NAME msxap3 Page 60,132 ; Last edit: 14 March 1988 ; NEC APCIII Edit History ; RFGoeke, MIT Center for Space Research, 627-253-1910 ; Goeke @ SPACE.MIT.EDU ; 14 March 1988 Rev. a for V2.30 ; Minor patches to get compatible with released IBM V2.30 ; Major shuffle to get text lined up with msxibm so diff will work ; Change "esc" to "escape"; add shomodem and termtb; add vtemu.vtflgop ; 6 October 1987 Rev. F ; Recreate SERRST to turn off all ports; called by mssker when exiting; ; keeps incoming characters on unwatched line from bombing system. ; NB this is also called by mssrcv, mssscp, ssssen, and msster !!! ; so one has to keep the modem status lines ON at all times. ; Also increased Hangup DTR drop to 2 seconds; recalibrated pcwait. ; 8 July 1987 Rev. E ; Minor fix ups to keep pace with v/2.29C development; recalibrated ; timer code in pcwait. ; 5 November 1986 Rev. D ; Major bug in serini fixed (characters in unaddressed ports were ; coming through and corrupting DOS ; 14 October 1986 Rev. B ; Modified to work with [2.29a] code. ; 21 August 1986 Rev. N ; Modified from the [2.29] code for msxibm ; with help from the RAL Version 2.0. ; General considerations: ; The presence of ANSI.SYS in the booted CONFIG.SYS file is assumed. ; If ports 2 or 3 are to be used, OPTRS232.SYS is required in CONFIG.SYS ; References to modems have also been deleted. ; Bugs found: ; The NEC BIOS call to the screen (19H) tends to wipe out the SI ; register; a lot of push/pops have been added for this reason. ; The RS232 BIOS call miscalculates the end of the circular receive ; buffer by 20 bytes (see comments in SERINI). ; (The following comments are from msxibm.asm; not all apply here!) ; 1 Jan 1988 version 2.30 ; 24 Dec 1987 Revise selection of COM1 to use COM1 name but COM2 addresses ; if base address of 02f8 (COM2) is found in 40:00h and display notice. ; Restore state of IRQ interrupt line when finished with serial port. [jrd] ; 31 Oct 1987 Add terminal type Tek4010, with Tek submode Tekflg. [jrd] ; 24 Oct 1987 Enhance clrbuf to empty any intermediate (net) buffers. [jrd] ; 19 Oct 1987 Fix stray tab-set at column 32. [jrd] ; 2 Oct 1987 Add PCjr baud rate table, from Ted Medin. [jrd] ; 6 Sept 1987 Allow serial port serint to send xoff when buffer fills even ; though user may have sent xoff by hand. [jrd] ; 27 Aug 1987 Skip timeout test in OUTCHR if receive timeout is zero. [jrd] ; 23 August 1987 Add vtemu.vtflgop to hold runtime terminal settings so that ; a reset command restores them to the Setup values, vtemu.vtflgst. Show ; displays the vtemu.vtflgop operational values. [jrd] ; 17 August 1987 Make timing adjustments for Token Passing and single buffered ; network adapter boards. Byte netdbfr indicates presence of double buffering; ; it is set in chknet as a vendor option. To test your boards force dbl buf ; then look for missing 256 byte parts of long packets sent out; missing parts ; mean new material overwrote not-yet-sent old == single buffering. [jrd] ; 8 August 1987 Add interrupt chaining in serint. [jrd] ; 23 July 1987 Clear xofsnt and xofrcv xon/xoff flags in ihost(s/r). [jrd] ; 9 July 1987 Cure confusion about COM1/2 for IBM PCjr (address of regular ; COM2 in 40:0h slot for COM1) with info from John Neufeld. [jrd] ; 2 July 1987 Route NetBios cancels through separate scb for systems, such ; as Novell NetWare, which object to having active scbs touched. [jrd] ; 25 June 1987 Add trapping of Int 14H (Bios RS232 procedure) to allow ; CTTY command to function without too much inteference from DOS. [jrd] ; 17 June 1987 Enlarge tab setting to full 132 columns at all times. [jrd] ; 11 June 1987 Add Set Term Roll on/off to control auto roll back of screen ; when new characters are displayed; default is off (no unwinding). [jrd] ; 20 May 1987 Remove rejection of NULL and DEL chars, let callers do it. [jrd] ; 16 May 1987 Add distinction between user typed and receiver threshold ; controlled sending of XOFF. User level overrides buffer control.[jrd] ; Add COM3 and COM4 support: examine memory 40:00h->40:07h for selected ; port COM1..4, resp. If word is null then set flags.comflg to 0 to say ; undefined port. Otherwise, use that word in seg 40h as base of UART i/o ; ports. Assume IRQ4 for COM1 and COM3 (same except for port addresses) ; and IRQ4 for COM2 and COM4 (again, same except for port addresses). ; Serial port info sturcture (not values) assumed identical for all ports. ; 25 April 1987 Add Netbios compatible local area network support. [jrd] ; Set Port command expanded to syntax SET PORT NET nodename. Use nodename ; if acting as a client to named remote node, leave blank if running in ; Server mode. Byte 'ttyact' is controlled by msster.asm to indicate Connect ; mode is being used. Byte 'netdone' (stored in mssker.asm) holds offset of ; network hangup procedure 'netclose' to be done when leaving Kermit. Hangup ; command extended to to network hangup as well. Network uses IBM Netbios ; standard calls (Int 5Ch) and allows for extensions of AT&T STARLAN for ; longer node names via Int 2Bh (the later is tested before use). Virtual ; circuits are employed. The Redirector is not necessary. Kermit can operate ; as either a terminal (does a CALL at Connect mode startup), a file receiver ; (does a CALL at startup), or a Kermit server (does an anonomous LISTEN at ; startup, hence no nodename). Clients should Set Timer Off. ; 16 April 1987 Add measurement and correction of software timer pcwait. [jrd] ; 5 April 1987 Keep DTR & RTS low for 1/2 second in serhng, suggested by ; Jack Bryans. [jrd] ; 28 March 1987 Reference screen coord wrt low_rgt from msyibm, let number ; of tabs be full screen width. [jrd] ; 22 March 1987 Fix bug in pcwait code, from Stefan Vogel. [jrd] ; 6 March 1987 Make PCWAIT a global procedure, add SENDBL to send Long ; Break. [jrd] ; 21 Feb 1987 Merge operations for semi-clone machines (those identical to ; IBM PC's except the serial port must be accessed via the Bios rather than ; from the real UART hardware). Ports automatically checked for 8250. [jrd] ; 1 Oct 1986 Version 2.29a ; 30 Sept 1986 Reject DEL char at serial port reception level to avoid ; problems when DEL is used as a filler char (by Emacs). [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] ; 26 August 1986 Use parity mask when testing for nulls & Xon/Xoff in serial ; port interrupt routine. [jrd] ; 16 August 1986 Use observed screen attributes for mode line. [jrd] ; 9 August 1986 Revise SERINT to insert control-G for overrun chars, give ; faster return of interrupts to system, remove use of BP in code. [jrd] ; 17 July 1986 Minor clean up of Terminal Status display routine. [jrd] ; 22 June 1986 Leave 8250 UART signal OUT1 low to avoid resetting Hayes ; 1200B modems (thanks to Neil Rickert). [jrd] ; Skip sending null byte in ihosts and ihostr (thanks to Skip Russell). [jrd] ; 22 May 1986 Rewrite serial port interrupt procedure and proc prtchr ; to avoid lockups with interrupts disabled, buffer corruption, and to ; minimize lost clock interrupts. Flow control not needed at 9600 baud, ; slow screen refresh, VT102 emulation, on a 4.77 MHz IBM PC clone. ; Added buffer low water mark to give more xon/xoff hysterisis. [jrd] ; [2.29] code frozen on 6 May 1986 [jrd] ; Note - ; When the Bios is used for serial port i/o the modem signals DSR and CTS ; must be asserted low before the Bios will access the hardware. Jumpers ; from pin 20 (DTR) to pin 6 (DSR) and from pin 4 (RTS) to pin 5 (CTS) ; will probably be necessary. ; From Glenn Everhart (who suggested using the Bios alternative) ; public serini, serrst, clrbuf, outchr, coms, vts, vtstat public dodel, ctlu, cmblnk, locate, prtchr, dobaud, clearl public dodisk, getbaud, beep, termtb, shomodem public count, xofsnt, puthlp, putmod, clrmod, poscur public sendbr, sendbl, machnam, setktab, setkhlp, lclini, showkey public ihosts, ihostr, dtrlow, serhng, comptab, pcwait include mssdef.h false equ 0 true equ 1 ; the following sets the text attributes RFG att_low_mask equ 1FH ; Various attribute-related equates att_overline equ 01H ; this is all NEC version stuff RFG att_blink equ 02H att_rev_video equ 04H att_underline equ 08H att_intensity equ att_rev_video nec_black equ 00H ; This table gives colors RFG nec_blue equ 20H ; (only bits 8,7,6 count) nec_red equ 40H nec_magenta equ 60H nec_green equ 80H nec_cyan equ 0A0H nec_yellow equ 0C0H nec_white equ 0E0H ; constants used by serial port handler KEYB EQU 18H ; RFG BIOS EQU 19H ; RFG ; 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 ; low_rgt - low byte = last column (typ 79), high byte = last text row ; (typ 23) in screen coordinates (start at 0), set by msyibm. ; global variables defined in this module: ; xofsnt, xofrcv - tell whether we saw or sent an xoff. ; setktab - keyword table for redefining keys (should contain a 0 if ; not implemented) ; setkhlp - help for setktab. datas segment public 'datas' extrn drives:byte, flags:byte, trans:byte, ttyact:byte extrn portval:word, port1:byte, port2:byte, port3:byte, port4:byte extrn netdone:word, pcnet:byte extrn refresh:byte, scbattr:byte, low_rgt:word, vtemu:byte extrn vtroll:byte, tekflg:byte ; structure for status information table sttab. stent struc sttyp dw ? ; type (actually routine to call) msg dw ? ; message to print val2 dw ? ; needed value: another message, or tbl addr tstcel dw ? ; address of cell to test, in data segment basval dw 0 ; base value, if non-zero stent ends setktab db 0 ; superceded by msuibm code, return 0 here setkhlp db '$' ; and add empty help string savsci dd ? ; old serial port interrupt vector. sav232 dd ? ; Original Bios Int 14H address, in Code seg. savirq db ? ; Original Interrupt mask for IRQ ; brkval db BRKBIT ; What to send for a break. brkadr dw 0 ; Where to send it. modem mdminfo <> hngmsg db cr,lf,' The phone or network connection should have hungup.' db cr,lf,'$' nohngmsg db cr,lf,' Command ineffective on this port.',cr,lf,'$' hnghlp db cr,lf,' The modem control lines DTR and RTS for the current' db ' port are forced low (off)' db cr,lf,' to hangup the phone. Normally, Kermit leaves them' db ' high (on) when it exits.',cr,lf db ' For networks, the active session is terminated.',cr,lf,'$' erms40 db cr,lf,'?Warning: Unrecognized baud rate',cr,lf,'$' badbd db cr,lf,'Unimplemented baud rate$' prterr db '?Unrecognized value$' badprt db cr,lf,' Serial port COM$' badprt2 db ' is not available.$' badprt3 db cr,lf,' Notice: Port COM1 uses hardware addresses of COM2' db ' (safe).',cr,lf,'$' biosmsg db cr,lf,'This port operates through the Bios',cr,lf,'$' msmsg1 db cr,lf,' Modem is not ready: DSR is off$' 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$' ;;;;;;;;;;;;;;;;;;;;;;;;;;;;; NEC Specific data follows machnam db 'NEC APC III (a)$' First db true ; used in getbaud source db 20 DUP(?) ; Buffer for data from port; see comments db bufsiz DUP(?) ; in serini for why this must be bufsiz+20 uart db 01001110B ; set up various parameters.... ; | | | | ; | | | +--- Clock 10 x16, 11 x64 ; | | +----- Word Length 00 5, 01 6,10 7, 11 8 ; | +------- Parity 00 None, 01 Odd, 11 Even ; +--------- Stop Bits 01 1, 10 1.5, 11 2 stnorm db 00100111B ; This will be CL for serini, normally RFG stbrk db 00101111B ; This will send a break from serini RFG stdtr db 00000101B ; This will drop the DTR and RTS line RFG stoff db 00100010B ; This kills send and receive enable RFG ; ||||||+--- Send enable ; |||||+---- DTR on ; ||||+----- Receive enable ; |||+------ Force spacing on output (for break) ; ||+------- Error request ; |+-------- Request to send ; +--------- Interrrupt reset saybr db escape,'[25;0H' db escape,'[35mBreak sent. . .',escape,'[0m$' initfail db cr,lf,escape,'[31mSerial port could not be initialized',escape,'[m$' outfail db cr,lf,escape,'[31mTime out on send via serial port',escape,'[m$' intfail db cr,lf,escape,'[31mTime out on receive via serial port',escape,'[m$' inbfail db cr,lf,escape,'[31mSerial port receive buffer overflow',escape,'[m$' mlcurat db ? ; used for the mode line cursor attributes clreol db escape,'[0K$' ; Clear to end of line....... blank db escape,'[H',escape,'[J$' ; Home cursor, then Clear screen.... ;;;;;;;;;;;;;;;;;;;;;;;;;;;; End of NEC specific stuff crlf db cr,lf,'$' delstr db BS,BS,' ',BS,BS,'$' ; Delete string clrlin db cr,'$' ; Clear