Source Code 1992 March

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Assembly Source File | 1988-11-21 | 47.9 KB | 1,193 lines

;====================================================================== ; ENVELOPE: Print envelopes on LaserJet Printers * PC Magazine ;----------------------------------------------------------------------- ; EQUATES ;----------------------------------------------------------------------- LF EQU 0Ah ; Line feed CR EQU 0Dh ; Carriage return ESCAPE EQU 1Bh ; Escape SCAN_CODE EQU 18 ; scan code for E SHIFT_MASK EQU 8 ; shift status for Alt LJ_MODEL EQU 1B ; Printer Flag Bit in status PR_RET_ADD EQU 10B ; Print Return Address Flag ENV_SIZE_BIT EQU 100B ; Envelope Size (Large if set) EGA EQU 1000000B ; EGA Flag INSTALLED EQU 10000000B ; Installed Flag ;----------------------------------------------------------------------- ; EQUATES for Envelope Margins - Note Bytes reversed ;----------------------------------------------------------------------- LMARG_ADD_S EQU "06" ; Left Address Margin - Small LMARG_RET_S EQU "54" ; Left Return Margin - Small LMARG_ADD_L EQU "05" ; Left Address Margin - Large LMARG_RET_L EQU "71" ; Left Return Margin - Large TMARG_RET_S EQU "03" ; Top Return Margin - Small TMARG_RET_L EQU "92" ; Top Return Margin - Large TMARG_RET_2 EQU "61" ; Top Return Margin - Series 2 ;---------------------------------------------------------------------- CSEG SEGMENT PUBLIC 'CODE' ASSUME CS:CSEG,DS:CSEG,ES:CSEG,SS:CSEG ORG 100H START: JMP INSTALL ; install TSR program COPYRIGHT$ DB "ENVELOPE 1.0 Copyright (c) 1988 Ziff Communications Co." DB CR,LF,"PC Magazine ",254," R. M. Saidikowski",CR,LF,"$",26 ;----------------------------------------------------------------------- ; Program Data Area -- Static text first for Residency Check ;----------------------------------------------------------------------- TEXT_UPPER DB "ark Upp",0,"Left ",0 TEXT_LOWER DB "ove Low",0,"Right",0 OLD09H DD 0 ; Holds old Interrupt 09H vector BUSY DB 0 ; busy flag for ENVELOPE ; status byte for ENVELOPE ; bit 0 = LJ Series 2 if set ; bit 1 = Print return address ; bit 2 = Large Envelope ; bit 6 = EGA video adapter ; bit 7 = ENVELOPE installed STATUS DB 00000101B CURLOC DW 0 ; save cursor location VID_PAGE DB 0 ; current video page NUM_COLS DB 80 ; number columns in display LAST_COL DB 79 ; last column number LAST_LINE DB 24 ; last line number ADDR_COLS DB 0 ; columns in address START_COL DB 0 ; starting column for swap UPLEFT DW 0 ; upper left position of box BOTRIGHT DW 0 ; bottom right position of box HILITE_LOC DW 0 ; highlight location of Small PRINT_PORT DW 0 ; 0-2=LPT1-LPT3, 3-6=COM1-COM4 MENU_BLOCK DB 0DAH,7,10 DUP(0C4H,7),0BFH,7,0B3H,7,"M",7,"a",7 DB "r",7,"k",7," ",7,"U",7,"p",7,"p",7,"e",7,"r",7 DB 2 DUP(0B3H,7),"L",7,"e",7,"f",7,"t",7," ",7 DB " ",7,"&",7,17,7,0C4H,7,0D9H,7,0B3H,7,0C0H,7 DB 0C4H,7,"E",7,"s",7,"c",7,"=",7,"E",7,"x",7 DB "i",7,"t",7,0C4H,7,0D9H,7 MENU_PRINT DB 0C9H,7,8 DUP(0CDH,7),0BBH,7,0BAH,7,"F",7,"1",7 DB "-",7,"S",7,"m",7,"a",7,"l",7,"l",7,0BAH,7 DB 0BAH,7,"F",7,"2",7,"-",7,"L",7,"a",7,"r",7,"g",7 DB "e",7,2 DUP(0BAH,7),"F",7,"3",7,"-",7,"R",7 DB "t",7,"A",7,"d",7,"d",7,0BAH,7,0C7H,7 DB 8 DUP(0C4H,7),0B6H,7,0BAH,7,"L",7,"P",7,"T",7 DB "1",7," ",7,"L",7,"J",7,"2",7,2 DUP(0BAH,7) DB 17,7,0C4H,7,0D9H,7,"P",7,"r",7,"i",7,"n",7,"t",7 DB 0BAH,7,0C8H,7,"E",7,"s",7,"c",7,"=",7,"E",7 DB "x",7,"i",7,"t",7,0BCH,7 LINE_SIZE EQU 40 RET_ADD DB LINE_SIZE DUP(32),CR,LF DB LINE_SIZE DUP(32),CR,LF DB LINE_SIZE DUP(32) SKIP_LINE DB CR,LF,0,"$" LENGTH_RET = (LINE_SIZE + 2) * 3 ;----------------------------------------------------------------------- ; Laser Jet Command Sequences ;----------------------------------------------------------------------- RESET_LJ DB ESCAPE,"E",0 ; reset printer FONT DB ESCAPE,"&l1O" ; landscape DB ESCAPE,"(8U" ; Roman-8 symbol set DB ESCAPE,"(sp10h12vsb3T" ; 10-pitch 12-point ; upright med-weight Courier DB ESCAPE,"&l2H",0 ; manual feed TOP_MARGIN DB ESCAPE,"&l" ; skip lines MODELX DB "16E",0 ; 16 for LJII 30 for LJ and LJ+ LEFT_MARGIN DB ESCAPE,"&a" ; left margin ENV_SIZE DB "50L",0 ; 50 spaces - default Large ;----------------------------------------------------------------------- ; Arrow Key Jump Offsets ;----------------------------------------------------------------------- KEYTAB DB 72, 75 , 77 , 80 ; Up Left Right Down JMPTAB_TOP DW OFFSET TOP_UP,OFFSET TOP_LEFT DW OFFSET TOP_RIGHT,OFFSET TOP_DOWN JMPTAB_BOT DW OFFSET BOT_UP,OFFSET BOT_LEFT DW OFFSET BOT_RIGHT,OFFSET BOT_DOWN ;====================================================================== ; Intercept Keyboard Interrupt ;----------------------------------------------------------------------- INT09H PROC FAR ASSUME CS:CSEG,DS:NOTHING,ES:NOTHING,SS:NOTHING