dx,0000H ; Go to top left corner of screen. jmp poscur LOCATE ENDP ; Display mode line. MODLIN PROC NEAR mov al,ourarg.escc mov modbuf.m_echr,' ' mov modbuf.m_hlp,' ' cmp al,32 ; ESC char printable ? jnb modl1 ; Yes, keep going add al,40H ; Convert to printable mov modbuf.m_echr,'~' ; Note control char mov modbuf.m_hlp,'~' modl1: mov modbuf.m_echr+1,al ; Fill in character mov modbuf.m_hlp+1,al ; mov al,ourarg.baudb ; Get baud rate mov si,offset unkbaud ; Just in case it falls out of range cmp al,baudsiz ; Too big ? jnb modl2 ; Yes, use default mov cl,2 ; Each entry is 4 bytes shl al,cl mov ah,0 add ax,offset baudn ; ax -> baud rate string mov si,ax modl2: mov cx,size m_baud ; length of baud space mov di,offset modbuf.m_baud push es ; save es push ds pop es ; set es to datas segment cld rep movsb ; Copy over baud rate ; mov al,ourarg.parity ; Get parity code mov cl,2 ; Each entry is 4 bytes long shl al,cl mov ah,0 add ax,offset parnams ; ax -> parity setting mov si,ax mov cx,4 mov di,offset modbuf.m_par rep movsb ; Copy over parity setting string ; mov si,offset remmsg ; Assume remote echoing test ourarg.flgs,lclecho jz modl3 mov si,offset lclmsg ; Doing local echo modl3: mov cx,3 mov di,offset modbuf.m_echo rep movsb ; mov si,offset offmsg ; Assume not logging test ourarg.flgs,capt jz modl4 mov si,offset onmsg ; Logging input modl4: mov cx,3 mov di,offset modbuf.m_log rep movsb pop es ; restore es ; mov dx,offset modbuf call putmod ; Print mode line ret MODLIN ENDP ; Clear microscreen, redisplay time and revert to system keyboard table. NOTIMP: mov dx,offset noimp call tmsg jmp prserr ; Put the number in ax into the buffer pointed to by di. di is updated. NOUT PROC NEAR mov dx,0 mov bx,10 div bx push dx or ax,ax jz nout1 call nout nout1: pop ax add al,'0' stosb ret NOUT ENDP ; Put the char in AH to the serial port. This assumes the ; port has been initialized. XON/XOFF are handled by the port ; driver. Skip returns on success, returns normally if the ; character cannot be written. OUTCHR PROC NEAR push bx push cx push dx ; Save register. sub cx,cx mov al,ah ; Parity routine works on AL. call dopar ; Set parity appropriately. mov dl,al mov dh,0 mov cx,1 ; Transmit char mov bx,34H ; Serial Device Driver int control ; System Control Device pop dx pop cx pop bx jmp rskp OUTCHR ENDP ; Position the cursor according to contents of DX: ; DH contains row, DL contains column. Origin (top left) = 0, 0 ; Returns normally. Revised 28 Sept 1986 by [jrd] POSCUR PROC NEAR push ax ; [jrd] mov ah,conout ; display on console push dx ; Save row & column position mov dl,escape ; Start cursor positioning sequence int dos ; [jrd] mov dl,'Y' int dos ; [jrd] pop dx ; Retrieve row position push dx ; save again [jrd] mov dl,dh add dl,' ' ; add ascii bias [jrd] int dos pop dx push dx add dl,' ' int dos pop dx pop ax ; [jrd] ret POSCUR ENDP ; Use for DOS 2.0 and above. Check the port status. If no data, skip ; return. Else, read in a char and return. ; Revised 28 Sept 1986 by [jrd] PRTCHR PROC NEAR push bx push cx push si mov bx,34H mov cx,2 int control ; Read serial port pop si pop cx pop bx cmp ax,-1 ; Character there ? jne prtch1 ; Yes, process it... jmp rskp ; No character, skip return. prtch1: ret PRTCHR ENDP ; IHOSTS - Initialize the host by sending XON, or equivalent, and enter the ; cycle of clear input buffer, wait 1 second, test if buffer empty then exit ; else repeat cycle. Requires that the port be initialized before hand. ; Ihosts is used by the local send-file routine just after initializing ; the serial port. ; 22 March 1986 [jrd] IHOSTS PROC NEAR push ax ; save the registers push bx push cx push dx mov bx,portval ; port indicator mov ax,[bx].flowc ; put Go-ahead flow control char in ah or ah,ah ; don't send null if flow = none jz ihosts1 ; z = null call outchr ; send it (release Host's output queue) nop ; outchr can do skip return nop nop ihosts1:call clrbuf ; clear out interrupt buffer mov ax,1 ; sleep for 1 second call sleep ; procedure sleep is in msscom.asm call prtchr ; check for char at port jmp ihosts1 ; have a char in al, repeat wait/read cycle nop ; prtchr does skip return on empty buffer pop dx ; empty buffer. we are done here. pop cx pop bx pop ax ret IHOSTS ENDP ; IHOSTR - initialize the remote host for our reception of a file by ; sending the flow-on character (XON typically) to release any held ; data. Called by receive-file code just after initializing the serial ; port. 22 March 1986 [jrd] IHOSTR PROC NEAR push ax ; save regs push bx push cx mov bx,portval ; port indicator mov ax,[bx].flowc ; put Go-ahead flow control char in ah or ah,ah ; don't send null if flow = none jz ihostr1 ; z = null call outchr ; send it (release Host's output queue) nop ; outchr can do skip return nop nop ihostr1:pop cx pop bx pop ax ret IHOSTR ENDP DTRLOW PROC NEAR ; Global proc to Hangup the Phone by making ; DTR and RTS low. mov ah,cmtxt ; allow text to be able to display help mov bx,offset rdbuf ; dummy buffer mov dx,offset hnghlp ; help message call comnd ; get a confirm jmp r ; not yet imp. call serhng ; drop DTR and RTS mov ah,prstr ; give a nice message ; not yet imp. mov dx,offset hngmsg mov dx,offset noimp ; for now int dos jmp rskp DTRLOW ENDP ; Hang up the Phone. Similar to SERRST except it just forces DTR and RTS low ; to terminate the connection. 29 March 1986 [jrd] ; Calling this twice without intervening calls to serini should be harmless. ; Returns normally. ; SERHNG is Not Yet Implemented. SERHNG PROC NEAR ret SERHNG ENDP ; Wait for the # of milliseconds in ax, for non-IBM compatibles. ; Based on 4.77 Mhz 8088 processor speeds. ; Thanks to Bernie Eiben for this one. pcwait proc near mov cx,240 ; inner loop counter for 1 millisecond pcwai1: sub cx,1 ; inner loop takes 20 clock cycles jnz pcwai1 dec ax ; outer loop counter jnz pcwait ; wait another millisecond ret pcwait endp ; Put a help message on the screen. ; Pass the message in ax, terminated by a null. Returns normally. PUTHLP PROC NEAR push ax ; preserve this mov dx,offset crlf call tmsg mov dx,offset hinton ; Turn on high intensity call tmsg pop si ; point to string again cld puthl3: lodsb ; get a byte cmp al,0 ; end of string? je puthl4 ; yes, stop mov dl,al mov ah,dconio int dos ; else write to screen jmp puthl3 ; and keep going puthl4: mov dx,offset hintof ; Back to normal call tmsg mov dx,offset crlf call tmsg ret PUTHLP ENDP ; Write a line in high intensity on line 25. The line is pointed to by ; ds:dx, terminated by a $. Returns normally. PUTMOD PROC NEAR push dx ; preserve message pointer. mov dx,offset on25 ; Move down to line 25 call tmsg mov dx,offset invseq ; Turn on high intensity call tmsg pop dx ; get message back call tmsg ; write it out mov dx,offset nrmseq ; Normal (low) intensity again call tmsg mov dx,offset off25 ; Restore cursor position call tmsg ret ; and return PUTMOD ENDP ; Jumping here is the same as a ret. R PROC NEAR ret R ENDP ; Jumping to this location is like retskp. It assumes the instruction ; after the call is a jmp addr. RSKP PROC NEAR pop bp add bp,3 push bp ret RSKP ENDP ; Send a break out to the serial port. Returns normally. ; Need to handle port directly since ACT's Control Device doesn't ; have a 'send break' facility. ; altered the SIO port address from 62HEX to 1AHEX this works for FP ; I'm not sure about the XI/PC [rwtc] 25.04.88 SENDBR PROC NEAR push ax push bx mov al,5 out 1ah,al ; Select SIO write register 5 mov al,0FAH out 1ah,al ; Start break mov al,2 sendb0: mov bx,-1 sendb1: dec bx ; Delay for a while... jnz sendb1 dec al jnz sendb0 mov al,5 out 1ah,al ; Select SIO write register 5 mov al,0EAH out 1ah,al ; Finished sending break pop bx pop ax clc ret SENDBR ENDP SENDBL PROC NEAR ; Send a long break call sendbr ; simulate long call sendbr call sendbr call sendbr clc ret SENDBL ENDP ; Initialization for using serial port. XON/XOFF has already been set by ; the local initialization routine. Returns normally. ; Revised 28 Sept 1986 by [jrd] SERINI PROC NEAR cmp portin,0 ; Initialized already ? jne serin0 ; Yes, forget it. cld ; Do increments in string operations ; Some day we may have an