line (just the cr part). onmsg db 'on$' offmsg db 'off$' clone db 0 ; clone flag (0 = real, 'B' = system Bios, ; 'N' = NetBios/network) portin db 0 ; Has comm port been initialized xofsnt db 0 ; Say if we sent an XOFF. xofrcv db 0 ; Say if we received an XOFF. parmsk db ? ; parity mask, 0ffh for no parity, 07fh with. flowoff db ? ; flow-off char, Xoff or null (if no flow) flowon db ? ; flow-on char, Xon or null overrun db ? ; holds status of receiver overrun pcwcnt dw 240 ; number of loops for 1 millisec in pcwait temp dw 0 tempsci dw 0 ; temp storage for serint tempdum dw 0 ; temp storage for serdum rdbuf db 80 dup (?) ; temporary storage ; 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 vttbl db 13 ; twelve entries. mkeyw 'Character-set',chaval mkeyw 'Color',200H ; screen fore/back colors; 200H=marker mkeyw 'Cursor-style',curval mkeyw 'Heath-19',ttheath+100H ; note 100H flag for decoding here ; mkeyw 'Keyclick',keyval ; NEC can't do internally mkeyw 'Margin-bell',marval mkeyw 'None',ttgenrc+100H mkeyw 'Newline',newval mkeyw 'Rollback',400h ; note 400H flag for decoding ; mkeyw 'Screen-background',scrval ; NEC keep black back mkeyw 'Tabstops',tabval mkeyw 'Tek4010',tttek+100H mkeyw 'VT102',ttvt100+100H mkeyw 'VT52',ttvt52+100H mkeyw 'Wrap',wraval scrtab db 02H ; screen attributes mkeyw 'normal',00H mkeyw 'reverse',01H curtab db 02H ; cursor attributes mkeyw 'block',00H mkeyw 'underline',01H chatab db 02H ; character set (pound sign choice) mkeyw 'UK-ascii',01H mkeyw 'US-ascii',00H ; US ASCII is default (0). tabtab db 02H ; label says it all! mkeyw 'at',0FFH ; For setting tab stops. mkeyw 'Clear',00H ; For clearing tab stops. alltab db 02H ; more tab command decoding mkeyw 'all',00H mkeyw 'at',01H vtable dw ontab, curtab, chatab, ontab, ontab, ontab, scrtab, 0 vtsflg equ this byte ; define small digits xxxval newval equ $-vtsflg ; and mask for bit in byte db vsnewline curval equ $-vtsflg db vscursor chaval equ $-vtsflg db vsshift3 keyval equ $-vtsflg db vskeyclick wraval equ $-vtsflg db vswrap marval equ $-vtsflg db vsmarginbell scrval equ $-vtsflg db vsscreen numflgs equ $-vtsflg tabval equ $-vtsflg db 0 vtrtns dw numflgs dup (flgset), tabset ; dispatch table for vtsflg clrset db ? ; Temp for SET Term Tabstops xxx tmptabs db 132 dup (?) ; Temporary for unconfirmed tabs. vthlp db ' one of the following:',cr,lf db ' terminal types of: None, Heath-19, Tek4010,' db ' VT52, or VT102',cr,lf db ' Newline-mode Cursor-style Character-set (US UK)',cr,lf db ' Tabstops Wrap (long lines) Color (of connect screen)' db cr,lf,' Roll (undo screen roll back before writing new chars,' db ' default=off)',cr,lf db ' Margin-bell' db '$' clrhlp db ' one of the following:' db cr,lf,' AT #s (to set tabs at column #s)' db cr,lf,' Clear AT #s or Clear ALL (to clear tabstops)' db cr,lf,' Ex: Set Term Tab at 10, 20, 34 sets tabs' db cr,lf,' Ex: Set Term Tab Clear at 9, 17, 65 clears tabs$' allhlp db ' one of the following:' db cr,lf,' AT #s (to clear at specific columns)' db cr,lf,' ALL (to clear all tabstops)$' tbshlp db ' column number of tab stop to set, 1 to screen width-1$' tbchlp db ' column number of tab stop to clear, 1 to screen width-1$' tbserr db cr,lf,'?Column number is not in range 1 to screen width-1$' ;;;;;;;;;;;;;;;;;;;; modified for the realities of the APC III colhlp db cr,lf,' Color of: ' db escape,'[34mblue ' db escape,'[31mred ' db escape,'[35mmagenta ' db escape,'[32mgreen ' db escape,'[36mcyan ' db escape,'[33myellow ' db escape,'[37mwhite' db escape,'[0m$' colltb db 7 ; 7 entries mkeyw 'Blue',nec_blue mkeyw 'Cyan',nec_cyan mkeyw 'Green',nec_green mkeyw 'Magenta',nec_magenta mkeyw 'Red',nec_red mkeyw 'White',nec_white mkeyw 'Yellow',nec_yellow ;;;;;;;;;;;;;;;;;;;; end of NEC colors vtwrap db ' Term wrap-lines: $' vtbell db ' Term margin-bell: $' vtnewln db ' Term newline: $' vtcur db ' Term cursor-style: $' vtcset db ' Term character-set: $' ; vtclik db ' Term key-click: $' ; vtscrn db ' Term screen-background: $' colst1 db ' Term color foreground:3$' ; colst2 db ' background:4$' ; terminal emulator vtstbl stent ; VT100 line wrap stent ; VT100 margin bell stent ; VT100 cursor type stent ; VT100 newline ; stent ; VT100 screen stent ; VT100 character set ; stent ; VT100 keyclick stent ; VT100 colors stent ; VT100 tab status - needs one whole line dw 0 ; end of table ; end of Terminal data set ontab db 2 ; Two entries. mkeyw 'off',0 ; Should be alphabetized mkeyw 'on',1 comptab db 6 ; six entries for NEC mkeyw '1',1 mkeyw '2',2 mkeyw '3',3 mkeyw 'AUX',1 mkeyw 'AUX2',2 mkeyw 'AUX3',3 ; this table is indexed by the baud rate definitions given in ; pcdefs. Unsupported baud rates should contain FF. baudtab db 0FFH ; 45.5 db 0FFH ; 50 db 0 ; 75 db 0FFH ; 110 db 0FFH ; 134.5 db 1 ; 150 db 2 ; 300 db 3 ; 600 db 4 ; 1200 db 0FFH ; 1800 db 0FFH ; 2000 db 5 ; 2400 db 6 ; 4800 db 7 ; 9600 db 0FFH ; 19.2k db 0FFh ; 38.4k db 0FFh ; 57.6k db 0FFh ; 115.2k nbaud equ $-baudtab ; variables for serial interrupt handler ; BIOS handles the buffer; count not used RFG count dw 0 ; Number of chars in int buffer. mdstreg db 0 ; Modem status register, current. datas ends code segment public 'code' extrn comnd:near, dopar:near, defkey:near, lclyini:near extrn sleep:near, atsclr:near, scrseg:near,scrloc:near, scrsync:near extrn atoi:near, strlen:near, prtscr:near, scroff:near, scron:near extrn anstat:near ; RFG assume cs:code,ds:datas int_rs232 macro ; this is necessary since we need to local rs1,rs2 ; to use the 1A interrupt if we have cmp flags.comflg,1 ; only one port, and 1E if we have more je rs1 push si ; a necessary save push bx ; a short save mov bh,0 mov bl,flags.comflg ; get the port number sub bl,1 ; put it into NEC terms mov si,bx ; then into the right place pop bx ; and restore int 1EH ; now the multi-choice interrupt pop si ; and restore jmp rs2 rs1: int 1AH rs2: nop endm ; local initialization lclini proc near mov flags.comflg,1 ; assume COM1 for communications port ; call coms2 ; setup serial port modem.info for COM1 RFG ; call model ; get model of IBM machine RFG call lclyini ; let other modules initialize too... ret lclini endp ; this is called by