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Assembly Source File | 1991-10-24 | 150KB | 4,676 lines

;--------------------------------------------------------------------; ; PATCH * Michael J. Mefford ; ; ; ; Program customizer ; ;--------------------------------------------------------------------; _TEXT SEGMENT PUBLIC 'CODE' ASSUME CS:_TEXT,DS:_TEXT,ES:_TEXT,SS:_TEXT ORG 100H START: JMP MAIN ; DATA AREA ; --------- COLOR_ATTRIBS STRUC B DB 71H ;Blue on lt. gray ;Menu W DB 17H ;Lt. gray on blue ;Inactive window C DB 31H ;Blue on cyan ;Active bar I DB 1FH ;White on blue ;Active window A DB 07H ;Lt. gray on black ;Inactive bar S DB 10H ;Black on blue ;Unavailable entry T DB 01H ;Blue on black ;Unavailable bar COLOR_ATTRIBS ENDS COLOR COLOR_ATTRIBS <> COLOR_ATTR COLOR_ATTRIBS <> MONO_ATTR COLOR_ATTRIBS <70H, 07H, 70H, 0FH, 70H, 00H, 00H> BORDER_FLAG DB 0 ; =1 to disable. XMODEM_FLAG DB FALSE ; =1 to disable file size check. COPYRIGHT DB "PATCH 1.0 Copyright (c) 1991 Michael J. Mefford",CR,LF FIRST_RIGHTS DB "First Published in PC Magazine, November 12, 1991",CR,LF,LF SYNTAX LABEL BYTE DB "Syntax: PATCH [.ZIF directory] [program directory]",CR,LF,LF DB "$" TAB EQU 9 CR EQU 13 LF EQU 10 CTRL_Z EQU 26 SPACE EQU 32 BOX EQU 254 FF EQU 12 SINGLE_QUOTES EQU 44 DOUBLE_QUOTES EQU 34 SHIFT_KEYS EQU 00000011B RIGHT_SHIFT EQU 00000001B LEFT_SHIFT EQU 00000010B CTRL_KEY EQU 00000100B ALT_KEY EQU 00001000B ESC_SCAN EQU 01H Y_SCAN EQU 15H N_SCAN EQU 31H F1_SCAN EQU 3BH F2_SCAN EQU 3CH F3_SCAN EQU 3DH F4_SCAN EQU 3EH F5_SCAN EQU 3FH F6_SCAN EQU 40H F7_SCAN EQU 41H F8_SCAN EQU 42H F9_SCAN EQU 43H F10_SCAN EQU 44H KB_FLAG EQU 17H UP_SCAN EQU 48H DOWN_SCAN EQU 50H LEFT_SCAN EQU 4BH RIGHT_SCAN EQU 4DH PGUP_SCAN EQU 49H PGDN_SCAN EQU 51H BS_SCAN EQU 0EH DEL_SCAN EQU 53H HOME_SCAN EQU 47H END_SCAN EQU 4FH ENTER_SCAN EQU 1CH TAB_SCAN EQU 0FH CTRL_HOME_SCAN EQU 77H CTRL_END_SCAN EQU 75H PLUS1_SCAN EQU 0DH PLUS2_SCAN EQU 4EH MINUS1_SCAN EQU 0CH MINUS2_SCAN EQU 4AH SHIFT_F4 EQU 57H SHIFT_F5 EQU 58H SHIFT_F6 EQU 59H SHIFT_F9 EQU 5CH SHIFT_F10 EQU 5DH CTRL_F2 EQU 5FH ALT_F1 EQU 68H SPACE_SCAN EQU 39H LEFT_ARROW EQU 27 RIGHT_ARROW EQU 26 UP_ARROW EQU 24 DOWN_ARROW EQU 25 COMMA EQU "," DECIMAL_POINT EQU "." PLUS_SIGN EQU "+" MINUS_SIGN EQU "-" NOTE EQU 1046 ; C PORT_A EQU 60H TRUE EQU 1 FALSE EQU 0 FILE_CURRENT DB FALSE LISTING_TYPE EQU 0 FILE_TYPE EQU 1 CUSTOM_TYPE EQU 2 SELECT_TYPE EQU 3 STATE DB LISTING_TYPE DOS_VERSION DW ? SCREEN_COLOR DB ? BREAK DB ? DEFAULT_DRIVE DB ? CURRENT_DIR DB 66 DUP (?) ZIF_DRIVE DB ? ZIF_DIR DB 66 DUP (?) SPEC_SIZE EQU $ - ZIF_DRIVE PGM_DRIVE DB ? PGM_DIR DB 66 DUP (?) MATCHING STRUC RESERVED DB 21 DUP (?) ATTRIBUTE DB ? FILE_TIME DW ? FILE_DATE DW ? SIZE_LOW DW ? SIZE_HIGH DW ? FILE_NAME DB 13 DUP (?) MATCHING ENDS FILE_RECORD STRUC LIST_NAME DB 12 DUP (?) FILE_RECORD ENDS KILOBYTES = 1024 PARAGRAPH = 16 FILENAME_SIZE = 64 ;64K ZIF_BUFF_SIZE = 64 ;64K PGM_BUFF_SIZE = 64 ;64K BAC_BUFF_SIZE = 64 ;64K FILENAME_SEG DW ? ZIF_BUFF_SEG DW ? PGM_BUFF_SEG DW ? BAC_BUFF_SEG DW ? BUFFER_SIZES EQU (FILENAME_SIZE+ZIF_BUFF_SIZE+PGM_BUFF_SIZE+BAC_BUFF_SIZE) * (KILOBYTES/PARAGRAPH) TEMP_RECORD EQU FILENAME_SIZE * KILOBYTES - SIZE FILE_RECORD DTA DB SIZE MATCHING DUP (?) ASCIIZ_NAME DB 13 DUP (?) ;ASCIIZ name. BACKUP_NAME DB 13 DUP (?) FAIL_FLAG DB FALSE ;True if open failed. ROW DW 0 CRT_MODE EQU 49H CRT_COLS EQU 4AH CRT_ROWS EQU 84H COLUMNS DW ? CRT_WIDTH DW ? CRT_START DW ? STATUS_REG DW 3BAH VIDEO_SEG DW 0B000H ROWS DB 24 LISTING_TOP EQU 5 MENU_LINES EQU 6 CUSTOM_START EQU (SIZE FILE_RECORD + 1) * 2 COLOR_TOP EQU LISTING_TOP SELECT_START EQU CUSTOM_START + ((CAT_NUL - CAT_TEXT + 2) * 2) HOT_TOP EQU LISTING_TOP + 1 COM_TOP EQU LISTING_TOP + 2 LPT_TOP EQU LISTING_TOP + 3 TEXT_TOP EQU LISTING_TOP + 4 NUMBER_TOP EQU LISTING_TOP + 5 PICK_TOP EQU LISTING_TOP + 6 WINDOW_TOP EQU 24 / 2 LISTING_LEN DW ? LISTING_ADDR DW 0 BAR_ADDR DW 0 LAST_ADDR DW ? FILENAME DW ? ;Address of filespec to parse. ZIF_BYTES DW ? PGM_BYTES DW ? FILE_CNT DW 0 MODIFY_FLAG DB FALSE LISTING_MENU LABEL BYTE DB "Select Utility then press Enter to select custom category. Esc to Exit",0 CUSTOM_MENU LABEL BYTE DB "Select custom category then press Enter to customize. Esc to Exit",0 STAR_DOT_ZIF DB "*" ZIF_EXT DB ".ZIF",0 ZIF_LEN EQU $ - ZIF_EXT NONE_FOUND DB "No .ZIF files were found",CR,LF,LF,"$" NOT_ENOUGH DB "Not enough memory",CR,LF,LF,"$" CRLFLF DB CR,LF,LF,"$" ; CODE AREA ; --------- KBD_STATUS DB ? INT_9 PROC NEAR PUSH AX IN AL,PORT_A CMP AL,0E0H JZ INT_9_END CMP AL,0E1H JZ INT_9_END MOV CS:KBD_STATUS,AL INT_9_END: POP AX JMP DWORD PTR CS:OLD9 INT_9 ENDP ;----------------------------------------------; INT_24 PROC NEAR STI PUSHF MOV CS:FAIL_FLAG,TRUE MOV AL,3 CMP CS:DOS_VERSION,300H JAE INT_24_END XOR AL,AL INT_24_END: POPF IRET INT_24 ENDP ;----------------------------------------------; MAIN PROC NEAR CLD MOV AH,30H INT 21H XCHG AL,AH MOV DOS_VERSION,AX CALL INSTALL_9 CALL INSTALL_24 XOR BH,BH MOV AH,8 INT 10H MOV SCREEN_COLOR,AH