interrupt handler to install... call clrbuf ; Clear input buffer. push bx mov bx,portval ; get port [jrd] mov parmsk,0ffh ; parity mask, assume parity is None. [jrd] cmp [bx].parflg,parnon ; is it None? je serin1 ; e = yes mov parmsk,07fh ; no, pass lower 7 bits as data serin1: mov bx,[bx].flowc ; get flow control chars mov flowoff,bl ; xoff or null mov flowon,bh ; xon or null pop bx mov portin,1 ; Say we've been through once serin0: ret ; We're done. SERINI ENDP ; Reset the serial port. This is the opposite of serini. Calling ; this twice without intervening calls to serini should be harmless. ; Returns normally. SERRST PROC NEAR cmp portin,0 ; Reset already ? je srst1 ; Yes, forget it ; One day soon we may want to restore the interrupt handler, I hope... mov portin,0 srst1: ret ; All done. SERRST ENDP SHOWKEY PROC NEAR mov ax,offset shkmsg mov cx,shkmln ret SHOWKEY ENDP ; Dumb terminal emulator. ; Revised 28 Sept 1986 by [jrd] TERM PROC NEAR mov si,ax ; this is source mov di,offset ourarg ; place to store arguments push es ; save es push ds pop es ; address destination segment mov cx,size termarg cld rep movsb ; copy into our arg blk pop es ; recover es and ourarg.flgs,not (prtscr) ; no screen printing at startup [jrd] mov ax,ourarg.captr mov captrtn,ax ; buffer capture routine mov parmsk,0ffh ; parity mask, assume parity = None cmp ourarg.parity,parnon ; is parity None? je term0a ; e = yes, keep all 8 bits mov parmsk,07fh ; else keep lower 7 bits term0a: test flags.remflg,d8bit ; keep 8 bits for displays? jnz term0b ; nz = yes, 8 bits if possible mov parmsk,07fh ; else keep lower 7 bits term0b: call clrmod ; Clear mode line test ourarg.flgs,modoff ; Is mode line disabled ? jnz term0 ; Yes, skip this call modlin ; term0: cmp inited,0 ; inited yet ? jnz term1 ; yes, skip this bit... mov bx,34H mov dx,1 mov cx,12 ; Turn on RTS int control mov cx,13 ; Turn on DTR int control mov inited,1 ; Remember we've inited term1: call portchr ; get char from port, apply parity mask jnc short term2 ; nc = no char, go on call outtty ; display and capture char term2: call keybd ; read keyboard and send via translator jnc term1 ; nc = stay in Connect mode term4: call clrmod ret term endp ; put the character in al to the screen, do capture and printing, ; does translation for Set Input command. ; Adapted from msyibm.asm [jrd] outtty proc near test flags.remflg,d8bit ; keep 8 bits for displays? jnz outnp9 ; nz = yes, 8 bits if possible and al,7fh ; remove high bit outnp9: cmp rxtable+256,0 ; translation turned off? je outnp7 ; e = yes, no translation push bx mov bx,offset rxtable ; address of translate table [jrd] xlatb ; new char is in al pop bx outnp7: test ourarg.flgs,prtscr ; should we be printing? jz outnop ; no, keep going push ax mov ah,lstout ; write to system printer device mov dl,al int dos pop ax jnc outnop ; nc = successful print push ax call beep ; else make a noise and call trnprs ; turn off printing pop ax outnop: test ourarg.flgs,capt ; capturing output? jz outnoc ; no, forget this part push ax ; save char call captrtn ; give it captured character pop ax ; restore character and keep going outnoc: test ourarg.flgs,trnctl ; debug? if so use Bios tty mode jz outnp4 ; z = no mov ah,print_out ; Bios tty screen write cmp al,7fh ; Ascii Del char or greater? jb outnp1 ; b = no je outnp0 ; e = Del char push ax ; save the char mov dl,7eh ; output a tilde for 8th bit int dos pop ax ; restore char and al,7fh ; strip high bit outnp0: cmp al,7fh ; is char now a DEL? jne outnp1 ; ne = no and al,3fH ; strip next highest bit (Del --> '?') jmp outnp2 ; send, preceded by caret outnp1: cmp al,' ' ; control char? jae outnp3 ; ae = no add al,'A'-1 ; make visible outnp2: push ax ; save char mov dl,5eh ; caret int dos ; display it pop ax ; recover the non-printable char outnp3: mov dl,al int dos ret outnp4: cmp al,bell ; bell (Control G)? [jrd] jne outnp5 ; ne = no jmp beep ; use short beep, avoid char loss. outnp5: or al,al ; catch nulls jz outnp6 ; z = null, ignore it cmp al,del ; catch dels je outnp6 ; e = del, ignore it