Kermit initialization. It checks the ; number of disks on the system, sets the drives variable ; appropriately. Returns normally. ; From RAL Version 2.0 RFG 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. dodsk0: mov drives,al ; Remember how many. ret DODISK ENDP ; Returns normally. Obsolete, name here for external reference only. showkey proc near ret ; return showkey endp ; SHOW MODEM, displays current status of lines DSR, CD, and CTS. ; Uses byte mdstreg, the modem line status register. [jrd] shomodem proc near mov ah,cmcfm ; get a confirm call comnd jmp r ; no confirm nop mov ah,6 ; status request - NEC code follows int_rs232 ; go get the answer and ch,80h ; CH bit 7 Data set ready xor cl,0FFh ; CL bit 6 Clear to Send = 0 and cl,60h ; 5 Carrier detect = 0 or ch,cl ; lump the answer together mov mdstreg,ch ; and save it mov ah,prstr mov dx,offset msmsg1 ; modem ready msg test mdstreg,80h ; 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,20h ; 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,40h ; CTS asserted? jz shomd3 ; z = no mov dx,offset msmsg6 ; say not asserted shomd3: int dos jmp rskp shomodem 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. ; On the NEC, where the buffer is (really) managed by the BIOS, we could ; clear it by calling serini or blindly reading everything out, RFG CLRBUF PROC NEAR clrb2: mov ah,2 ; Get data length in CX...Page SE-12 int_rs232 ; Call APC ROM BIOS clrb4: or ch,cl ; check for zero in both halfs of CX cmp ch,0 ; is CH 0? je clrb1 ; If zero then buffer is clear else mov ah,4 ; Receive Character...by way of NEC BIOS int_rs232 jmp clrb2 clrb1: ret CLRBUF ENDP ; Clear to the end of the current line. Returns normally. RFG CLEARL PROC NEAR push ax push dx mov dx,offset clreol mov ah,prstr int dos pop dx pop ax ret CLEARL ENDP ; This routine blanks the screen. Returns normally. CMBLNK PROC NEAR mov ah,prstr mov dx,offset blank int dos ret CMBLNK ENDP ; Locate: homes the cursor. Returns normally. LOCATE PROC NEAR mov dx,0 ; Go to top left corner of screen. jmp poscur LOCATE ENDP ; Position the cursor according to contents of DX: ; DH contains row, DL contains column. Returns normally. POSCUR PROC NEAR push ax push bx push si ; NEC mov ah,2 ; Position cursor. mov bh,0 ; page 0 int bios pop si ; NEC pop bx pop ax ret POSCUR ENDP ; Delete a character from the terminal. This works by printing ; backspaces and spaces. Returns normally. DODEL PROC NEAR mov ah,prstr mov dx,offset delstr ; Erase weird character. int dos ret DODEL ENDP ; Move the cursor to the left margin, then clear to end of line. ; Returns normally. CTLU PROC NEAR mov ah,prstr mov dx,offset clrlin int dos call clearl ret CTLU ENDP ret BEEP PROC NEAR ; NEC version mov dl,bell mov ah,conout int dos ret BEEP ENDP ; write a line in inverse video at the bottom of the screen... ; the line is passed in dx, terminated by a $. Returns normally. ; This is only used for the send/receive mode lines. RFG putmod proc near push ax ; save regs push bx push cx push dx ; preserve message call anstat ; get the screen attributes RPG mov bh,ah ; mlbattr returned in ah mov mlcurat,ah ; and put it in mlcurat mov cx,1800h ; from line 24, column 0 mov dx,184fh ; to line 24, column 79 mov ax,600h ; do a scroll up int bios mov dx,1800h ; now address line 24 call poscur pop si ; get message back (from dx push) mov cx,1 ; only one char at a time xor bh,bh ; page 0 putmo1: lodsb ; get a byte cmp al,'$' ; end of string? je putmo2 push si ; save si push ax ; and the char call poscur inc dl ; increment for next write pop ax ; recover char mov ah,9 ; try this mov bl,mlcurat ; page 0, inverse video mov bh,0 int bios pop si ; recover pointer jmp putmo1 putmo2: pop cx pop bx pop ax ret putmod endp ; clear the mode line written by putmod. Returns normally. ; separate out the text attributes RFG clrmod proc near push ax push bx push cx push dx call anstat ; get the screen attributes RPG mov bh,al ; scbattr returned in al mov cx,1800h ; from line 24, column 0 mov dx,184fh ; to line 24, column 79 mov ax,600h ; do a scroll up int bios pop dx pop cx pop bx pop ax ret clrmod endp ; put a help message on the screen. This one uses reverse video... ; pass the message in ax, terminated by a null. Returns normally. ; separate out text attributes puthlp proc near push bx ; save regs. [jrd] push cx push dx push si push ax ; preserve this cld mov si,ax ; point to it mov dh,1 ; init counter puthl1: lodsb ; get a byte cmp al,lf ; linefeed? jne puthl2 ; no, keep going inc dh ; count it jmp puthl1 ; and keep looping puthl2: cmp al,0 ; end of string? jne puthl1 ; no, keep going; call anstat ; get screen attributes RPG mov bh,ah ; mlbattr returned in ah mov mlcurat,ah ; and save it mov ax,600h ; scroll to clear window xor cx,cx ; from top left mov dl,4fh ; to bottom right of needed piece int bios call locate ; home cursor mov bh,0 ; Page 0 mov bl,mlcurat mov cx,1 ; one char at a time cld ; scan direction is forward [jrd] pop si ; point to string again puthl3: lodsb ; get a byte cmp al,0 ; end of string? je puthl4 ; yes, stop push si ; save around bios call cmp al,' ' ; printable? jb puth21 ; b = no mov ah,9 ; write char at current cursor position [jrd] int bios ; do the Bios int 10h call inc dl ; point to next column jmp puth23 ; move cursor there puth21: cmp al,cr ; carriage return? jne puth22 ; ne = no xor dl,dl ; set to column zero jmp puth23 puth22: cmp al,lf ; line feed? jne puth23 inc dh ; go to next line puth23: mov ah,2 ; set cursor position to dx int bios pop si ; restore pointer [jrd] jmp puthl3 ; and keep going puthl4: mov dx,24 * 100H ; go to last line call poscur ; position cursor pop si ; [jrd] pop dx pop cx pop bx ret puthlp endp ; begin Terminal set & status code ; SET Term parameters, especially for use with VT100 emulator. [jrd] ; Taken from work done originally by James Harvey IUPUI. ; VTS is called only by mssset to set terminal type and characteristics. VTS proc near ; SET TERM whatever mov ah,cmkey ; Parse another keyword. mov bx,offset vthlp ; Use this help mov dx,offset vttbl ; Use this table call comnd jmp r ; Vsetup always returns +1. cmp bh,1H ; marker for