STI ; Turn interrupts back on PUSH AX IN AL,60H ; get scan code CMP AL,SCAN_CODE ; compare scan code JNE INT9_2 ; if not, exit to old INT09H MOV AH,2 ; shift key status INT 16H ; BIOS AND AL,0FH CMP AL,SHIFT_MASK ; compare shift status JE INT9_3 ; if yes, check if routine busy INT9_2: POP AX CLI ; flags already pushed JMP DWORD PTR CS:[OLD09H] ; look like an interrupt ;----------------------------------------------------------------------- ; More ckecks before calling main ENVELOPE routine ;----------------------------------------------------------------------- INT9_3: CMP CS:[BUSY],0 ; ENVR already active? JNE INT9_2 ; normal exit IN AL,61H ; reset keyboard MOV AH,AL OR AL,80H ; set bit 7 OUT 6AH,AL ; send to control port MOV AH,AL ; recover old value JMP SHORT $+2 OUT 6AH,AL ; send to control port CLI MOV AL,20H ; reset the OUT 20H,AL ; interrupt controller STI PUSH BX ; AX already pushed PUSH CX PUSH DX PUSH SI ; Save all registers PUSH DI PUSH DS PUSH ES PUSH BP PUSH CS ; establish addressing POP DS ASSUME DS:CSEG INC [BUSY] ; set busy flag ;----------------------------------------------------------------------- ; Get screen parameters -- part of test if interrupt OK ;----------------------------------------------------------------------- MOV AH,0FH ; get video mode INT 10H ; BIOS video CMP AL,7 ; MONO JE MODEOK CMP AL,3 ; regular 40 and 80 column modes JA INT09_X ; graphics mode - exit MODEOK: MOV [NUM_COLS],AH ; number of columns DEC AH MOV [LAST_COL],AH ; last column number MOV [VID_PAGE],BH ; video page TEST [STATUS],EGA ; check if EGA (or VGA) JZ SET_LINES ; not EGA XOR AX,AX MOV ES,AX MOV AL,BYTE PTR ES:[484H] MOV [LAST_LINE],AL SET_LINES: PUSH CS ; set segment POP ES ; for ES ASSUME ES:CSEG CALL GET_CURSOR ; get current cursor attributes MOV [CURLOC],DX ; save cursor position CALL ENVL_MAIN ; call main envelope routine MOV DX,[CURLOC] ; saved cursor location CALL SET_CURSOR ; restore cursor INT09_X: DEC [BUSY] ; Envelope finished ASSUME DS:NOTHING, ES:NOTHING POP BP POP ES POP DS POP DI ; restore all registers POP SI POP DX POP CX POP BX POP AX IRET ; return to Interrupted Routine INT09H ENDP ;====================================================================== ; Main ENVELOPE Routine ;----------------------------------------------------------------------- ENVL_MAIN PROC NEAR ASSUME CS:CSEG,DS:CSEG,ES:CSEG,SS:NOTHING ;----------------------------------------------------------------------- ; Define address on screen ; Display upper left message and cursor in upper left ;----------------------------------------------------------------------- MOV UPLEFT,0 ; initialize CALL BLOCK_WINDOW ; place window on screen XOR DX,DX ; upper left location CALL SET_CURSOR CALL GET_CHAR ; get character PUSH AX ; save character CALL BLOCK_WINDOW ; remove window from screen ;----------------------------------------------------------------------- ; set text in window for lower right corner message ;----------------------------------------------------------------------- MOV SI,OFFSET TEXT_LOWER ; text for lower message MOV DI,OFFSET MENU_BLOCK+28 ; window location CALL MOV_TEXT MOV DI,OFFSET MENU_BLOCK+50 ; window location CALL MOV_TEXT ; move 'right' message XOR DX,DX ; cursor location CALL SET_CURSOR POP AX ; recover character JMP SHORT TOP_WIN_GONE TOP_BADKE: CALL BEEP ; illegal key TOP_NEXT: CALL SET_CURSOR ; set cursor TOP_NEXT_KE: CALL GET_CHAR ; get character TOP_WIN_GONE: MOV UPLEFT,DX ; save cursor location CMP AL,CR ; carriage return JE MOV_BOT_RT ; finished with top-left moves CMP AL,ESCAPE ; Quit JNE TOP_NOT_ESC JMP ENV_EXIT ; exit ENVELOPE TOP_NOT_ESC: OR AL,AL ; extended key code JNZ TOP_NEXT_KE MOV BX,OFFSET JMPTAB_TOP+6 ; last entry in table CALL GET_JMP_OFF ; get jump offset JC TOP_BADKE ; no match JMP [DI] ; offset returned by Call TOP_UP: OR DH,DH ; row number in DH JE TOP_BADKE ; can't move higher DEC DH JMP TOP_NEXT ; get next cursor movement TOP_LEFT: OR DL,DL ; column number in DL JE TOP_BADKE ; can't move to left DEC DL JMP TOP_NEXT ; get next cursor movement TOP_RIGHT: CMP DL,LAST_COL ; column number in DL JE TOP_BADKE ; can't move to right INC DL JMP TOP_NEXT ; get next cursor movement TOP_DOWN: CMP DH,LAST_LINE ; row number in DH JE TOP_BADKE ; can't move lower INC DH JMP TOP_NEXT ; get next cursor movement ;----------------------------------------------------------------------- ; now move to bottom right corner to define address ; first -- display window and reverse video upper-left ;----------------------------------------------------------------------- MOV_BOT_RT: CALL BLOCK_WINDOW ; move window on screen MOV DX,UPLEFT ; current location CALL SET_CURSOR PUSH DX ; save cursor loc CALL REVERSE ; reverse video CALL BURY_CURSOR CALL GET_CHAR PUSH AX ; save character CALL BLOCK_WINDOW ; remove window POP AX ; recover character POP DX ; recover cursor location JMP SHORT BOT_WIN_GONE BOT_BADKE: CALL BEEP ; illegal key BOT_NEXTKE: CALL GET_CHAR ; get character BOT_WIN_GONE: MOV BOTRIGHT,DX ; save cursor location CMP AL,CR ; carriage return JE PRINT_MENU ; display print window CMP AL,ESCAPE ; Quit JNE BOT_NOT_ESC ; not Escape JMP SCREEN_RST ; restore screen BOT_NOT_ESC: OR AL,AL ; extended key code JNZ BOT_NEXTKE MOV BX,OFFSET JMPTAB_BOT+6 ; last entry in table CALL GET_JMP_OFF ; get jump offset JC BOT_BADKE ; no match MOV BX,UPLEFT ; upper left location JMP [DI] ; offset returned by Call BOT_UP: CMP DH,BH ; compare to top JE BOT_BADKE ; can't move up DEC DH ; new bottom right location PUSH DX ; save INC DH ; reset REVERSE_ROW: CALL SET_CURSOR CALL REVERSE ; reverse video at cursor DEC DL ; column number CMP DL,BL ; beyond beginning? JL BR_FINISH ; finish reversing JMP REVERSE_ROW ; next column BOT_LEFT: CMP DL,BL ; compare to left JE BOT_BADKE ; can't move left DEC DL ; new bottom right location PUSH DX ; save INC DL ; reset REVERSE_COL: CALL SET_CURSOR CALL REVERSE ; reverse video at cursor DEC DH ; row number CMP DH,BH ; at end? JGE REVERSE_COL ; next row BR_FINISH: CALL BURY_CURSOR POP DX ; recover current location JMP BOT_NEXTKE ; get next move BOT_RIGHT: CMP DL,LAST_COL ; can't move beyond last column JE BOT_BADKE INC DL ; new bottom right location PUSH DX ; save JMP REVERSE_COL ; add column BOT_DOWN: MOV AX,DX SUB AH,BH ; number rows CMP AH,5 ; max rows (is 6) JE BOT_BADKE CMP DH,LAST_LINE ; can't move beyond last row JE BOT_BADKE INC DH ; new bottom right location PUSH DX ; save JMP REVERSE_ROW ; add row ;----------------------------------------------------------------------- ; Display Print Menu ;----------------------------------------------------------------------- PRINT_MENU: CALL PRINT_WINDOW ; display print window SET_SIZE: CALL SET_HILITE ; set size and return hilites PR_NEXT: CALL GET_CHAR CMP AL,CR ; print if carriage return JE PRINT_ENV ; print envelope CMP AL,ESCAPE ; exit without printing JNE PR_NOTESC CALL PRINT_WINDOW ; remove print window JMP SCREEN_RST ; restore screen and exit PR_NOTESC: OR AL,AL ; test for extended code JZ PR_CODE PR_BADKE: CALL BEEP JMP PR_NEXT ; get another character PR_CODE: SUB AH,59 ; convert function keys to digit codes JL PR_BADKE JG PR_CODE_2 AND STATUS,NOT ENV_SIZE_BIT ; Small Envelope JMP SET_SIZE PR_CODE_2: SUB AH,2 JG PR_BADKE ; F4 or greater JE PR_CODE_3 ; F3 OR STATUS,ENV_SIZE_BIT ; Large Envelope JMP SET_SIZE PR_CODE_3: XOR STATUS,PR_RET_ADD ; toggle return address bit JMP SET_SIZE ;----------------------------------------------------------------------- ; print envelope here ;----------------------------------------------------------------------- PRINT_ENV: CALL PRINT_WINDOW ; remove print display window MOV SI,OFFSET RESET_LJ ; reset printer CALL OUT_STRING JNC PRINT_OK ;----------------------------------------------------------------------- ; printer error -- beep twice and try again ;----------------------------------------------------------------------- CALL BEEP XOR CX,CX DUMB_LOOP: LOOP DUMB_LOOP ; slight delay CALL BEEP JMP PRINT_MENU ; try again PRINT_OK: MOV SI,OFFSET FONT ; set fonts, etc. CALL OUT_STRING ;----------------------------------------------------------------------- ; set margins for location of return address ;----------------------------------------------------------------------- TEST STATUS,LJ_MODEL ; this affects top margin MOV AX,TMARG_RET_2 ; LJ Series 2 JNZ SET_TOP_RET TEST STATUS,ENV_SIZE_BIT ; affects top on LJ & LJ+ MOV AX,TMARG_RET_S ; Small on original JZ SET_TOP_RET MOV AX,TMARG_RET_L ; Large on original SET_TOP_RET: MOV WORD PTR MODELX,AX ; set top margin TEST STATUS,ENV_SIZE_BIT ; this affects left margin MOV AX,LMARG_RET_S ; small envelope JZ SET_LEFT_RET MOV AX,LMARG_RET_L ; large envelope SET_LEFT_RET: MOV WORD PTR ENV_SIZE,AX ; set left margin CALL SET_MARGINS ; send commands to printer ;----------------------------------------------------------------------- ; print the return address if requested ;----------------------------------------------------------------------- MOV CX,9 ; lines to skip if no return TEST STATUS,PR_RET_ADD ; print return address? JZ TO_ADDRESS ; no return address MOV SI,OFFSET RET_ADD ; print return address CALL OUT_STRING MOV CX,6 ; lines to skip if return addr ;----------------------------------------------------------------------- ; print 'to' address -- first set margins ;----------------------------------------------------------------------- TO_ADDRESS: CALL LINE_FEED ; skip a line LOOP TO_ADDRESS ; count in CX TEST STATUS,ENV_SIZE_BIT ; this affects left margin MOV AX,LMARG_ADD_S ; small envelope