MOV AX,3300H ;Get Ctrl-Break state. INT 21H MOV BREAK,DL XOR DL,DL MOV AX,3301H INT 21H MOV AH,19H ;Get default drive so can INT 21H ; restore after we change it. MOV DEFAULT_DRIVE,AL MOV BX,OFFSET STACK_POINTER + 15 MOV CL,4 SHR BX,CL ADD BX,BUFFER_SIZES MOV AH,4AH ;Allocate memory. INT 21H JNC SETUP_STACK MOV DX,OFFSET NOT_ENOUGH JMP ERROR_EXIT ;If not enough, exit. SETUP_STACK: MOV AX,OFFSET STACK_POINTER MOV SP,AX ;Set up stack. ADD AX,15 MOV CL,4 SHR AX,CL MOV CX,DS ADD AX,CX MOV FILENAME_SEG,AX ;And data segments. ADD AX,FILENAME_SIZE * (KILOBYTES / PARAGRAPH) MOV ZIF_BUFF_SEG,AX ADD AX,ZIF_BUFF_SIZE * (KILOBYTES / PARAGRAPH) MOV PGM_BUFF_SEG,AX ADD AX,BAC_BUFF_SIZE * (KILOBYTES / PARAGRAPH) MOV BAC_BUFF_SEG,AX MOV DX,OFFSET DTA MOV AH,1AH INT 21H CALL PARSE CALL FIND_FILES MOV DX,OFFSET NONE_FOUND CMP FILE_CNT,0 JZ ERROR_EXIT CALL VIDEO_SETUP CALL HIDE_CURSOR CALL DISP_DIR MOV SI,OFFSET LISTING_MENU CALL DISPLAY_MENU CALL DISP_LISTING CALL DISP_FILE JMP SHORT NEXT_KEY ;************* Main Loop *************; NEXT_KEY: CALL GETKEY JC GOOD_EXIT CMP AL,RIGHT_SCAN JZ ENTER1 CMP AH,CR JNZ CK_SPACE ENTER1: CALL FILE MOV STATE,LISTING_TYPE CALL DISP_LISTING CALL DISP_FILE MOV SI,OFFSET LISTING_MENU CALL DISPLAY_MENU JMP NEXT_KEY CK_SPACE: CMP AH,SPACE JBE MAIN_DISPATCH CALL SEARCH JMP NEXT_KEY MAIN_DISPATCH: MOV DI,OFFSET L_DISPATCH MOV CX,L_LEN CALL DISPATCH CALL DISP_LISTING JMP NEXT_KEY ;----------------------------------------------; ERROR_EXIT: CALL PRINT_STRING MOV AL,1 JMP SHORT EXIT GOOD_EXIT: CALL CLOSE_SCREEN XOR AL,AL ;EL=0. EXIT: PUSH AX CALL UNINSTALL_9 CALL RESTORE_DIR MOV DL,BREAK MOV AX,3301H INT 21H TERMINATE: MOV DX,OFFSET COPYRIGHT CALL PRINT_STRING POP AX MOV AH,4CH INT 21H MAIN ENDP ;************** ; SUBROUTINES * ;************** BACKUP_FLAG DB ? ;=TRUE if backup made. FILE: MOV BACKUP_FLAG,FALSE CMP FILE_CURRENT,TRUE JZ DO_FILE2 JMP FILE_END DO_FILE2: CALL SET_PGM CALL MAKE_FILENAME DO_FILE3: MOV DX,OFFSET ASCIIZ_NAME XOR CX,CX MOV AH,4EH INT 21H JNC READ_FILE CALL NEW_PGM JNC DO_FILE3 JMP FILE_END READ_FILE: CALL READ_PGM JNC CK_SIZE JMP FILE_ERR CK_SIZE: MOV AX,DTA.SIZE_LOW MOV CX,DTA.SIZE_HIGH MOV BX,FILE_SIZE[0] CMP AX,BX JNZ CK_MODEM CMP CX,FILE_SIZE[2] JZ DO_FILE CK_MODEM: CMP XMODEM_FLAG,TRUE JZ DO_FILE ADD BX,7FH ;128-1 AND BX,NOT 7FH ;Round up. CMP AX,BX JNZ WRONG_SIZE MOV SI,FILE_SIZE PUSH DS MOV DS,PGM_BUFF_SEG CMP BYTE PTR [SI],0 POP DS JNZ WRONG_SIZE XMODEM: CALL DO_XMODEM JC FILE_END DO_FILE: MOV STATE,FILE_TYPE CALL DISP_LISTING NEXT_FILE: MOV SI,OFFSET CUSTOM_MENU CALL DISPLAY_MENU CALL DISP_FILE NEXT_FILE2: CALL GETKEY JC FILE_END CMP AL,LEFT_SCAN JZ FILE_END MOV BX,CUSTOM_ADDR CMP AH,CR JZ DO_MENU2 CMP AL,RIGHT_SCAN JZ DO_MENU2 CMP AL,UP_SCAN JNZ CK_DOWN CMP BX,OFFSET CATEGORY + SIZE CAT JZ NEXT_FILE2 SUB CUSTOM_ADDR,SIZE CAT JMP NEXT_FILE CK_DOWN: CMP AL,DOWN_SCAN JNZ NEXT_FILE2 ADD BX,SIZE CAT CMP BX,OFFSET CAT_END JAE NEXT_FILE2 MOV CUSTOM_ADDR,BX JMP NEXT_FILE DO_MENU2: CMP [BX.CAT_STATUS],INACTIVE JZ NEXT_FILE2 MOV STATE,CUSTOM_TYPE PUSH BX CALL DISP_FILE POP BX CALL [BX.CAT_MENU] JMP DO_FILE WRONG_SIZE: CALL DO_WRONG JMP FILE_END FILE_ERR: CALL BEEP FILE_END: CALL SET_ZIF RET ;----------------------------------------------; CANT_FIND LABEL BYTE DB "╔═════════════════════════════════════════╗",0 PATH_EDIT_LEN EQU $ - CANT_FIND - 5 DB "║ Can't find ",0 CANT_FIND2 LABEL BYTE DB " Enter new path ║",0 DB "║ ║",0 DB "║ Esc to Cancel ║",0 DB "╚═════════════════════════════════════════╝",0 NEW_PGM: CALL BEEP CALL RESTORE_DIR CALL CALC_WINDOW ADD BP,SELECT_START MOV DI,BP MOV SI,OFFSET CANT_FIND MOV BH,COLOR.W CALL WRITE_STRING ADD BP,CRT_WIDTH MOV DI,BP CALL WRITE_STRING CALL WRITE_NAME MOV SI,OFFSET CANT_FIND2 CALL WRITE_STRING ADD BP,CRT_WIDTH MOV DI,BP MOV ADDR_SCREEN,DI CALL WRITE_STRING ADD BP,CRT_WIDTH MOV DI,BP CALL WRITE_STRING ADD BP,CRT_WIDTH MOV DI,BP CALL WRITE_STRING MOV CX,PATH_EDIT_LEN - 2 MOV SI,OFFSET PGM_DRIVE MOV DI,OFFSET DTA LODSB ADD AL,"A" STOSB MOV AL,":" STOSB NEXT_PATH: LODSB OR AL,AL JZ NEW_PATH2 STOSB LOOP NEXT_PATH NEW_PATH2: JCXZ NEW_PATH3 MOV AL,SPACE REP STOSB NEW_PATH3: XOR AL,AL STOSB MOV LINE_START,OFFSET DTA MOV LINE_END,OFFSET DTA + PATH_EDIT_LEN MOV AX,ADDR_SCREEN ADD AX,2 * 2 MOV SCREEN_START,AX MOV LEGAL_CHARS,OFFSET ALL_CHARS CALL EDITOR JC NEW_PGM_END MOV SI,OFFSET DTA MOV DI,OFFSET PGM_DRIVE CALL PARSE_IT CALL DISP_DIR CLC NEW_PGM_END: RET ;----------------------------------------------; SIZE_MSG LABEL BYTE DB "╔════════════════════════════════════════════════════════════════╗",0 DB "║ ",0 SIZE_MSG2 LABEL BYTE DB " size does not match the SIZE in the .ZIF file. ║",0 XMODEM_MSG LABEL BYTE DB "║ ║",0 DB "║ However, ",0 XMODEM_MSG2 LABEL BYTE DB " appears to have been downloaded via the ║",0 DB "║ XMODEM protocol which rounds a file up to a 128 byte multiple. ║",0 DB "║ ║",0 DB "║ If you have backed-up ",0 XMODEM_MSG3 LABEL BYTE DB " it's Okay to continue. ║",0 DB "║ Continue Y/N? ║",0 DB "╚════════════════════════════════════════════════════════════════╝",0 WRONG_MSG LABEL BYTE DB "║ It's suggest that you download from ZiffNet the latest version ║",0 DB "║ of ",0 WRONG_MSG2 LABEL BYTE DB " Press any key ║",0 DB "╚════════════════════════════════════════════════════════════════╝",0 DO_XMODEM: CALL BEEP CALL DISP_SIZE MOV SI,OFFSET XMODEM_MSG CALL WRITE_STRING ADD BP,CRT_WIDTH MOV DI,BP CALL WRITE_STRING CALL WRITE_NAME MOV SI,OFFSET XMODEM_MSG2 CALL WRITE_STRING ADD BP,CRT_WIDTH MOV DI,BP CALL WRITE_STRING ADD BP,CRT_WIDTH MOV DI,BP CALL WRITE_STRING ADD BP,CRT_WIDTH MOV DI,BP CALL WRITE_STRING CALL WRITE_NAME MOV SI,OFFSET XMODEM_MSG3 CALL WRITE_STRING ADD BP,CRT_WIDTH MOV DI,BP CALL WRITE_STRING ADD BP,CRT_WIDTH MOV DI,BP CALL WRITE_STRING CALL GETKEY CMP AL,Y_SCAN CLC JZ XMODEM_END STC XMODEM_END: RET ;----------------------------------------------; DO_WRONG: CALL BEEP CALL DISP_SIZE MOV SI,OFFSET WRONG_MSG CALL WRITE_STRING ADD BP,CRT_WIDTH MOV DI,BP CALL WRITE_STRING CALL WRITE_NAME MOV SI,OFFSET WRONG_MSG2 CALL WRITE_STRING ADD BP,CRT_WIDTH MOV DI,BP CALL WRITE_STRING CALL GETKEY RET ;----------------------------------------------; DISP_SIZE: CALL CALC_WINDOW ADD BP,CUSTOM_START MOV DI,BP MOV SI,OFFSET SIZE_MSG MOV BH,COLOR.W CALL WRITE_STRING ADD BP,CRT_WIDTH MOV DI,BP CALL WRITE_STRING CALL WRITE_NAME MOV SI,OFFSET SIZE_MSG2 CALL WRITE_STRING ADD BP,CRT_WIDTH MOV DI,BP RET ;----------------------------------------------; WRITE_NAME: MOV CX,12 MOV SI,OFFSET ASCIIZ_NAME CALL WRITE_LINE CALL PAD_LINE RET ;----------------------------------------------; CALC_WINDOW: MOV AX,WINDOW_TOP CALL CALC_ADDR MOV BP,DI RET ;----------------------------------------------; SEARCH: PUSH DS CMP AH,"a" JB DO_SEARCH CMP AH,"z" JA DO_SEARCH AND AH,5FH DO_SEARCH: MOV SI,BAR_ADDR MOV DS,FILENAME_SEG CMP [SI],AH JZ NEXT_SEARCH XOR SI,SI JMP SHORT NEXT_SEARCH2 NEXT_SEARCH: ADD SI,SIZE FILE_RECORD NEXT_SEARCH2: CMP BYTE PTR[SI],-1 JZ NO_MATCH CMP [SI],AH JNZ NEXT_SEARCH POP DS MOV BAR_ADDR,SI MOV AX,LISTING_LEN SHR AX,1 MOV BX,SIZE FILE_RECORD MUL BX SUB SI,AX JNC STORE_MATCH XOR SI,SI STORE_MATCH: MOV LISTING_ADDR,SI MOV FILE_CURRENT,FALSE JMP SHORT SEARCH_END NO_MATCH: POP DS CALL BEEP SEARCH_END: CALL DISP_LISTING CALL DISP_FILE RET ;----------------------------------------------; L_DISPATCH DB UP_SCAN, DOWN_SCAN, PGUP_SCAN, PGDN_SCAN DB HOME_SCAN, END_SCAN L_LEN EQU $ - L_DISPATCH DW LUP, LDOWN, LPGUP, LPGDN DW LHOME, LEND ;----------------------------------------------; ; INPUT: AX=Listing page; BP=BAR_ADDR; DX=LISTING_ADDR; CX=LAST_ADDR. ; OUTPUT: LISTING_FLAG=TRUE if listing changed. LUP: SUB BP,SIZE FILE_RECORD ;Move bar up a line. JL LPAGE_END ;If < 0, ignore. CMP BP,DX ;If bar below top, OK. JAE LPAGE_UPDATE SUB DX,SIZE FILE_RECORD ;Else, move listing up a line. JMP SHORT LPAGE_UPDATE LDOWN: ADD BP,SIZE FILE_RECORD ;Move bar down a line. CMP BP,CX ;If > last line, then ignore. JA LPAGE_END ADD AX,DX ;Listing top + page length = CMP BP,AX ; listing bottom; If bar below JB LPAGE_UPDATE ; listing bottom, OK. ADD DX,SIZE FILE_RECORD ;Else move listing down a line. JMP SHORT LPAGE_UPDATE LPGUP: SUB BP,AX ;Move bar up a page. SUB DX,AX ;Move listing up a page. JC LHOME ;If listing < top, then home. JMP SHORT LPAGE_UPDATE ;Else, OK. LPGDN: ADD DX,AX ;Move listing down a page. CMP DX,CX ;If <= last line, do bar. JBE DO_BAR SUB DX,AX ;Else, back to where we were MOV BP,CX ; and move bar to last line JMP SHORT LPAGE_UPDATE ; and update. DO_BAR: ADD BP,AX ;Move bar down a page. CMP BP,CX ;If bar <= last line, OK. JBE LPAGE_UPDATE MOV BP,CX ;Else, move bar to last line. JMP SHORT LPAGE_UPDATE LHOME: XOR BP,BP ;Move bar to top. XOR DX,DX ;Move listing to top. JMP SHORT LPAGE_UPDATE LEND: MOV BP,CX ;Move bar to last line. ADD CX,SIZE FILE_RECORD ;Last line + 1 - page length = SUB CX,AX ; top of last page. CMP DX,CX ;If less than a full page, JG LPAGE_UPDATE ; then already at last page. MOV DX,CX ;Else, move listing to last page. LPAGE_UPDATE: MOV BAR_ADDR,BP ;Store the new bar MOV LISTING_ADDR,DX ; and listing line start. MOV FILE_CURRENT,FALSE MOV FAIL_FLAG,FALSE LPAGE_END: RET ;----------------------------------------------; FIND_FILES: CALL SET_ZIF XOR BP,BP ;ES:BP -> filename storage. MOV DX,OFFSET STAR_DOT_ZIF XOR CX,CX MOV AH,4EH ;Find first. INT 21H JC FILES_DONE ;If no, assumed right. PUSH ES MOV ES,FILENAME_SEG XOR DI,DI MOV AX,SPACE SHL 8 + SPACE MOV CX,FILENAME_SIZE / 2 * KILOBYTES REP STOSW ;Initialize with spaces. POP ES FIND_NEXT: MOV DX,OFFSET DTA.FILE_NAME CALL READ_ZIF JC FILES_DONE CALL STORE_NAME ;Store a filename. CMP BP,TEMP_RECORD - SIZE FILE_RECORD JA FILES_DONE MOV AH,4FH ;Find Next Matching. INT 21H JNC FIND_NEXT ;If successful store filename. FILES_DONE: PUSH ES MOV ES,FILENAME_SEG MOV AX,-1 ;Else, mark the end with -1. MOV DI,BP STOSW POP ES SUB DI,SIZE FILE_RECORD + 2 JNC STORE_LAST XOR DI,DI STORE_LAST: MOV LAST_ADDR,DI CALL SORT ;Sort 'em. FILES_END: RET ;----------------------------------------------; ; INPUT: DX-> filename ; OUTPUT: CF = 1 if failed. READ_ZIF: MOV AX,3D00H INT 21H JC OPEN_END CMP FAIL_FLAG,TRUE STC JZ OPEN_FAIL MOV BX,AX CALL READZ JNC OPEN_END OPEN_FAIL: CALL BEEP MOV FAIL_FLAG,FALSE STC OPEN_END: RET ;----------------------------------------------; ; INPUT: BX = filehandle. ; OUTPUT: CF=1 if read failed. READZ: PUSH DS MOV DS,ZIF_BUFF_SEG XOR DX,DX MOV CX,ZIF_BUFF_SIZE * KILOBYTES - 1 MOV AH,3FH INT 21H MOV CS:ZIF_BYTES,AX MOV SI,AX MOV BYTE PTR [SI],CTRL_Z JC CLOSE CMP CS:FAIL_FLAG,TRUE STC JZ CLOSE CAPITALIZE: XOR SI,SI MOV CX,AX JCXZ CLOSE1 XOR AH,AH ;Quotes flag. NEXT_CAP: LODSB CMP AL,CTRL_Z JZ CAP_END CMP AL,AH JZ CLOSE_QUOTES CMP AH,DOUBLE_QUOTES JZ NEXT_CAP CMP AL,DOUBLE_QUOTES JZ OPEN_QUOTES CMP AL,"a" JB NEXT_CAP CMP AL,"z" JA NEXT_CAP AND BYTE PTR [SI - 1],5FH JMP NEXT_CAP OPEN_QUOTES: MOV AH,AL JMP NEXT_CAP CLOSE_QUOTES: XOR AH,AH JMP NEXT_CAP CAP_END: CLOSE1: CLC CLOSE: PUSHF MOV AH,3EH INT 21H POPF READ_END: POP DS MOV FAIL_FLAG,FALSE RET ;----------------------------------------------; ; INPUT: DX-> filename ; OUTPUT: CF = 1 if failed. READ_PGM: MOV AX,3D00H INT 21H JC OPEN_END2 CMP FAIL_FLAG,TRUE STC JZ OPEN_FAIL2 MOV BX,AX CALL READP JNC OPEN_END OPEN_FAIL2: CALL BEEP MOV FAIL_FLAG,FALSE STC OPEN_END2: RET ;----------------------------------------------; ; INPUT: BX = filehandle. ; OUTPUT: CF=1 if read failed. READP: PUSH DS MOV DS,PGM_BUFF_SEG XOR DX,DX MOV CX,PGM_BUFF_SIZE * KILOBYTES - 1 MOV AH,3FH INT 21H JC CLOSE2 CMP CS:FAIL_FLAG,TRUE STC JZ CLOSE2 MOV CS:PGM_BYTES,AX CLC CLOSE2: PUSHF MOV AH,3EH INT 21H POPF READP_END: POP DS MOV FAIL_FLAG,FALSE RET ;----------------------------------------------; ;INPUT: BP->filename storage. ;OUTPUT: BP->next storage. FILE_STR DB "[FILE]" FILE_STR_LEN EQU $ - FILE_STR FILENAME_STR DB "FILENAME" FILENAME_STR_LEN EQU $ - FILENAME_STR STORE_NAME: PUSH DS MOV DS,ZIF_BUFF_SEG XOR BX,BX NEXT_FILE_STR: MOV DI,OFFSET FILE_STR MOV SI,BX CMP BYTE PTR [SI],CTRL_Z JZ NAME_END1 INC BX MOV CX,FILE_STR_LEN REPZ CMPSB JNZ NEXT_FILE_STR ADD BX,FILE_STR_LEN - 1 MOV SI,BX CALL PARSE_LINES MOV BX,SI NEXT_FILE_STR2:MOV DI,OFFSET FILENAME_STR MOV SI,BX CMP BYTE PTR [SI],CTRL_Z JZ NAME_END1 CMP BYTE PTR [SI],"[" JZ NAME_END1 INC BX MOV CX,FILENAME_STR_LEN REPZ CMPSB JNZ NEXT_FILE_STR2 CALL PARSE_LINE ;SI-> name start. JC NAME_END1 PUSH ES ;Preserve extra segment. MOV ES,CS:FILENAME_SEG MOV DI,BP MOV CX,SIZE LIST_NAME ;Store 12 bytes of filename. JMP SHORT NEXT_STORE EXTENSION: ADD DI,CX MOV CX,3 SUB DI,CX NEXT_STORE: LODSB ;Get a byte. CMP AL,SPACE JBE END_STORE ;If yes, finish with blanks. CMP AL,"." ;Is it the period? JZ EXTENSION STOSB ;Store byte. LOOP NEXT_STORE ;Get next byte. END_STORE: ADD BP,SIZE LIST_NAME INC CS:FILE_CNT POP ES NAME_END1: POP DS NAME_END: RET ;Done here. ;----------------------------------------------; DISP_FILE: CMP FILE_CURRENT,TRUE JZ DISP_FILE2 CALL MAKE_ZIF_NAME MOV DX,OFFSET ASCIIZ_NAME CALL READ_ZIF JC NO_FILE MOV FILE_CURRENT,TRUE CALL PARSE_FILE DISP_FILE2: CALL DISP_CUSTOM JMP SHORT DISP_FILE_END NO_FILE: CALL CLEAR_FILE CALL BEEP DISP_FILE_END: RET ;----------------------------------------------; ACTIVE EQU 0 INACTIVE EQU -1 CAT STRUC CAT_STATUS DB INACTIVE CAT_LEN DB ? CAT_TEXT DB " " CAT_NUL DB 0 CAT_MENU DW ? CAT_PARSE DW ? CAT ENDS CATEGORY CAT <,5, "FILE]",, DUMMY_RET, FILE_PARSE> CAT <,6, "COLOR]",, COLOR_MENU, COLOR_PARSE> CAT <,7, "HOTKEY]",, HOTKEY_MENU, HOTKEY_PARSE> CAT <,6, "MODEM]",, MODEM_MENU, MODEM_PARSE> CAT <,8, "PRINTER]",, PRINTER_MENU, PRINTER_PARSE> CAT <,5, "TEXT]",, TEXT_MENU, TEXT_PARSE> CAT <,7, "NUMBER]",, NUMBER_MENU, NUMBER_PARSE> CAT <,10,"PICK LIST]",, PICK_MENU, PICK_PARSE> CAT_END EQU $ CATEGORY_LEN EQU (CAT_END - CATEGORY ) / SIZE CAT CUSTOM_ADDR DW ? ;Index into custom menu. VARS LABEL BYTE FILE_SIZE DW ?,? COLOR_MAX EQU 7 COLOR_MENUS DW COLOR_MAX DUP (?) TEXT_MAX EQU 7 TEXT_MENUS DW TEXT_MAX DUP (?) NUM_MAX EQU 7 NUMBER_MENUS DW NUM_MAX DUP (?) PICK_MAX EQU 6 PICK_MENUS DW PICK_MAX DUP (?) ENTRY_MENUS DW PICK_MAX DUP (PICK_MAX DUP (?)) SHIFT_ADDR DW ? SHIFT_TEXT_ADDR DW ? SCAN_ADDR DW ? SCAN_TEXT_ADDR DW ? VARS_LEN EQU $ - VARS COLOR_ADDRS DW COLOR_MAX DUP (?) COLOR_VALUES DW COLOR_MAX DUP (?) TEXT_ADDRS DW TEXT_MAX DUP (?) TEXT_LENGTH DW TEXT_MAX DUP (?) STRING_MAX EQU 27 TEXT_EDIT DB TEXT_MAX DUP (STRING_MAX DUP (?)) NUMBER_ADDRS DW NUM_MAX DUP (?) NUMBER_TYPE DW NUM_MAX DUP (?) RANGE_LOW DW NUM_MAX DUP (?) RANGE_HIGH DW NUM_MAX DUP (?) INTEGER_MAX EQU 7 NUMBER_EDIT DB NUM_MAX DUP (INTEGER_MAX DUP (?)) NUMBER_RANGE DB INTEGER_MAX + 1 DUP (?) PICK_ADDRS DW PICK_MAX DUP (?) PICK_TYPES DW PICK_MAX DUP (?) ENTRY_VALUES DW PICK_MAX DUP (PICK_MAX DUP (?)) ;--------------; INIT_VARS: MOV CUSTOM_ADDR,OFFSET CATEGORY + SIZE CAT MOV BP,CATEGORY_LEN MOV SI,OFFSET CATEGORY MOV AX,INACTIVE NEXT_INACTIVE: MOV [SI],AL ADD SI,SIZE CAT DEC BP JNZ NEXT_INACTIVE MOV CX,VARS_LEN MOV DI,OFFSET VARS REP STOSB RET ;----------------------------------------------; PARSE_FILE: PUSH DS CALL INIT_VARS MOV DS,ZIF_BUFF_SEG XOR SI,SI NEXT_BRACKET: LODSB CMP AL,CTRL_Z JZ PARSE_FILE_END CMP AL,"[" JNZ NEXT_BRACKET CMP BYTE PTR [SI],CTRL_Z JZ PARSE_FILE_END MOV BP,CATEGORY_LEN MOV DX,SI MOV BX,OFFSET CATEGORY NEXT_CAT: MOV SI,DX MOV DI,BX ADD DI,CAT_TEXT MOV CL,CS:[BX.CAT_LEN] XOR CH,CH REP CMPSB JZ FOUND_CAT ADD BX,SIZE CAT DEC BP JNZ NEXT_CAT INC DX MOV SI,DX JMP NEXT_BRACKET FOUND_CAT: CALL PARSE_LINES JC NEXT_BRACKET PUSH BX CALL CS:[BX.CAT_PARSE] POP BX JC NEXT_BRACKET MOV CS:[BX.CAT_STATUS],ACTIVE JMP NEXT_BRACKET PARSE_FILE_END:POP DS RET ;----------------------------------------------; ;INPUT: DS:SI->ZIF_BUFF_SEG:OFFSET; BX->CATEGORY:OFFSET ;OUTPUT: DS:SI->end of category; CF=1 if no valid parameters found. SIZE_STR DB "SIZE" SIZE_STR_LEN EQU $ - SIZE_STR ;--------------; FILE_PARSE: MOV BP,SIZE_STR_LEN MOV BX,OFFSET SIZE_STR CALL PARSE_KEY JC FILE_PARSE_END CALL GET_NUMBER JC FILE_PARSE_END MOV CS:FILE_SIZE[0],AX MOV CS:FILE_SIZE[2],CX FILE_PARSE_END:RET ;--------------; ENTRY_INDEX DW ? PICK_ADDR DW ? PICK_PARSE: XOR BX,BX MOV CS:ENTRY_INDEX,0 NEXT_PICK: MOV BP,SI INC BP CALL PARSE_STRING JC PICK_END CALL PARSE_LINE JC PICK_END CALL GET_NUMBER JC PICK_END SUB AX,100H JC PICK_END MOV CS:PICK_ADDR,AX CALL PARSE_LINE JC PICK_END PUSH BX PUSH BP MOV BP,SIZE_STR_LEN MOV BX,OFFSET SIZE_STR CALL PARSE_KEY POP BP POP BX JC PICK_END CALL PARSE_LINE JC PICK_END LODSB CMP AL,"B" JZ STORE_PICK CMP AL,"W" STC JNZ PICK_END STORE_PICK: MOV CS:PICK_TYPES[BX],AX CALL PARSE_END2 CALL PARSE_LINES JC PICK_END CALL PARSE_ENTRY JC PICK_END MOV AX,CS:PICK_ADDR MOV CS:PICK_ADDRS[BX],AX MOV CS:PICK_MENUS[BX],BP ADD CS:ENTRY_INDEX,PICK_MAX * 2 INC BX INC BX CMP BX,PICK_MAX * 2 JAE PICK_END CALL PARSE_LINES JNC NEXT_PICK CLC PICK_END: RET ;--------------; ENTRY_STR DB "ENTRY" ENTRY_STR_LEN EQU $ - ENTRY_STR VALUE_STR DB "VALUE" VALUE_STR_LEN EQU $ - VALUE_STR ENTRY_ADDR DW ? ENTRY_MAX DW ? PARSE_ENTRY: PUSH BX PUSH BP MOV BX,CS:ENTRY_INDEX MOV AX,BX ADD AX,PICK_MAX * 2 MOV CS:ENTRY_MAX,AX NEXT_ENTRY: PUSH BX MOV BP,ENTRY_STR_LEN MOV BX,OFFSET ENTRY_STR CALL PARSE_KEY POP BX JC PARSE_E_END CALL PARSE_LINE JC PARSE_E_END MOV BP,SI INC BP CALL PARSE_STRING JC PARSE_E_END CALL PARSE_LINE JC PARSE_E_END PUSH BX PUSH BP MOV BP,VALUE_STR_LEN MOV BX,OFFSET VALUE_STR CALL PARSE_KEY POP BP POP BX JC PARSE_E_END CALL PARSE_LINE JC PARSE_E_END CALL GET_NUMBER JC PARSE_E_END MOV CS:ENTRY_VALUES[BX],AX MOV CS:ENTRY_MENUS[BX],BP INC BX INC BX CMP BX,CS:ENTRY_MAX JAE PARSE_E_END CALL PARSE_LINES JC PARSE_E_DONE CMP AL,DOUBLE_QUOTES JNZ NEXT_ENTRY PARSE_E_DONE: CLC PARSE_E_END: POP BP POP BX RET ;--------------; COLOR_PARSE: XOR BX,BX ;Index. NEXT_COLOR: MOV BP,SI ;Save string start. INC BP ;Bump past quotes. CALL PARSE_STRING JC COLOR_END CALL PARSE_LINE JC COLOR_END CALL GET_NUMBER JC COLOR_END SUB AX,100H JC COLOR_END MOV CS:COLOR_MENUS[BX],BP ;String start. MOV CS:COLOR_ADDRS[BX],AX ;Prog address. INC BX INC BX CMP BX,COLOR_MAX * 2 JAE COLOR_END CALL PARSE_LINES JNC NEXT_COLOR CLC COLOR_END: RET ;--------------; SHIFT_STR DB "SHIFT" SHIFT_LEN EQU $ - SHIFT_STR TEXT_STR DB "TEXT" TEXT_LEN EQU $ - TEXT_STR SCAN_STR DB "SCAN" SCAN_LEN EQU $ - SCAN_STR GOOD_PARA DB FALSE ;TRUE if valid parameters HOTKEY_PARSE: MOV CS:GOOD_PARA,FALSE PUSH SI NEXT_SHIFT: MOV BP,SHIFT_LEN MOV BX,OFFSET SHIFT_STR CALL PARSE_KEY JNC GOT_SHIFT CALL PARSE_LINES JNC NEXT_SHIFT JMP SHORT CK_SCAN GOT_SHIFT: CALL PARSE_LINE JC CK_SCAN CALL GET_NUMBER JC CK_SCAN SUB AX,100H JC CK_SCAN MOV CS:SHIFT_ADDR,AX MOV CS:GOOD_PARA,TRUE CALL PARSE_LINE JC CK_SCAN MOV BP,TEXT_LEN MOV BX,OFFSET TEXT_STR CALL PARSE_KEY JC CK_SCAN CALL PARSE_LINE JC CK_SCAN CALL GET_NUMBER JC CK_SCAN SUB AX,100H JC CK_SCAN MOV CS:SHIFT_TEXT_ADDR,AX CK_SCAN: POP SI NEXT_SCAN: MOV BP,SCAN_LEN MOV BX,OFFSET SCAN_STR CALL PARSE_KEY JNC GOT_SCAN CALL PARSE_LINES JNC NEXT_SCAN JMP SHORT HOT_END1 GOT_SCAN: CALL PARSE_LINE JC HOT_END1 CALL GET_NUMBER JC HOT_END1 SUB AX,100H JC HOT_END1 MOV CS:SCAN_ADDR,AX CALL PARSE_LINE JC HOT_END1 MOV BP,TEXT_LEN MOV BX,OFFSET TEXT_STR CALL PARSE_KEY JC HOT_END1 CALL PARSE_LINE JC HOT_END1 CALL GET_NUMBER JC HOT_END1 SUB AX,100H JC HOT_END1 MOV CS:SCAN_TEXT_ADDR,AX HOT_END1: CMP CS:GOOD_PARA,TRUE CLC JZ HOT_END STC HOT_END: RET ;--------------; COM_STR DB "COM" COM_LEN EQU $ - COM_STR COM_ADDR DW ? MODEM_PARSE: MOV BP,COM_LEN MOV BX,OFFSET COM_STR CALL PARSE_KEY JC MODEM_END CALL PARSE_LINE JC MODEM_END CALL GET_NUMBER JC MODEM_END SUB AX,100H JC MODEM_END MOV CS:COM_ADDR,AX MODEM_END: RET ;--------------; LPT_STR DB "LPT" LPT_LEN EQU $ - LPT_STR LPT_ADDR DW ? PRINTER_PARSE: MOV BP,LPT_LEN MOV BX,OFFSET LPT_STR CALL PARSE_KEY JC LPT_END CALL PARSE_LINE JC LPT_END CALL GET_NUMBER JC LPT_END SUB AX,100H JC LPT_END MOV CS:LPT_ADDR,AX LPT_END: RET RET ;--------------; LENGTH_STR DB "LENGTH" LENGTH_STR_LEN EQU $ - LENGTH_STR TEXT_PARSE: XOR BX,BX ;Index. NEXT_TEXT: MOV BP,SI ;Save string start. INC BP ;Bump past quotes. CALL PARSE_STRING