terminal type? je vsetu0a ; e = yes cmp bh,4H ; marker for roll back control? je vsetu3 ; e = yes cmp bh,2h ; marker for set term color? je vsetu2 ; e = yes jmp short vsetu1 ; else dispatch on bl vsetu0a:push bx ; yes mov ah,cmcfm call comnd ; Get a confirm. jmp vsetu0 ; Didn't get a confirm. nop pop bx mov flags.vtflg,bl ; Set the terminal emulation type mov tekflg,0 ; clear Tek sub mode ret vsetu0: pop bx ret vsetu3: mov ah,cmkey ; Set Term Roll On/Off, auto roll back mov bx,0 ; Use on/off table as help mov dx,offset ontab ; Use on/off table call comnd jmp r ; bad keyword push bx mov ah,cmcfm ; get a confirm call comnd jmp vsetu0 ; did not get a confirm nop pop bx mov vtroll,bl ; set roll state (0=no auto rollback) jmp rskp ; return successfully vsetu1: sal bx,1 ; Make bx a word index. call vtrtns[bx] ; Dispatch. jmp r ; Vsetup always returns +1. jmp r ; Vsetup always returns +1. ; Set Term Color foreground, background vsetu2: mov ah,cmkey ; COLOR - get value mov bx,offset colhlp ; use this help text mov dx,offset colltb ; parse by this table call comnd jmp r push bx ; save it cmp ah,0 ; any response jne vsetu2a ; ne = yes jmp vsetux ; else give not confirmed msg vsetu2a: pop ax ; get value mov bx,vtemu.att_ptr ; address of attributes byte mov byte ptr [bx],al ; put the color in (plain, otherwise) jmp rskp vsetux: pop bx ; throw away jmp r ; and exit complaining ; SET Term flags. These are the (near) equivalent of VT100 Setup mode values. flgset: push bx ; Save bx for a second. mov ah,cmkey ; Another keyword. mov dx,vtable[bx] ; The table to use. mov bx,0 ; Use default help. call comnd jmp flgse3 push bx ; Save switch value. mov ah,cmcfm ; Confirm it. call comnd jmp flgse2 pop dx ; Restore switch value. pop bx ; And index. sar bx,1 ; Make it a byte index. mov al,vtsflg[bx] ; Get the flag. cmp dx,0 ; Set or clear? je flgse1 ; Go clear it. or vtemu.vtflgst,al ; Set the flag. or vtemu.vtflgop,al ; in runtime flags too jmp rskp ; Give good return. flgse1: not al ; Complement and vtemu.vtflgst,al ; Clear the indicated setup flag. and vtemu.vtflgop,al ; Clear the indicated runtime flag. jmp rskp ; Give good return. flgse2: pop bx ; error exits flgse3: pop bx ret ; SET Term Tabstops Clear ALL ; SET Term Tabstops Clear AT n1, n2, ..., nx ; SET Term Tabstops At n1, n2, ..., nx tabset: cld ; Make sure this is clear. mov di,offset tmptabs ; clear our temp work area here. mov cx,132 ; 132 columns mov al,0 ; set "not touched" indicator rep stosb ; in all tmptabs slots mov ah,cmkey ; Parse keyword. mov bx,offset clrhlp ; Use this help text. mov dx,offset tabtab ; This table. call comnd jmp r mov clrset,2 ; code for set a tab cmp bl,0 ; Was it set or clear? jne tabse1 ; SET - go parse column number(s). mov clrset,1 ; code for clear at/all tab(s) mov ah,cmkey ; CLEAR - parse ALL or AT mov bx,offset allhlp ; Use this help text. mov dx,offset alltab ; Parse ALL or AT. call comnd jmp r cmp bx,0 ; ALL? jne tabse1 ; ne = AT, clear at specific places. mov al,1 ; ALL, means clear all tab stops. mov cx,132 ; use 132 columns mov di,offset tmptabs rep stosb mov ah,cmcfm ; Confirm it. call comnd jmp r jmp tabcpy ; update active & coldstart tabs tabse1: mov dx,offset tbshlp ; Tell them we want a column number. cmp clrset,1 ; Clearing? jne tabse2 ; ne = Set. we guessed right on help. mov dx,offset tbchlp ; Yes - use this help instead. tabse2: mov ah,cmtxt ; get text w/o white space mov bx,offset rdbuf ; temp buffer call comnd jmp r cmp ah,0 ; anything given? jne tabse4 ; ne = yes. jmp r ; else give not confirmed msg tabse4: mov ah,cmcfm ; Parse confirm mov bx,0 ; Use default help. call comnd jmp r ; not confirmed, complain. mov si,offset rdbuf ; si = place where atoi wants text tabse5: mov dx,si call strlen ; current length of text mov ah,cl ; put length where Atoi wants it jcxz tabcpy ; nothing left call atoi ; convert text to numeric in ax jmp tabcpy ; no number available mov bx,ax ; for subscripting in code below dec bx ; Put column in range 0-79 cmp bx,0 ; check range (1-80 --> 0-79) jl tbsbad ; l = too small. complain cmp bl,132-1 ; more than the right most column? jna tabse3 ; na = no, is ok tbsbad: mov ah,prstr ; Not in range - complain and exit. mov dx,offset tbserr int dos jmp rskp tabse3: mov al,clrset ; Get value for setting or clearing. mov tmptabs[bx],al ; store in tabs temp work array jmp short tabse5 ; look for more tabcpy: mov cx,132 ; update all active tab stops mov si,vtemu.vttbst ; in terminal emulator's active buffer mov di,vtemu.vttbs ; and in the cold-start buffer. mov bx,0 ; subscript tabcpy1:mov al,byte ptr tmptabs [bx] ; get a table entry into al or al,al ; what is the code? jz tabcpy3 ; z = do not touch cmp al,2 ; set a tab? je tabcpy2 ; e = set the tab mov byte ptr [bx+si],0 ; clear the tab mov byte ptr [bx+di],0 ; clear the tab jmp short tabcpy3 tabcpy2:mov byte ptr [bx+si],0ffh ; set the tab mov byte ptr [bx+di],0ffh ; set the tab tabcpy3:inc bx ; inc subscript loop tabcpy1 jmp rskp ; Give good return. VTS endp ; end of Set Term things. ; Terminal Status display, called within STAT0: in MSSSET.[jrd] VTSTAT proc near ;enter with di within sttbuf, save bx, di push bx push di mov bx,ds mov es,bx cld mov bx,offset vtstbl ; table of things to show xor cx,cx vtsta1: cmp word ptr [bx],0 ; end of table? je vtstax ; e = yes push bx call [bx].sttyp ; call appropriate routine pop bx ; cx incremented by output count cmp cx,38 ; place for second display jbe vtsta2 ; le = only half full mov dx,offset crlf ; over half full. send cr/lf mov ah,prstr int dos xor cx,cx ; say line is empty now jmp short vtsta4 vtsta2: mov ax,cx mov cx,38 ; where we want to be next time sub cx,ax ; compute number of filler spaces jcxz vtsta4 ; nothing to do mov ah,conout mov dl,' ' vtsta3: int dos ; fill with spaces loop vtsta3 ; do cx times mov cx,38 ; current column number vtsta4: add bx,size stent ; look at next entry jmp vtsta1 ; and do it vtstax: pop di pop bx ret ; return to STAT0: in MSSSET. ; foreground/background color status colstat proc near mov dx,offset colst1 mov ah,prstr int dos ; print first part of msg mov bx,vtemu.att_ptr ; pointer to attributes byte mov al,byte ptr [bx] and al,0E0H ; color bits only, please mov ah,0 mov bx,offset colltb call prttab add cx,18 ; about the # columns we used ret colstat endp ; Tabs Status display tabstat proc near ; display tabs ruler for Status push dx jcxz tabsta0 ; empty line, as it should be xor cx,cx ; used line, empty it mov dx,offset crlf ; cr, lf mov ah,prstr int dos tabsta0:mov si,vtemu.vttbst ; active tabs address, not shadow mov cl,byte ptr low_rgt ; loop screen width-1 times xor ch,ch ; clear high byte dec si ; dec for inc below xor ax,ax ; tens counter tabsta1:mov dl,0F9H ; default position symbol ( mid-dot ) inc si ; start with position 1 inc al cmp al,10 ; time to roll over? jb tabsta2 ; b = not yet mov al,0 ; modulo 10 inc ah mov dl,ah ; display a tens-digit add dl,'0' cmp dl,'9' ; larger than 90? jbe tabsta2 ; be = no sub dl,10 ; roll over to 0, 1, etc tabsta2:cmp byte ptr [si],0 ; is tab set? je tabsta3 ; e = no mov dl,'T' ; yes, display a 'T' tabsta3:push ax mov ah,conout ; console output int dos pop ax loop tabsta1 ; loop til done (cx has count) pop dx mov cx,38 ; say line is used ret tabstat endp ; handler routines for status. All are called with bx/ stat ptr. onoff proc near call stmsg ; print the message mov si,[bx].basval ; get base value cmp si,0 ; any there? je onoff1 ; e = no mov si,[si] ; yes, use as base address onoff1: add si,[bx].tstcel ; add offset of test cell mov al,[si] mov dx,offset onmsg add cx,2 ; assume two byte on message or al,al ; test value jnz onoff2 ; nz = on mov dx,offset offmsg inc cx ; three byte message onoff2: mov ah,prstr ; display the message int dos ret onoff endp ; search a keyword table for a bit value, print that value. [jrd] srchkb proc near call stmsg ; first print message call stbval ; get bit set or reset mov ah,0 ; al has 0/1, high order is 0 mov bx,[bx].val2 ; this is table address jmp prttab ; and look in table. srchkb endp ; get address of test value in stent. Returns address in si. [jrd] stbval proc near mov si,[bx].basval ; get address of test value cmp si,0 ; any there? je stbva1 ; no, quit with no match mov al,byte ptr [si] ; get byte value mov ah,0 test al,vtemu.vtflgop ; bit test value against emulator flags byte jz stbva1 ; z = they don't match mov al,1 ; match ret stbva1: mov al,0 ; no match ret ; and return it stbval endp ; get address of test value in stent. Returns address in si stval proc near mov si,[bx].basval ; get base value cmp si,0 ; any there? je stva1 ; no, keep going mov si,[si] ; yes, use as base address stva1: add si,[bx].tstcel ; add offset of test cell ret ; and return it stval endp ; copy the message to the screen stmsg proc near mov si,[bx].msg ; get message address stms1: lodsb ; get a byte cmp al,'$' ; end of message? je stms2 ; e = yes mov dl,al ; display the character mov ah,conout int dos inc cx ; count output chars jmp stms1 stms2: ret stmsg endp ; Print value from table. BX/address of table, AL/value of variable. prttab: push cx ; save column count mov cl,[bx] ; Number of entries in our table. inc bx ; Point to the data. prtt0: mov dl,[bx] ; Length of keyword. inc bx ; Point to keyword. mov dh,0 inc dx ; Account for "$" in table. mov si,dx ; Put to index register. cmp ax,[bx+si] ; Is this the one? je prtt1 add bx,dx ; Go to end of keyword. add bx,2 ; Point to next keyword. dec cl ; Any more keywords to check? jnz prtt0 ; Yes, go to it. mov bx,offset prterr prtt1: mov si,bx pop cx ; recover column count jmp stms1 ; copy in message ret ; and return VTSTAT endp ; end of Terminal set & status code ; Wait for the # of milliseconds in ax ; Thanks to Bernie Eiben for this one. ; Recalibrated for 8 MHz clock on NEC -- RFG pcwait proc near mov cx,300 ; inner loop counter for 1 millisecond ; was 240 for IBM PC 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 ; set the current port. ; modified to use all 3 ports RFG COMS PROC NEAR mov dx,offset comptab mov bx,0 mov ah,cmkey call comnd jmp r push bx mov ah,cmcfm call comnd ; Get a confirm. jmp comx ; Didn't get a confirm. nop pop bx mov flags.comflg,bl ; Set the comm port flag. cmp flags.comflg,1 ; Using Com 1? jne coms0 ; Nope. mov ax,offset port1 mov portval,ax ret coms0: cmp flags.comflg,2 ; Using Com 2? jne coms1 ; Nope. mov ax,offset port2 mov portval,ax ret coms1: cmp flags.comflg,3 ; Using Com 3? jne comx ; this can't be! mov ax,offset port3 mov portval,ax ret comx: pop bx ret COMS ENDP ; Test presently selected serial port for having a real 8250 UART. ; Return carry clear and clone = 0 if 8250 present, ; else carry set and clone = 'B' for system Bios or ; carry set and clone = 'N' for network. ; Method is to check UART's Interrupt Identification Register for high ; five bits being zero; IBM does it this way. Assumes port structure ; has been initialized with addresses of UART. 21 Feb 1987 [jrd] ; 29 May 1987 Add double check by reading Line Status Register. [jrd] chkport proc near chkport endp ; Set the baud rate for the current port, based on the value ; in the portinfo structure. Returns normally. ; lifted from the RAL version 2.0 RFG ; This routine should set the baud rate for the current port but it ; is actually done in SERINI. dobaud proc near push si ; [jrd] push bx mov bx,portval mov si,[bx].baud ; get baud rate index pointer.. pop bx mov al,baudtab[si] ; load up baud rate......... pop si ; [jrd] cmp al,0FFH ; Is Baud Rate Possible?? je badbaud call serini ; Simply re-init port with new baud rate dbret: ret BadBaud: mov ah,prstr ; MS-DOS Print String... mov dx,offset badbd ; point at message int DOS jmp dbret dobaud 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. ; lifted from RAL version 2.0 RFG ;* RAL..This routine appears to be called every time a status is done. ;* I will set baud rate first time, and simply return from then on. ;* ;* Page SA-2 APC III Programmer Reference Manual GETBAUD PROC NEAR push ax ; addition to fix (bug) in msster RFG push bx mov al,First ; Check to see if this is the first time.... cmp al,false je GBRET ; Quit if baud rate already known..... mov First,False ; Flip Flag... mov bx,portval mov [bx].baud,0Dh ; Default to 9600 Baud..... call serini ; Set up port........ GBRET: pop bx pop ax ret GETBAUD ENDP ; Get Char from serial port buffer. ; skip returns if no character available at port, ; otherwise returns with char in al, # of chars in buffer in dx. ; Revised 22 May 1986, and again slightly 2 August 1986 by [jrd] ; 21 Feb 1987 Add support for Bios calls (Clone) [jrd] ; 25 April 1987 Add Netbios support, remove test for NUL and DEL. [jrd] ; partially taken from RAL version 2.0 ; use call for all 3 RS232 ports RFG PRTCHR PROC NEAR push cx push bx mov ah,2 ; Get data length in CX...Page SE-12 int_rs232 ; Call APC ROM BIOS or ch,cl ; check for zero in both halfs of CX cmp ch,0 ; is CH 0? je prtcn ; give up if no characters........ mov ah,4 ; Receive Character...by way of NEC BIOS int_rs232 cmp ah,0 ; check return status je prtc1 ; 0 = everything normal ; 1 = port not initialized ; 2 = (receive) buffer overflow ; 3 = timed out call beep ; say something cmp ah,2 je prtc2 mov ah,prstr ; say timed out mov dx,offset intfail int dos jmp prtcx prtc2: mov ah,prstr ; say buffer overflow mov dx,offset inbfail int dos jmp prtcx prtc1: mov al,ch ; Character is returned in CH.... prtcx: pop bx pop cx ret prtcn: ; no characters in queue, check console pop bx pop cx jmp rskp PRTCHR ENDP ; Network Receive packet routine. Request a net packet with no-wait option. ; Return carry clear if success. If failure, reset serial port (Server mode ; reinits serial port) and return carry set. No entry setup needed. RECEIVE PROC NEAR ; receive network session pkt RECEIVE ENDP ; Network Receive post processing interrupt routine. ; Copy chars from rcvbuf to circular buffer source, act on xon/xoff, ; clear rposted interlock flag. At entry, CS is our code segment, ; es:bx points to scb, netbios stack, interrupts are off. RPOST PROC FAR ; network receive post interrupt routine RPOST endp ; Put the char in AH to the serial port. This assumes the ; port has been initialized. Should honor xon/xoff. Skip returns on ; success, returns normally if the character cannot be written. ; 21 Feb 1987 Add support for Bios calls (Clone) [jrd] ; 25 April 1987 Add Netbios support [jrd] ; 16 May 1987 Add entry point OUTCH2 for non-flow controlled sending to ; prevent confusion of flow control logic at top of outchr; used by receiver ; buffer high/low water mark flow control code. [jrd] ; XON/XOFF is handled by the BIOS an NEC RFG OUTCHR PROC NEAR push dx push bx mov al,ah ; parity works on AH call dopar ; do parity work before sending mov ah,3 ; NEC ROM BIOS send character in AL int_rs232 ; Call ROM BIOS send character in AL cmp ah,0 ; check return status je outc1 ; 0 = everything normal ; 1 = port not initialized ; 2 = (receive) buffer overflow ; 3 = timed out call beep ; say something mov ah,prstr mov dx,offset outfail int dos pop bx pop dx ret ; and return (abnormally?) outc1: pop bx pop dx jmp rskp OUTCHR ENDP ; Network Send packet routine. Send xmt scb with no-wait option. Waits ; up to 6 seconds for current Send to complete before emitting new Send. ; Failure to Send resets serial port (Server mode allows reiniting of serial ; port). Returns carry clear for success, carry set for failure. ; Enter with xmtcnt holding length of data in xmtbuf to be sent. SEND PROC NEAR ; Network. Send session packet SEND ENDP ; Network Send packet completion interrupt routine. At entry CS is our ; code segment, es:bx points to scb, netbios stack, interrupts are off. SPOST PROC NEAR ; post routine for Send packets SPOST ENDP ; dispatch prebuilt network session scb, enter with bx pointing to scb. ; returns status in al (and ah too). Allows STARLAN Int 2ah for netint. SESSION PROC NEAR SESSION ENDP ; Make a virtual circuit Session, given preset scb's from proc chknet. ; For Server mode, does a Listen to '*', otherwise does a Call to indicated ; remote node. Updates vcid number in scb's. Shows success or fail msg. ; Updates network status byte pcnet to 2 if session is established. ; Does nothing if a session is active upon entry; otherwise, does a network ; hangup first to clear old session material from adapter board. This is ; the second procedure to call in initializing the network for usage. SETNET PROC NEAR ; Network, make a connection SETNET ENDP ; Called only when Kermit exits. Name passed to mssker by proc chknet ; in word netdone. NETCLOSE PROC NEAR ; close entire network connection NETCLOSE ENDP ; Start connection process to network. Obtains Network board local name ; and appends '.K' to form Kermit's local name (removed when Kermit exits). ; If no local name is present then use name 'mskermit.K'. ; Sets local name in scb's for xmt, rcv, lsn. (Does not need DOS 3.x) ; Sets NETDONE pointer to procedure netclose for Kermit exit. ; Verifies existance of interrupt 5ch support, verifies vendor specific ; support for BREAK and other features, sets network type bit in nettype, ; sets BREAK support in nsbrk, hangsup old session if new node name given, ; fills in local and remote node names and name number in scbs (including ISN ; names for STARLAN), and sets network status byte pcnet to 0 (no net) or ; to 1 (net ready). This is the first procedure called to init network usage. ; Byte count of new host name is in temp from COMS. chknet proc near chknet endp ; local routine to see if we have to transmit an xon ; its handled by the hardware on the NEC RFG chkxon proc near chkxon 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] ; 22 June 1986 Don't send null char if not using flow control. [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 ; check for null char jz ihostr1 ; z = null, don't send it 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 ; check for null char jz ihostr1 ; z = null, don't send it 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 ; Send a break out the current serial port. Returns normally. ; an APC specific version RFG SENDBR PROC NEAR push dx push cx push ax mov ah,prstr ; tell the user on the status line mov dx,offset saybr ; that we're sending it int dos mov ah,5 ; set the break bit mov al,stbrk int_rs232 mov ax,275 ; # of ms to wait call pcwait ; hold break for desired interval mov ah,5 ; and clear the break bit mov al,stnorm int_rs232 pop ax pop cx