JZ SET_LEFT_ADD MOV AX,LMARG_ADD_L ; large envelope SET_LEFT_ADD: MOV WORD PTR ENV_SIZE,AX ; set left margin CALL SET_LEFT_ONLY ; send commands to printer ;----------------------------------------------------------------------- ; read address from reverse-video part of screen - send to printer ;----------------------------------------------------------------------- XOR CX,CX MOV AX,BOTRIGHT MOV DX,UPLEFT ; starting loc on screen SUB AX,DX ; rows-1 and cols-1 in AX MOV CL,AH ; rows - 1 INC AL ; columns MOV ADDR_COLS,AL ; save columns in address JCXZ LAST_ROW ; only one line NEXT_ROW: PUSH CX ; save loop counter PUSH DX ; save cursor location CALL OUT_LINE ; print line from screen CALL LINE_FEED ; send carriage return POP DX ; retrieve cursor INC DH ; next row POP CX ; retrieve counter LOOP NEXT_ROW LAST_ROW: CALL OUT_LINE ; print last line MOV SI,OFFSET RESET_LJ ; reset printer CALL OUT_STRING ; also flushes printer buffer ;----------------------------------------------------------------------- ; restore screen to normal video ;----------------------------------------------------------------------- SCREEN_RST: MOV DX,UPLEFT MOV AX,BOTRIGHT SUB AX,DX ADD AX,0101H ; rows and columns in AX XOR CX,CX MOV CL,AH ; number rows XOR AH,AH MOV SI,AX ; save columns ROW_RESTORE: PUSH CX MOV CX,SI ; number columns PUSH DX ; save cursor location COL_RESTORE: CALL SET_CURSOR CALL REVERSE ; reset video INC DL ; next column LOOP COL_RESTORE POP DX INC DH ; next row POP CX LOOP ROW_RESTORE ;----------------------------------------------------------------------- ; reset text in window for upper left corner message ;----------------------------------------------------------------------- ENV_EXIT: MOV SI,OFFSET TEXT_UPPER ; top message MOV DI,OFFSET MENU_BLOCK+28 ; window location CALL MOV_TEXT MOV DI,OFFSET MENU_BLOCK+50 ; window location CALL MOV_TEXT ; mov 'left ' message RET ENVL_MAIN ENDP ;====================================================================== ; output a string to the printer ; string address in SI, terminated by ASCII0 ;----------------------------------------------------------------------- OUT_STRING PROC NEAR LODSB ; next character OR AL,AL ; check for 0 JZ OUT_STR_X ; CY is clear CALL OUT_CHAR ; output character JC OUT_STR_X ; error return JMP OUT_STRING ; get next character OUT_STR_X: RET ; ret on ASCII0 OUT_STRING ENDP ;====================================================================== ; print line of text from screen at cursor location DX ; number to print in ADDR_COLS ;----------------------------------------------------------------------- OUT_LINE PROC NEAR PUSH CX ; save counter XOR CX,CX MOV CL,ADDR_COLS ; column counter LOOP_LINE: CALL SET_CURSOR ; cursor to location DX MOV AH,8 ; read character CALL VIDEO_INT ; into AL PUSH DX ; save location CALL OUT_CHAR ; print character POP DX ; recover location INC DL ; next column LOOP LOOP_LINE CALL BURY_CURSOR POP CX ; recover counter RET OUT_LINE ENDP ;====================================================================== ; skip line by sending CR LF combination alters AX DX SI ;----------------------------------------------------------------------- LINE_FEED PROC NEAR MOV SI,OFFSET SKIP_LINE CALL OUT_STRING ; send characters CR LF 0 RET LINE_FEED ENDP ;====================================================================== ; output character in AL to printer alters AX DX ;----------------------------------------------------------------------- OUT_CHAR PROC NEAR MOV DX,PRINT_PORT ; printer port number CMP DX,2 ; 0 to 2 are LPT1-LPT3 JG SERIAL XOR AH,AH ; print character INT 17H ; BIOS printer TEST AH,101001B ; check for printer error TEST_ERROR: JZ NO_ERROR ; normal return RET_ERROR: STC ; error return RET SERIAL: SUB DX,3 ; COM port number MOV AH,1 ; send char - DX already set INT 14H ; BIOS TEST AH,10000000B ; check for printer error JMP TEST_ERROR ; test for error OUT_CHAR ENDP ;====================================================================== ; Set top and left margins for return or to address ;----------------------------------------------------------------------- SET_MARGINS PROC NEAR MOV SI,OFFSET TOP_MARGIN ; top margin CALL OUT_STRING SET_LEFT_ONLY LABEL NEAR MOV SI,OFFSET LEFT_MARGIN ; left margin CALL OUT_STRING RET SET_MARGINS ENDP ;====================================================================== ; Calculate offset for NEAR JMP to LABEL ; extended code in AH (from GETCHAR) BX points to end of JumpTable ; Returns JUMP offset in DI No match if CY flag set ;----------------------------------------------------------------------- GET_JMP_OFF PROC NEAR MOV DI,OFFSET KEYTAB ; table of key codes MOV CX,4 ; number of codes XCHG AH,AL ; code into AL REPNZ SCASB ; look for match JNZ RET_ERROR ; no