JC TEXT_END CALL PARSE_LINE JC TEXT_END CALL GET_NUMBER JC TEXT_END SUB AX,100H JC TEXT_END MOV CS:TEXT_ADDRS[BX],AX ;Prog address. CALL PARSE_LINE JC TEXT_END PUSH BX PUSH BP MOV BP,LENGTH_STR_LEN MOV BX,OFFSET LENGTH_STR CALL PARSE_KEY POP BP POP BX JC TEXT_END CALL PARSE_LINE JC TEXT_END CALL GET_NUMBER JC TEXT_END MOV CS:TEXT_LENGTH[BX],AX MOV CS:TEXT_MENUS[BX],BP ;String start. INC BX INC BX CMP BX,TEXT_MAX * 2 JAE TEXT_END CALL PARSE_LINES JNC NEXT_TEXT CLC TEXT_END: RET ;--------------; RANGE_STR DB "RANGE" RANGE_STR_LEN EQU $ - RANGE_STR NUMBER_PARSE: XOR BX,BX ;Index. NEXT_NUM: MOV BP,SI ;Save string start. INC BP ;Bump past quotes. CALL PARSE_STRING JC LILLY_N_END CALL PARSE_LINE JC LILLY_N_END CALL GET_NUMBER JC LILLY_N_END SUB AX,100H JC LILLY_N_END MOV CS:NUMBER_ADDRS[BX],AX CALL PARSE_LINE JC LILLY_N_END PUSH BX PUSH BP MOV BP,SIZE_STR_LEN MOV BX,OFFSET SIZE_STR CALL PARSE_KEY POP BP POP BX JC LILLY_N_END CALL PARSE_LINE JC LILLY_N_END LODSB CMP AL,"B" JZ STORE_NUMBER CMP AL,"W" JZ STORE_NUMBER LILLY_N_END: STC JMP SHORT N_END STORE_NUMBER: MOV CS:NUMBER_TYPE[BX],AX MOV CS:NUMBER_MENUS[BX],BP ;String start. MOV CS:RANGE_LOW[BX],0 MOV CX,-1 CMP AL,"W" JZ STORE_RANGE MOV CX,255 STORE_RANGE: MOV CS:RANGE_HIGH[BX],CX MOV CX,4 NEXT_SIZE2: LODSB CMP AL,SPACE JBE DO_RANGE LOOP NEXT_SIZE2 DO_RANGE: DEC SI CALL PARSE_LINE JC NEXT_NUM2 PUSH BX PUSH BP MOV BP,RANGE_STR_LEN MOV BX,OFFSET RANGE_STR CALL PARSE_KEY POP BP POP BX JC NEXT_NUM2 CALL PARSE_LINE JC NEXT_NUM2 CMP BYTE PTR [SI],"-" JNZ GET_LOW INC SI JMP SHORT GET_HIGH GET_LOW: CALL PARSE_LINE JC NEXT_NUM2 CALL GET_NUMBER JC NEXT_NUM2 MOV CS:RANGE_LOW[BX],AX GET_HIGH: CALL PARSE_LINE JC NEXT_NUM2 CALL GET_NUMBER JC NEXT_NUM2 MOV CS:RANGE_HIGH[BX],AX NEXT_NUM2: INC BX INC BX CMP BX,NUM_MAX * 2 JAE N_END CALL PARSE_END2 CALL PARSE_LINES JC N_END2 JMP NEXT_NUM N_END2: CLC N_END: RET ;----------------------------------------------; ; INPUT: DS:SI-> String OUTPUT: CF=1 if no string. PARSE_STRING: MOV AH,DOUBLE_QUOTES CMP BYTE PTR [SI],AH JNZ NO_STRING INC SI NEXT_STRING: LODSB CMP AL,CTRL_Z JZ NO_STRING1 CMP AL,CR JZ NO_STRING CMP AL,AH JNZ NEXT_STRING MOV BYTE PTR [SI-1],0 ;ASCIIZ string CLC JMP SHORT STRING_END NO_STRING1: DEC SI NO_STRING: STC STRING_END: RET ;----------------------------------------------; ; INPUT: ES:BX->string to match; BP=string len; DS:SI-> FILEBUFF. ; OUTPUT: CF=1 if no match; CF=0 if match; SI-> next string. PARSE_KEY: MOV AL,[SI] CMP AL,CTRL_Z JZ NO_KEY CMP AL,"[" JZ NO_KEY MOV CX,BP MOV DI,BX MOV AX,SI REP CMPSB JZ FOUND_KEY MOV SI,AX PUSH BX CALL PARSE_END2 CALL PARSE_LINES POP BX JMP PARSE_KEY FOUND_KEY: CALL PARSE_LINE RET NO_KEY: STC RET ;----------------------------------------------; PARSE_END2: LODSB CMP AL,LF JZ PARSE_END_END CMP AL,CTRL_Z JNZ PARSE_END2 DEC SI PARSE_END_END: RET ;--------------; PICK_M1 LABEL BYTE DB "Select pick description then press Enter to pick. Esc to Exit",0 PICK_M DB "Pick descriptions",0 DB "~~~~~~~~~~~~~~~~~",0 PICK_INDEX DW ? PICK_MENU: CMP [PICK_MENUS],INACTIVE JZ P_MENU_END1 MOV PICK_INDEX,0 NEXT_P_MENU: MOV STATE,CUSTOM_TYPE MOV SI,OFFSET PICK_M1 CALL DISPLAY_MENU NEXT_P_MENU2: CALL DISP_PICK CALL GETKEY JC P_MENU_END CMP AL,LEFT_SCAN JZ P_MENU_END CMP AH,CR JZ DO_PICK CMP AL,RIGHT_SCAN JZ DO_PICK CK_P_UP: MOV BX,PICK_INDEX CMP AL,UP_SCAN JNZ CK_P_DN SUB BX,2 JC NEXT_P_MENU2 JMP SHORT PICK_UPDATE CK_P_DN: CMP AL,DOWN_SCAN JNZ NEXT_P_MENU2 INC BX INC BX CMP BX,PICK_MAX * 2 JAE NEXT_P_MENU2 CMP PICK_MENUS[BX],INACTIVE JZ NEXT_P_MENU2 PICK_UPDATE: MOV PICK_INDEX,BX JMP NEXT_P_MENU2 DO_PICK: CALL PICK_SELECT JMP NEXT_P_MENU P_MENU_END1: CALL BEEP P_MENU_END: RET ;----------------------------------------------; DISP_PICK: MOV AX,PICK_TOP CALL CALC_ADDR ADD DI,SELECT_START MOV BH,COLOR.W PUSH DI MOV SI,OFFSET PICK_M CALL WRITE_STRING POP DI ADD DI,CRT_WIDTH PUSH DI CALL WRITE_STRING POP DI ;--------------; XOR BP,BP NEXT_PICK_DES: MOV SI,PICK_MENUS[BP] CMP SI,INACTIVE JZ PICK_DES_END ADD DI,CRT_WIDTH PUSH DI MOV CX,STRING_MAX MOV BH,COLOR.W CMP PICK_INDEX,BP JNZ WRITE_DESC4 MOV BH,COLOR.C CMP STATE,CUSTOM_TYPE JZ WRITE_DESC4 MOV BH,COLOR.A WRITE_DESC4: PUSH DS MOV DS,ZIF_BUFF_SEG CALL WRITE_LINE CALL PAD_LINE POP DS POP DI INC BP INC BP CMP BP,PICK_MAX * 2 JB NEXT_PICK_DES PICK_DES_END: RET ;----------------------------------------------; PICK_M2 LABEL BYTE DB "Pick entry then press Enter to select. Esc to Cancel",0 ENTRY_SELECT_HOME DW ? ENTRY_SELECT_INDEX DW ? PICK_SELECT: MOV STATE,SELECT_TYPE MOV SI,OFFSET PICK_M2 CALL DISPLAY_MENU CALL DISP_PICK MOV AX,PICK_MAX MOV BX,PICK_INDEX ;BX=Pick index. MUL BX MOV BP,AX ;BP=Entry index. MOV ENTRY_SELECT_HOME,BP MOV SI,PICK_ADDRS[BX] PUSH DS MOV DS,PGM_BUFF_SEG MOV AX,[SI] ;Current value. POP DS NEXT_P_DEF: CMP CS:ENTRY_MENUS[BP],INACTIVE JZ FOUND_DEF1 CMP BYTE PTR PICK_TYPES[BX],"W" JZ CK_WORD CMP BYTE PTR CS:ENTRY_VALUES[BP],AL JZ FOUND_DEF JMP SHORT LOOP_DEF CK_WORD: CMP CS:ENTRY_VALUES[BP],AX JZ FOUND_DEF LOOP_DEF: INC SI