mov dl,al ; write without intervention. mov ah,conout int dos ; else let dos display char outnp6: ret ; and return outtty endp ; send the character in al out to the serial port; handle echoing. ; Can send an 8 bit char while displaying only 7 bits locally. outprt proc near test ourarg.flgs,lclecho ; echoing? jz outpr1 ; z = no, forget it push ax ; save char call outtty ; print it pop ax ; restore outpr1: mov ah,al ; this is where outchr expects it call outchr ; output to the port nop nop nop ; skip returns... ret outprt endp ; Get a char from the serial port manager ; returns with carry on if a character is available portchr proc near call prtchr ; character at port? jmp short portc1 ; yes, go handle nop ; skip return is stupid... portc0: clc ; no carry -> no character ret ; and return... portc1: and al,parmsk ; apply 8/7 bit parity mask [jrd] push bx ; Translate incoming char [jrd] mov bx,offset rxtable ; address of translate table [jrd] xlat ; new char is in al pop bx or al,al ; catch nulls jz portc0 ; z = null, ignore it cmp al,del ; catch dels je portc0 ; e = del, ignore it stc ; have a character ret ; and return portchr endp ;; keyboard translator action routines, system dependent, called from msugen. ; These are invoked by a jump instruction. Return carry clear for normal ; processing, return carry set for invoking Quit (kbdflg has transfer char). chrout: call outprt ; put char in al to serial port clc ; stay in Connect mode ret trnprs: push ax ; toggle Copy screen to printer test ourarg.flgs,prtscr ; are we currently printing? jnz trnpr2 ; nz = yes, its on and going off mov ah,ioctl mov al,7 ; get output status of printer push bx mov bx,4 ; file handle for system printer int dos pop bx jc trnpr1 ; c = printer not ready cmp al,0ffh ; Ready status? je trnpr2 ; e = Ready trnpr1: call beep ; Not Ready, complain jmp trnpr3 ; and ignore request trnpr2: xor ourarg.flgs,prtscr ; flip the flag trnpr3: pop ax clc ret klogon proc near ; resume logging (if any) test flags.capflg,logses ; session logging enabled? jz klogn ; z = no, forget it or ourarg.flgs,capt ; turn on capture flag klogn: clc ret klogon endp klogof proc near ; suspend logging (if any) and argadr.flgs,not capt ; stop capturing klogo: clc ret klogof endp snull: mov ah,0 ; send a null call outchr ; send without echo or logging nop nop nop clc ret lng_br proc near call sendbl lng_br endp kdos: mov al,'P' ; Push to DOS jmp short cmdcom cstatus:mov al,'S' ; these commands exit Connect mode jmp short cmdcom cquit: mov al,'C' jmp short cmdcom chang: mov al,'H' ; Hangup drop DTR & RTS jmp short cmdcom cquery: mov al,'?' jmp short cmdcom cmdcom: mov kbdflg,al ; pass char to msster.asm via kbdflg stc ; say exit Connect mode ret ;; end of action routines ; Print a message to the screen. Returns normally. TMSG PROC NEAR push ax push bx push cx push dx ; dx has offset of message. mov ah,prstr int dos pop dx pop cx pop bx pop ax ret TMSG ENDP SHOMODEM PROC NEAR mov ah,cmcfm ; get a confirm call comnd jmp r ; no confirm nop call serini ; activate port to get status call serrst ; turn off port again mov ah,prstr mov dx,offset msmsg1 ; modem ready msg test mdstreg,20h ; is DSR asserted? jz shomd1 ; z = no mov dx,offset msmsg2 ; say not asserted shomd1: int dos mov dx,offset msmsg3 ; CD asserted msg test mdstreg,80h ; CD asserted? jz shomd2 ; z = no mov dx,offset msmsg4 ; say not asserted shomd2: int dos mov dx,offset msmsg5 ; CTS asserted msg test mdstreg,10h ; CTS asserted? jz shomd3 ; z = no mov dx,offset msmsg6 ; say not asserted shomd3: int dos jmp rskp SHOMODEM ENDP ; Set heath emulation on/off. VTS PROC NEAR jmp notimp VTS ENDP VTSTAT PROC NEAR ; For use by Status in mssset [jrd] ret ; no emulator status to report VTSTAT ENDP ; Save the screen to a buffer and then append buffer to a disk file. [jrd] ; Default filename is Kermit.scn; actual file can be a device too. Filename ; is determined by mssset and is passed as pointer dmpname. DUMPSCR PROC NEAR ; Dumps screen contents to a file. Just Beeps here call beep ; [jrd] ret DUMPSCR ENDP CODE ENDS END