match MOV DI,BX ; last entry in table SHL CX,1 ; 2 bytes/word SUB DI,CX ; offset NO_ERROR: CLC ; normal return RET GET_JMP_OFF ENDP ;====================================================================== ; set highlites in printer menu ;----------------------------------------------------------------------- SET_HILITE PROC NEAR MOV CX,3 ; 3 lines to reset MOV DX,HILITE_LOC ; beginning location of Small PUSH DX ; save PUSH DX ; save again SET_H_LOOP: PUSH DX ; save MOV BL,07H ; normal video CALL SET_ATTRIB ; set attribute byte POP DX ; Small message INC DH ; next row LOOP SET_H_LOOP POP DX ; retrieve HILITE_LOC TEST STATUS,ENV_SIZE_BIT ; test for small JZ SET_HIL_2 ; not set = small INC DH ; Large to be hilited SET_HIL_2: MOV BL,70H ; reverse video CALL SET_ATTRIB POP DX ; retrieve HILITE_LOC ADD DH,2 ; location of 'RtAdd' TEST STATUS,PR_RET_ADD ; test for print of rt-add JZ SET_HIL_X ; no print if 0 CALL SET_ATTRIB ; color should still be in BL SET_HIL_X: CALL BURY_CURSOR ; bury cursor RET SET_HILITE ENDP ;====================================================================== ; set attributes -- start at DX (cursor) ; change 5 attributes to BL ;----------------------------------------------------------------------- SET_ATTRIB PROC NEAR PUSH CX MOV CX,5 ; attributes to set SET_ATT_LOOP: CALL SET_CURSOR MOV AH,8 ; read character CALL VIDEO_INT PUSH CX MOV AH,9 ; write character MOV CX,1 ; one character CALL VIDEO_INT ; attribute in BL INC DL ; next position POP CX LOOP SET_ATT_LOOP ; next character POP CX RET SET_ATTRIB ENDP ;====================================================================== BEEP PROC NEAR PUSH AX MOV AX,0E07H ; Beep (ASCII 7) INT 10H ; BIOS POP AX RET BEEP ENDP ;====================================================================== ; call BIOS video INT function in AH ;----------------------------------------------------------------------- VIDEO_INT PROC NEAR PUSH BX MOV BH,VID_PAGE ; page number INT 10H ; BIOS video POP BX RET VIDEO_INT ENDP ;====================================================================== ; bury cursor alters DX ;----------------------------------------------------------------------- BURY_CURSOR PROC NEAR MOV DH,[LAST_LINE] INC DH XOR DL,DL ;----------------------------------------------------------------------- ; set cursor to position in DH DL ;----------------------------------------------------------------------- SET_CURSOR LABEL NEAR PUSH AX MOV AH,2 ; set cursor VIDEO_CURSOR: CALL VIDEO_INT ; BIOS video POP AX RET ;----------------------------------------------------------------------- ; get cursor in DX ( DH DL ) ;----------------------------------------------------------------------- GET_CURSOR LABEL NEAR PUSH AX MOV AH,3 ; get cursor JMP VIDEO_CURSOR ; BIOS video BURY_CURSOR ENDP ;====================================================================== ; get character from keyboard ;----------------------------------------------------------------------- GET_CHAR PROC NEAR XOR AH,AH INT 16H RET GET_CHAR ENDP ;====================================================================== ; reverse video attribute at cursor location alters AX ;----------------------------------------------------------------------- REVERSE PROC NEAR PUSH BX PUSH CX MOV AH,8 ; read character CALL VIDEO_INT ; attribute to AH MOV CL,4 ROR AH,CL ; reverse video attribute MOV BL,AH ; need attribute in BL MOV AH,9 ; write character MOV CX,1 ; write 1 character CALL VIDEO_INT ; attribute in BL POP CX POP BX RET REVERSE ENDP ;====================================================================== ; Display Window with Instructions for Blocking out address ; SI offset in memory DX screen location ; CX chars/row AX number rows ;----------------------------------------------------------------------- BLOCK_WINDOW PROC NEAR MOV DH,2 ; row start MOV DL,[NUM_COLS] ; number columns in mode SUB DL,12 ; number columns CMP BYTE PTR [UPLEFT],27 ; check start column JLE BLOCK_WIND_2 XOR DL,DL ; start in first column BLOCK_WIND_2: MOV SI,OFFSET MENU_BLOCK ; memory LOCATION MOV AX,4 ; rows MOV CX,12 ; columns ;----------------------------------------------------------------------- ; swap window with screen - use BIOS ; call with screen loc in DX memory image at SI ; rows in AX columns in CX ; alters AX BX CX DX SI ;----------------------------------------------------------------------- WINDOW LABEL NEAR MOV [START_COL],DL ; starting column for swap LOOP_ROW: PUSH AX ; rows PUSH CX ; columns LOOP_COL: CALL SET_CURSOR MOV AH,8 ; read character and attrib CALL VIDEO_INT XCHG AX,DS:[SI] ; swap with memory INC SI INC SI ; next image location MOV BL,AH ; attribute MOV AH,9 ; write character and attrib PUSH CX MOV CX,1 ; write only one character CALL VIDEO_INT POP CX INC DL ; move