INC SI INC BP INC BP JMP NEXT_P_DEF FOUND_DEF1: DEC BP DEC BP FOUND_DEF: MOV ENTRY_SELECT_INDEX,BP NEXT_P_SEL: CALL DISP_SELECT CALL GETKEY JC PICK_S_END CMP AL,LEFT_SCAN JZ PICK_S_END CMP AH,CR JZ DO_S_PICK CK_S_UP: MOV BX,ENTRY_SELECT_INDEX CMP AL,UP_SCAN JNZ CK_S_DN SUB BX,2 JC NEXT_P_SEL CMP BX,ENTRY_SELECT_HOME JB NEXT_P_SEL JMP SHORT ENTRY_UPDATE CK_S_DN: CMP AL,DOWN_SCAN JNZ NEXT_P_SEL INC BX INC BX CMP ENTRY_MENUS[BX],INACTIVE JZ NEXT_P_SEL ENTRY_UPDATE: MOV ENTRY_SELECT_INDEX,BX JMP NEXT_P_SEL DO_S_PICK: MOV MODIFY_FLAG,TRUE PICK_S_END: CALL CK_MODIFIED JC P_S_END CALL COPY_PICK CALL SAVE P_S_END: CALL CLEAR_PICK RET ;----------------------; DISP_SELECT: MOV AX,PICK_INDEX SHR AX,1 ADD AX,PICK_TOP + 2 CALL CALC_ADDR ADD DI,SELECT_START + (STRING_MAX * 2) MOV BP,ENTRY_SELECT_HOME NEXT_SEL_DES: MOV SI,ENTRY_MENUS[BP] CMP SI,INACTIVE JZ SELECT_DES_END PUSH DI MOV CX,STRING_MAX MOV BH,COLOR.W CMP ENTRY_SELECT_INDEX,BP JNZ WRITE_DESC6 MOV BH,COLOR.C WRITE_DESC6: PUSH DS MOV DS,ZIF_BUFF_SEG CALL WRITE_LINE CALL PAD_LINE POP DS POP DI ADD DI,CRT_WIDTH INC BP INC BP JMP NEXT_SEL_DES SELECT_DES_END:RET ;----------------------------------------------; COPY_PICK: PUSH ES MOV ES,PGM_BUFF_SEG MOV SI,PICK_INDEX MOV DI,PICK_ADDRS[SI] CMP BYTE PTR PICK_TYPES[SI],"W" MOV SI,ENTRY_SELECT_INDEX MOV AX,ENTRY_VALUES[SI] JZ COPY_WORD2 STOSB JMP SHORT COPY_P_END COPY_WORD2: STOSW COPY_P_END: POP ES RET ;----------------------------------------------; CLEAR_PICK: MOV AX,PICK_INDEX SHR AX,1 ADD AX,PICK_TOP + 2 CALL CALC_ADDR ADD DI,SELECT_START + (STRING_MAX * 2) PUSH ES MOV DX,STATUS_REG ;Retrieve status register. MOV ES,VIDEO_SEG ;Point to screen segment. MOV SI,COLOR_INDEX MOV BH,COLOR.W MOV AL,SPACE MOV BP,PICK_MAX NEXT_CLEAR5: PUSH DI MOV CX,STRING_MAX NEXT_CLEAR6: CALL WRITE_CHAR LOOP NEXT_CLEAR6 POP DI ADD DI,CRT_WIDTH DEC BP JNZ NEXT_CLEAR5 POP ES RET ;----------------------------------------------; COLOR_M1 LABEL BYTE DB "Select color description then press Enter to change color. Esc to Exit",0 COLOR_M DB "Color Descriptions",0 DB "~~~~~ ~~~~~~~~~~~~",0 COLOR_INDEX DW 0 COLOR_MENU: CMP [COLOR_MENUS],INACTIVE JZ C_MENU_END1 CALL COLOR_DEFAULT MOV COLOR_INDEX,0 NEXT_C_MENU: MOV STATE,CUSTOM_TYPE MOV SI,OFFSET COLOR_M1 CALL DISPLAY_MENU NEXT_C_MENU2: CALL DISP_COLOR CALL GETKEY JC C_MENU_END CMP AL,LEFT_SCAN JZ C_MENU_END CMP AH,CR JZ DO_COLOR CMP AL,RIGHT_SCAN JZ DO_COLOR CK_C_UP: MOV BX,COLOR_INDEX CMP AL,UP_SCAN JNZ CK_C_DN SUB BX,2 JC NEXT_C_MENU2 JMP SHORT COLOR_UPDATE CK_C_DN: CMP AL,DOWN_SCAN JNZ NEXT_C_MENU2 INC BX INC BX CMP BX,COLOR_MAX * 2 JAE NEXT_C_MENU2 CMP COLOR_MENUS[BX],INACTIVE JZ NEXT_C_MENU2 COLOR_UPDATE: MOV COLOR_INDEX,BX JMP NEXT_C_MENU2 DO_COLOR: CALL COLOR_SELECT JMP NEXT_C_MENU C_MENU_END1: CALL BEEP C_MENU_END: CALL CK_MODIFIED JC C_M_END CALL COPY_COLORS CALL SAVE C_M_END: RET ;--------------; COLOR_DEFAULT: PUSH ES MOV ES,PGM_BUFF_SEG XOR BX,BX NEXT_C_DEFAULT:CMP [COLOR_MENUS.BX],INACTIVE JZ C_DEFAULT_END MOV SI,[COLOR_ADDRS.BX] MOV AX,ES:[SI] MOV [COLOR_VALUES.BX],AX INC BX INC BX CMP BX,COLOR_MAX * 2 JB NEXT_C_DEFAULT C_DEFAULT_END: POP ES RET ;--------------; DISP_COLOR: PUSH DS MOV AX,COLOR_TOP CALL CALC_ADDR ADD DI,SELECT_START MOV BH,COLOR.W PUSH DI MOV SI,OFFSET COLOR_M CALL WRITE_STRING POP DI ADD DI,CRT_WIDTH PUSH DI CALL WRITE_STRING POP DI ;--------------; XOR BP,BP MOV DS,ZIF_BUFF_SEG NEXT_COLOR_DES:MOV SI,CS:COLOR_MENUS[BP] CMP SI,INACTIVE JZ COLOR_DES_END ADD DI,CS:CRT_WIDTH PUSH DI MOV BX,CS:COLOR_VALUES[BP] XCHG BH,BL MOV AL,SPACE CALL WRITE_SCREEN MOV AL,"[" CALL WRITE_SCREEN MOV AX,BP SHR AX,1 ADD AL,"A" CALL WRITE_SCREEN MOV AL,"]" CALL WRITE_SCREEN MOV AL,SPACE CALL WRITE_SCREEN MOV BH,CS:COLOR.W CALL WRITE_SCREEN CMP CS:COLOR_INDEX,BP JNZ WRITE_DESC MOV BH,CS:COLOR.C CMP CS:STATE,CUSTOM_TYPE JZ WRITE_DESC MOV BH,CS:COLOR.A WRITE_DESC: CALL WRITE_STRING POP DI INC BP INC BP CMP BP,COLOR_MAX * 2 JB NEXT_COLOR_DES COLOR_DES_END: POP DS RET ;----------------------------------------------; COLOR_M2 LABEL BYTE DB "Select color then press Enter. Esc to Cancel",0 COLOR_SELECT: MOV SI,COLOR_INDEX PUSH COLOR_VALUES[SI] MOV STATE,SELECT_TYPE MOV SI,OFFSET COLOR_M2 CALL DISPLAY_MENU NEXT_C_BARS: CALL DISP_COLOR MOV AX,COLOR_TOP + COLOR_MAX + 2 CALL CALC_ADDR ADD DI,SELECT_START PUSH ES MOV DX,STATUS_REG ;Retrieve status register. MOV ES,VIDEO_SEG ;Point to screen segment. MOV SI,COLOR_INDEX XOR BH,BH N_BACKGROUND: PUSH DI N_FORGROUND: MOV AL,SPACE CALL WRITE_CHAR MOV AL,"*" CMP BH,BYTE PTR COLOR_VALUES[SI] JNZ DO_A_COLOR MOV AX,COLOR_INDEX SHR AL,1 ADD AL,"A" DO_A_COLOR: CALL WRITE_CHAR MOV AL,SPACE CALL WRITE_CHAR INC BH TEST BH,1111B JNZ N_FORGROUND POP DI ADD DI,CRT_WIDTH TEST BH,10000000B JZ N_BACKGROUND POP ES NEXT_C_KEY: CALL GETKEY JC COLOR_S_END1 CMP AH,CR JZ SELECT_ENTER MOV CX,COLOR_VALUES[SI] MOV BH,CL MOV BL,CL AND BH,11110000B ;Background AND BL,00001111B ;Foreground CMP AL,UP_SCAN JNZ CK_COLOR_DN SUB BH,00010000B JC NEXT_C_KEY JMP SHORT UPDATE_C