pop dx ret SENDBR ENDP SENDBL PROC NEAR ; Send a long break push dx push cx push ax mov ah,prstr ; tell the user on the status line mov dx,offset saybr ; that we're sending it int dos mov ah,5 ; set the break bit mov al,stbrk int_rs232 mov ax,1800 ; # of ms to wait call pcwait ; hold break for desired interval mov ah,5 ; and clear the break bit mov al,stnorm int_rs232 pop ax pop cx pop dx ret SENDBL ENDP ; Initialization for using serial port. This routine performs ; any initialization necessary for using the serial port, including ; setting up interrupt routines, setting buffer pointers, etc. ; Doing this twice in a row should be harmless (this version checks ; a flag and returns if initialization has already been done). ; SERRST below should restore any interrupt vectors that this changes. ;************* RAL ***************************************************** ;* Page SE-10 MS-DOS Programmers Manual ;* Performs Serial Port Initialization............. ;*********************************************************************** ; Various mods to allow 3 ports and setting timeout parameters so that we ; won't hang forever if the line dies. RFG SERINI PROC NEAR call serrst ; Turn off the unused ports to avoid ; characters coming in and causing a ; d.e.l.a.y.e.d CRASH push es push di push si ; additional save RFG mov AX,datas ; point at start of this segement? mov ES,AX mov DI,offset source ; Point at Serial Buffer.... mov bx,portval mov parmsk,0ffh ; parity mask, assume parity is None. [jrd] cmp [bx].parflg,parnon ; is it None? je serin3 ; e = yes mov parmsk,07fh ; no, pass lower 7 bits as data serin3: mov si,[bx].baud ; get baud rate index pointer.. mov ah,[bx].floflg mov al,baudtab[si] ; load up baud rate......... ; AH = 1 XON/XOFF flow control ; AH = 0 No Flow control ; Page SE-10 NEC Programmer Ref manual cmp AH,0 ; doing flow control? je NoFlow ; 0 if not flow control mov ah,1 ; Init with Xon/Xoff NoFlow: mov ch,uart ; set up various UART parameters mov dx,bufsiz ; load with Buffer Size...bufsiz in mssdef.h ; (currently 2048 bytes) ; NB that since the BIOS uses 1 word per char, ; this means the buffer is really only ; bufsiz/2 long. (1 sec at 9600 baud) ; Due to a bug in the BIOS, the size is ; miscalculated by the 20 bytes used at ; the front by the BIOS for pointers, etc.; ; without the pad put into the 'source' ; definition, the handler would simply ; overwrite the following data area. ; This is a circular buffer managed entirely ; by the BIOS with XON set at 3/4 DX and ; XOFF set at 1/4 DX. mov bh,2 ; time out on send is this number *500 ms ; 0 = infinity RFG ; this should /not/ affect waiting for XON ; from the host (handled in BIOS again) mov bl,4 ; time out on receive is this number *500 ms ; 0 = infinity RFG ; since we're checking buffer before we read ; (see prtchr), shouldn't be necessary. mov CL,stnorm ; see NEC Ref Guide, Page SE-11 RFG mov CH,uart ; set up various parameters.... again int_rs232 ; Call NEC Rom cmp ah,0 ; Did everything go ok?? je serinx ; continue if so... call beep ; otherwise, notify the authorities mov ah,prstr mov dx,offset initfail int dos serinx: pop si ; additional restore RFG pop di pop es ret ; We're done. [21c] 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. ; in NEC land, we simply turn everyone OFF. RFG SERRST PROC NEAR push es push di push si mov AX,datas ; point at start of this segement? mov ES,AX mov DI,offset source ; Point at Serial Buffer.... mov ch,uart ; just as a formality mov cl,stoff ; now we turn unused ports dead off 'cause ; if we don't, and come characters come in, ; we get a d.e.l.a.y.e.d crash! mov ah,0 ; initialize port mode mov al,0 ; baud probably irrelevant mov dx,bufsiz ; just to give it a valid number mov bh,0 ; zip to the high byte mov bl,0 ; turn port 1 off mov si,bx int 1EH ; could have used 1AH here mov ch,uart mov cl,stoff mov ah,0 mov al,0 mov dx,bufsiz mov bh,0 mov bl,1 ; turn port 2 off mov si,bx int 1EH mov ch,uart mov cl,stoff mov ah,0 mov al,0 mov dx,bufsiz mov bh,0 mov bl,2 ; turn port 3 off mov si,bx int 1EH pop si pop di pop es ret ; All done. SERRST ENDP ; Dummy Interrupt 14H to defeat DOS interference with serial port when CTTY ; and Kermit use the port simultaneously. If ports differ then chain DOS to ; original Int 14H Bios code. Else return dummy status=ok reports and ; Backspace for Read, ignore char for Write. ; Entered with AH = function request, AL = char to be sent, DX = com port num ; CS is our code segment, DS is DOS's, SS is ours or DOS's, interrupts off. ; 25 June 1987 [jrd] SERDUM PROC FAR SERDUM ENDP ; serial port interrupt routine. This is not accessible outside this ; module, handles serial port receiver interrupts. ; Revised on 22 May 1986, again 2 August 1986 to run at 38.4kb on PC's. [jrd] ; Srcpnt holds offset, within buffer Source, where next rcv'd char goes. ; Count is number of chars now in buffer, and oldest char is srcpnt-count ; done modulo size of Source. All pointer management is handled here. ; Control-G char substituted for char(s) lost in overrun condition. [jrd] ; Upgraded to read cause of interrupt from interrupt ident reg (accepts only ; data ready), chain to old interrupt if source is not our device. [jrd] SERINT PROC FAR SERINT ENDP DTRLOW PROC NEAR ; Global proc to Hangup the Phone or Network ; by making DTR and RTS low (phone). [jrd] 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 call serhng ; drop DTR and RTS mov ah,prstr ; give a nice message mov dx,offset hngmsg int dos jmp rskp DTRLOW ENDP ; 5 April 1987 Add 500 millisec wait with lines low before returning. [jrd] ; Calling this twice without intervening calls to serini should be harmless. ; If network then call nethangup procedure to hangup the session without ; losing local name information. ; Returns normally. serhng proc near ; clear modem's delta status bits and lower DTR & RTS push ax mov ah,5 ; direct to the UART mov al,stdtr ; lower the boom int_rs232 ; drop the DTR mov ax,500 ; hold it low for a bit call pcwait pop ax ret serhng 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 ; Jumping here is the same as a ret. R PROC NEAR ret R ENDP code ends end