cursor LOOP LOOP_COL ; next character and attribute POP CX ; number columns INC DH ; next row MOV DL,[START_COL] ; starting column POP AX ; rows to move DEC AX ; row moved JNZ LOOP_ROW ; next row CALL BURY_CURSOR RET BLOCK_WINDOW ENDP ;====================================================================== ; Display Print Command Window ; SI offset in memory DX screen location ; CX chars/row AX number rows ;----------------------------------------------------------------------- PRINT_WINDOW PROC NEAR MOV AH,2 ; row start MOV AL,[NUM_COLS] ; number columns in mode SUB AL,10 ; start column MOV DX,AX ; save ADD AX,0104H ; location for highlight MOV [HILITE_LOC],AX ; save MOV SI,OFFSET MENU_PRINT ; memory location MOV AX,8 ; rows MOV CX,10 ; columns JMP WINDOW ; swap PRINT_WINDOW ENDP ;====================================================================== ; move text in memory from DS:[SI] to ES:[DI] ; the destination is assumed to be a screen image w/attribute bytes ; ASCII 0 terminates move alters AL ; sets SI and DI to next space in sequences ;----------------------------------------------------------------------- MOV_TEXT PROC NEAR LODSB ; next character OR AL,AL JNZ MOV_TEXT_X ; ASCII 0 RET MOV_TEXT_X: STOSB ; send to display INC DI ; 2 bytes/video JMP MOV_TEXT ; get next character MOV_TEXT ENDP ;====================================================================== ; this part of code will not remain resident ;----------------------------------------------------------------------- INSTRUCT$ DB "/U - Uninstall",CR,LF DB "/Pxx - Printer Port, xx=L1-L3,C1-C4. Default" DB "=L1 (LPT1)",CR,LF DB "/Ln - LaserJet Model" DB " n=1 original & +, n=2 Series 2. Default=2",CR,LF DB "/R - Change Return Address",LF,"$" WHITE DB " ,;",9 ; space, comma, semicolon, tab FILENAME DB "ENVELOPE.COM",0 RESIDENT_SEG DW 0 ; segment of installed ENVELOPE INSTALLED$ DB CR,LF,"Port " PORT$ DB "LPT1, Model LJ" MODEL$ DB "2, Hotkey is Alt-E$" ALREADY_IN$ DB "Resident$" NOT_INST$ DB "NOT Resident$" UNINSTALL$ DB "Uninstalled$" NO_UN_INST$ DB "Can't Uninstall$" SAVE_TO_FILE$ DB "Save new ENVELOPE.COM?$" FILE_ERROR$ DB "FILE ERROR - nothing saved$" FILE_UPDATE$ DB "ENVELOPE.COM updated$" RET_UPDATE$ DB "Resident Return Address Updated$" PORT_NAMES DB "LPT1",0,"LPT2",0,"LPT3",0 DB "COM1",0,"COM2",0,"COM3",0,"COM4",0 ;---------------------------------------------------------------------- INSTALL PROC NEAR ASSUME CS:CSEG,DS:CSEG,ES:CSEG,SS:CSEG CLD ; standard UP direction MOV DX,OFFSET COPYRIGHT$ MOV AH,9 ; copyright message INT 21H ; DOS MOV DX,OFFSET INSTRUCT$ CALL MESSAGE MOV NUM_COLS,80 MOV LAST_COL,79 MOV LAST_LINE,24 MOV PRINT_PORT,0 MOV STATUS,5 ;----------------------------------------------------------------------- ; first check if ENVELOPE already installed and set flag in STATUS ;----------------------------------------------------------------------- ASSUME ES:NOTHING NOT WORD PTR [START] ; Modify MOV BX,600H ; segment to compare MOV AX,CS ; this segment FIND_RES: INC BX ; next paragraph MOV ES,BX ; ES is search segment CMP AX,BX ; current segment? JE CHECK_TAIL ; not in memory flag is 0 MOV SI,OFFSET START ; compare static part of data MOV DI,SI ; same offset in both strings MOV CX,16 ; bytes to compare REP CMPSB ; compare DS:SI to ES:DI OR CX,CX ; all matched JNZ FIND_RES ; check next paragraph OR STATUS,INSTALLED ; set bit for installed MOV RESIDENT_SEG,BX ; save installed segment MOV DX,OFFSET ALREADY_IN$ CALL MESSAGE ;----------------------------------------------------------------------- ; Now check command tail for switches ; DS points to CODE and to PSP ;----------------------------------------------------------------------- CHECK_TAIL: PUSH DS ; reset extra segment POP ES ASSUME ES:CSEG MOV SI,80H ; location of command tail LODSB ; length in AL OR AL,AL ; Check if parameters JNZ CHECK_0 ; commands to check ATTEMPT_INST: TEST STATUS,INSTALLED JNZ RLH_1 JMP OK_INSTALL ; proceed with default install RLH_1: MOV AX,4C01H ;Terminate with return code INT 21H ;----------------------------------------------------------------------- ; Decode command line using brute force ;----------------------------------------------------------------------- CHECK_0: MOV BL,AL ; character count CHECK_1: OR BL,BL ; more commands? JZ ATTEMPT_INST ; processing complete LODSB ; next character DEC BL ; keep count current MOV DI,OFFSET WHITE ; delimiters and space MOV CX,4 ; number to check REPNE SCASB JE CHECK_1 ; look for next character CHECK_2: CMP AL,"/" ; normal delimiter JNE ATTEMPT_INST ; anything else - default ;----------------------------------------------------------------------- ; check character after slash ;----------------------------------------------------------------------- OR BL,BL ; if / terminates JZ ATTEMPT_INST ; then try default install LODSB ; character after slash AND AL,01011111B ; capitalize CMP AL,"U" ; uninstall JNE CHECK_3 JMP UNINSTALL ; attempt to uninstall CHECK_3: CMP AL,"P" ; check for port input JNE CHECK_4 CALL GET_PORT JC ATTEMPT_INST ; if input errors JMP CHECK_1 ; continue with input CHECK_4: CMP AL,"L" ; check LJ Model input JNE CHECK_5 CALL GET_MODEL JC ATTEMPT_INST ; if input errors JMP CHECK_1 ; continue with input CHECK_5: CMP AL,"R" ; input new return address JNE ATTEMPT_INST ; no match CALL GET_RET_ADD ;----------------------------------------------------------------------- ; Prompt for saving new Return Address to ENVELOPE.COM ;----------------------------------------------------------------------- CHECK_SAVE: MOV DX,OFFSET SAVE_TO_FILE$ MOV AH,9 INT 21H ;;; CALL MESSAGE ;;; CALL GET_CHAR ; get response MOV AH,1 ;DOS get char fn INT 21H ; allows for redirection AND AL,01011111B ; capitalize CMP AL,"Y" JNE NO_RET_SAVE ;----------------------------------------------------------------------- ; save to file here - attempt to open file ;----------------------------------------------------------------------- NOT WORD PTR [START] MOV AH,3CH ;Create file MOV DX,OFFSET FILENAME ; name of ENVELOPE.COM XOR CX,CX ;Normal attribute INT 21H ; DOS JNC SAV_FILE_OK SAV_FILE_ERR: MOV DX,OFFSET FILE_ERROR$ JMP SHORT SAV_FILE_MSG ; display string, proceed SAV_FILE_OK: MOV BX,AX ; file handle MOV AH,40H ; write to file MOV CX,(OFFSET COM_SIZE - OFFSET CSEG - 100H) ;bytes MOV DX,100H INT 21H ; DOS JC SAV_FILE_ERR MOV AH,3EH ; close file handle INT 21H ; DOS MOV DX,OFFSET FILE_UPDATE$ SAV_FILE_MSG: CALL MESSAGE NOT WORD PTR [START] NO_RET_SAVE: TEST STATUS,INSTALLED ; is ENVELOPE installed? JZ OK_INSTALL ; install MOV SI,OFFSET RET_ADD MOV DI,SI ; same offset MOV AX,RESIDENT_SEG ; segment of installed ENVELOPE MOV ES,AX ; destination MOV CX,LENGTH_RET ; bytes to move REP MOVSB MOV DX,OFFSET RET_UPDATE$ CALL MESSAGE MOV AX,4C05H INT 21H ;----------------------------------------------------------------------- ; final preparations for installation of ENVELOPE ; set printer model and port name in PRINT_MENU ;----------------------------------------------------------------------- OK_INSTALL: PUSH CS POP ES ; reset segment ASSUME ES:CSEG MOV DI,OFFSET MENU_PRINT+116 ; location for model MOV AL," " ; original LJ or LJ+ TEST STATUS,LJ_MODEL ; check for LJ Series 2 JZ SET_MODEL MOV AL,"2" ; LJ Series II SET_MODEL: STOSB MOV MODEL$,AL ; Model in message MOV DI,OFFSET MENU_PRINT+102 ; location for port MOV SI,OFFSET PORT_NAMES ; location for names MOV AX,PRINT_PORT ; 0 through 6 LPT1 - COM4 ADD SI,AX SHL AX,1 SHL AX,1 ADD SI,AX ; offset in memory in SI PUSH SI ; save location CALL MOV_TEXT ; move text to video image POP SI ; location of port name MOV DI,OFFSET PORT$ ; location in message MOVSW MOVSW ; move 4 bytes ;----------------------------------------------------------------------- ; check for EGA (or VGA) and set byte if present ;----------------------------------------------------------------------- MOV AH,12H ; special EGA function MOV BL,10H ; return EGA information INT 10H ; BIOS video CMP BL,10H ; if BL unchanged then JE ENV_REL ; no EGA or VGA OR STATUS,EGA ; set EGA bit ;----------------------------------------------------------------------- ; Release environment block ;----------------------------------------------------------------------- ENV_REL: MOV BX,WORD PTR DS:[2CH] ; environment block MOV ES,BX ; segment ASSUME ES:NOTHING MOV AH,49H ; free memory block INT 21H ; DOS ;----------------------------------------------------------------------- ; go resident ;----------------------------------------------------------------------- MOV AX,3509H ; get interrupt vector 09h INT 21H ; DOS MOV WORD PTR OLD09H,BX ; offset old interrupt 09h MOV WORD PTR OLD09H[2],ES ; segment for above MOV DX,OFFSET INT09H ; new INT handler MOV AX,2509H ; set interrupt vector 09h INT 21H ; DOS MOV DX,OFFSET INSTALLED$ ; installation message CALL MESSAGE MOV DX,OFFSET INSTALL ; save code up to INSTALL INT 27H ; The infamous TSR interrupt ;----------------------------------------------------------------------- ; attempt to uninstall ENVELOPE ;----------------------------------------------------------------------- UNINSTALL: TEST STATUS,INSTALLED ; first see if it is resident JNZ UNINST_2 ; it is in memory MOV DX,OFFSET NOT_INST$ CALL MESSAGE MOV AX,4C02H INT 21H UNINST_2: MOV AX,3509H ; get segment of keyboard INT INT 21H ; DOS ASSUME ES:NOTHING MOV AX,ES ; current segment CMP AX,RESIDENT_SEG ; segment of ENVELOPE JE UNINST_3 ; OK to uninstall NO_UNINST: MOV DX,OFFSET NO_UN_INST$ MOV AX,4C03H INT 21H ;----------------------------------------------------------------------- ; OK to uninstall ;----------------------------------------------------------------------- UNINST_3: MOV ES,RESIDENT_SEG ; segment of installed ENVELOPE NOT WORD PTR ES:[START] ; don't confuse next install LDS DX,ES:[OLD09H] ; old INT09H interrupt vector ASSUME DS:NOTHING MOV AX,2509H ; reset vector 09H INT 21H ; DOS PUSH CS ; reset DS to code POP DS ASSUME DS:CSEG MOV AH,49H ; free memory block in ES INT 21H ; DOS JC NO_UNINST ; error return MOV DX,OFFSET UNINSTALL$ CALL MESSAGE MOV AX,4C04H INT 21H INSTALL ENDP ;----------------------------------------------------------------------- ; Read port number from command tail SI points to next character ; BL characters left CY set on return if error ;----------------------------------------------------------------------- GET_PORT PROC NEAR CALL GET_NEXT_CH ; next character from tail JZ G_ERROR_RET ; no characters left AND AL,01011111B ; capitalize CMP AL,"L" ; parallel port JNE GET_PORT_1 CALL GET_NEXT_CH ; next character from tail SUB AL,"1" ; should be number CMP AL,2 ; LPT3 JBE SET_PORT_NUM G_ERROR_RET: STC ; carry set on error RET SET_PORT_NUM: XOR AH,AH ; port number in AX MOV PRINT_PORT,AX ; save port number CLC ; carry clear on normal return RET GET_PORT_1: CMP AL,"C" ; serial port JNE G_ERROR_RET CALL GET_NEXT_CH ; next character from tail SUB AL,"1" ; should be number CMP AL,3 ; COM4 JA G_ERROR_RET ADD AL,3 ;Skew port number in AX JMP SET_PORT_NUM GET_PORT ENDP ;----------------------------------------------------------------------- ; Read LJ Model type from command tail SI points to next character ; BL characters left CY set on return if error ;----------------------------------------------------------------------- GET_MODEL PROC NEAR CALL GET_NEXT_CH ; next character from tail JZ G_ERROR_RET ; no characters left SUB AL,"1" ; should be number JB G_ERROR_RET ; illegal input JA GET_MODEL_2 AND STATUS,NOT LJ_MODEL ; clear model bit CLC RET GET_MODEL_2: CMP AL,1 JNE G_ERROR_RET ; illegal input OR STATUS,LJ_MODEL ; set model bit CLC RET GET_MODEL ENDP ;----------------------------------------------------------------------- ; enter new return address from keyboard ; if CY set on return - then return address is not altered ; first display current return address ;----------------------------------------------------------------------- CURRENT_RET$ DB "Current Address:$" ACCEPT_RET$ DB "Enter new address (Enter = no change).",CR,LF DB "3 lines, 40 characters max.$" GET_RET_ADD PROC NEAR MOV DX,OFFSET CURRENT_RET$ CALL MESSAGE MOV DX,OFFSET RET_ADD MOV AH,9 ; display string INT 21H ; DOS MOV DX,OFFSET ACCEPT_RET$ ; accept prompt CALL MESSAGE MOV DX,OFFSET ADR_BUF ;Single line buffer MOV BYTE PTR [ADR_BUF],LINE_SIZE+1 MOV AH,0AH ; buffered input INT 21H ; DOS CMP BYTE PTR ADR_BUF[1],0 ; any input? JE GET_RET_ADD_2 ; first line read MOV DI,OFFSET RET_ADD CALL MOVE_LINE ; blank line, move new, saves DI CALL GET_LINE ; get next line CALL GET_LINE ; get final line GET_RET_ADD_2: RET GET_RET_ADD ENDP ;====================================================================== ; get line from STDIN and then move to return address ;---------------------------------------------------------------------- GET_LINE PROC NEAR MOV DX,OFFSET ADR_BUF MOV AH,0AH ; buffered input INT 21H ; DOS ADD DI,LINE_SIZE+2 ; next line ;---------------------------------------------------------------------- ; blank line in return address ;---------------------------------------------------------------------- MOVE_LINE LABEL NEAR PUSH DI ; save pointer PUSH DI ; save pointer MOV CX,LINE_SIZE ; # characters MOV AL," " ; set to blanks REP STOSB POP DI ; recover address MOV SI,OFFSET ADR_BUF+2 ; last input MOV CL,BYTE PTR ADR_BUF[1] ; number characters CH=0 JCXZ MOVE_LINE_X ; no characters REP MOVSB MOVE_LINE_X: MOV DX,OFFSET CR_LF$ ; move to next line MOV AH,9 ; display string INT 21H ; DOS POP DI RET GET_LINE ENDP ;====================================================================== ; get next character from command tail (pointed to by SI) ; BL set to number left ZF set if not chacters left ;---------------------------------------------------------------------- GET_NEXT_CH PROC NEAR LODSB ; next character DEC BL ; update count OR BL,BL ; check if last character RET GET_NEXT_CH ENDP ;====================================================================== ; Write a line using the DOS print string function. ;---------------------------------------------------------------------- CR_LF$ DB CR,LF,"$" ; carriage return -- line feed MESSAGE PROC NEAR MOV AH,9 INT 21H MOV DX,OFFSET CR_LF$ MOV AH,9 INT 21H RET MESSAGE ENDP ;====================================================================== COM_SIZE = $ PC = $ ADR_BUF = PC ;ADR_BUF DB 41, 0, 41 DUP(0) CSEG ENDS END START