CK_COLOR_DN: CMP AL,DOWN_SCAN JNZ CK_COLOR_RT ADD BH,00010000B TEST BH,10000000B JNZ NEXT_C_KEY JMP SHORT UPDATE_C CK_COLOR_RT: CMP AL,RIGHT_SCAN JNZ CK_COLOR_LT ADD BL,1 TEST BL,00010000B JNZ NEXT_C_KEY JMP SHORT UPDATE_C CK_COLOR_LT: CMP AL,LEFT_SCAN JNZ NEXT_C_KEY SUB BL,1 JC NEXT_C_KEY UPDATE_C: OR BL,BH MOV CL,BL MOV COLOR_VALUES[SI],CX JMP NEXT_C_BARS SELECT_ENTER: POP AX MOV MODIFY_FLAG,TRUE JMP SHORT COLOR_S_END COLOR_S_END1: MOV SI,COLOR_INDEX POP COLOR_VALUES[SI] COLOR_S_END: CALL CLEAR_BARS RET ;----------------------------------------------; CLEAR_BARS: MOV AX,COLOR_TOP + COLOR_MAX + 2 CALL CALC_ADDR ADD DI,SELECT_START PUSH ES MOV DX,STATUS_REG ;Retrieve status register. MOV ES,VIDEO_SEG ;Point to screen segment. MOV SI,COLOR_INDEX MOV BH,COLOR.W MOV AL,SPACE MOV BP,8 NEXT_CLEAR3: PUSH DI MOV CX,16 * 3 NEXT_CLEAR4: CALL WRITE_CHAR LOOP NEXT_CLEAR4 POP DI ADD DI,CRT_WIDTH DEC BP JNZ NEXT_CLEAR3 POP ES RET ;----------------------------------------------; COPY_COLORS: PUSH ES MOV ES,PGM_BUFF_SEG XOR BX,BX NEXT_C_COPY: CMP COLOR_MENUS[BX],INACTIVE JZ COPY_C_END MOV DI,COLOR_ADDRS[BX] MOV AX,COLOR_VALUES[BX] STOSB INC BX INC BX JMP NEXT_C_COPY COPY_C_END: POP ES RET ;----------------------------------------------; SCAN_CODES LABEL BYTE DB "1",2,"2",3,"3",4,"4",5,"5",6,"6",7,"7",8,"8",9,"9",0AH,"0",0BH,"-",0CH DB "=",0DH,"Q",10H,"W",11H,"E",12H,"R",13H,"T",14H,"Y",15H,"U",16H,"I",17H DB "O",18H,"P",19H,"[",1AH,"]",1BH,"A",1EH,"S",1FH,"D",20H,"F",21H,"G",22H DB "H",23H,"J",24H,"K",25H,"L",26H,";",27H,39,28H,96,29H,"\",2BH,"Z",2CH DB "X",2DH,"C",2EH,"V",2FH,"B",30H,"N",31H,"M",32H,",",33H,".",34H,"/",35H SCAN_COUNT EQU ($ - SCAN_CODES) / 2 ;--------------; HOT_MENU LABEL BYTE DB "Current hotkey is ",0 HOT_MENU2 LABEL BYTE DB "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~",0 HOT_MENU3 LABEL BYTE DB "Select HotKey and then press Enter. Esc to cancel",0 HOT_MENU4 LABEL BYTE DB "Select Shift key and then press Enter. Esc to cancel",0 HOT_MENU5 LABEL BYTE DB "Press Alpha or Numeric key. Esc to cancel",0 SHIFT_TEXT DB "CtRs", "CtLs", "AlRs", "AlLs", "RsLs", "CtAl" CTRL DB "Ctrl ",0 ALT DB "Alt ",0 RT_SHIFT DB "Right Shift ",0 LT_SHIFT DB "Left Shift ",0 SHIFT_COMBOS LABEL BYTE DB CTRL_KEY + RIGHT_SHIFT, CTRL_KEY + LEFT_SHIFT, ALT_KEY + RIGHT_SHIFT DB ALT_KEY + LEFT_SHIFT, RIGHT_SHIFT + LEFT_SHIFT, CTRL_KEY + ALT_KEY COMBOS_LEN EQU $ - SHIFT_COMBOS SHIFT_KEY DB ? SHIFT_INDEX DW ? HOTKEY LABEL WORD SCAN_TEXT DB ? SCAN_KEY DB ? HOTKEY_MENU: MOV SI,OFFSET HOT_MENU3 CMP SCAN_ADDR,INACTIVE JZ DISP_HOT_M MOV SI,OFFSET HOT_MENU4 DISP_HOT_M: CALL DISPLAY_MENU MOV AX,HOT_TOP CALL CALC_ADDR ADD DI,SELECT_START MOV BP,DI MOV BH,COLOR.W MOV SI,OFFSET HOT_MENU CALL WRITE_STRING MOV SI,SHIFT_ADDR PUSH DS MOV DS,PGM_BUFF_SEG MOV AL,[SI] ;Shift key MOV SI,CS:SCAN_ADDR MOV AH,[SI] ;AlphaNumeric key POP DS MOV SHIFT_KEY,AL CMP SI,INACTIVE JNZ SHIFT_ALPHA SHIFT_ONLY: CALL DISP_COMBOS ADD BP,CRT_WIDTH MOV DI,BP MOV SI,OFFSET HOT_MENU2 CALL WRITE_STRING ADD BP,CRT_WIDTH MOV AL,SHIFT_KEY MOV DI,OFFSET SHIFT_COMBOS MOV CX,COMBOS_LEN REPNZ SCASB NEG CX ADD CX,COMBOS_LEN - 1 MOV SHIFT_INDEX,CX ;--------------; NEXT_SH_ONLY: MOV DI,BP XOR SI,SI NEXT_SH_ONLY2: MOV AL,SHIFT_COMBOS[SI] MOV BH,COLOR.C CMP AL,SHIFT_KEY JZ DISP_SHIFT MOV BH,COLOR.W DISP_SHIFT: PUSH SI PUSH DI CALL DISP_COMBOS POP DI POP SI ADD DI,CRT_WIDTH INC SI CMP SI,COMBOS_LEN JB NEXT_SH_ONLY2 CALL SHIFT_HOT JNC NEXT_SH_ONLY JMP HOT_DONE1 ;--------------; SHIFT_ALPHA: CALL DISP_COMBOS XCHG AH,AL CALL SCAN_LOOKUP CALL WRITE_SCREEN ADD BP,CRT_WIDTH MOV DI,BP MOV SI,OFFSET HOT_MENU2 CALL WRITE_STRING ADD BP,CRT_WIDTH NEXT_S_ALPHA: MOV DI,BP MOV SI,OFFSET CTRL MOV BH,COLOR.C CMP SHIFT_KEY,CTRL_KEY JZ DISP_CTRL MOV BH,COLOR.W DISP_CTRL: CALL WRITE_STRING MOV DI,BP ADD DI,CRT_WIDTH MOV SI,OFFSET ALT MOV BH,COLOR.C CMP SHIFT_KEY,ALT_KEY JZ DISP_ALT MOV BH,COLOR.W DISP_ALT: CALL WRITE_STRING NEXT_S_ALPHA2: CALL GETKEY JC HOT_DONE1 CMP AL,LEFT_SCAN JZ HOT_DONE1 CMP AH,CR JZ HOT_ALPHA CMP AL,UP_SCAN JNZ CK_ALPHA_DN MOV SHIFT_KEY,CTRL_KEY JMP NEXT_S_ALPHA CK_ALPHA_DN: CMP AL,DOWN_SCAN JNZ NEXT_S_ALPHA2 MOV SHIFT_KEY,ALT_KEY JMP NEXT_S_ALPHA ;--------------; HOT_ALPHA: MOV SI,OFFSET HOT_MENU5 CALL DISPLAY_MENU MOV DH,HOT_TOP + 4 MOV DL,SELECT_START SHR 1 CALL SET_CURSOR ADD BP,CRT_WIDTH ADD BP,CRT_WIDTH NEXT_ALPHA: CALL GETKEY JC HOT_DONE1 CMP AL,LEFT_SCAN JZ HOT_DONE1 CALL SCAN_LOOKUP JCXZ NEXT_ALPHA MOV HOTKEY,AX MOV DI,BP MOV BH,COLOR.C CALL WRITE_SCREEN MOV MODIFY_FLAG,1 HOT_DONE1: CALL HIDE_CURSOR CALL CK_MODIFIED JC HOT_DONE CALL COPY_HOT CALL SAVE HOT_DONE: RET ;--------------; SCAN_LOOKUP: PUSH ES PUSH DI MOV CX,CS MOV ES,CX MOV DI,OFFSET SCAN_CODES + 1 MOV CX,SCAN_COUNT ;38 possible Alt key combos. NEXT_SCAN2: SCASB ;Do we have a match? JZ GOT_HOT INC DI ;If no, bump pointer to next byte. LOOP NEXT_SCAN2 GOT_HOT: MOV AH,AL MOV AL,[DI - 2] POP DI POP ES RET ;----------------------------------------------; ;INPUT: AL=shift state; DI->screen; BH=color DISP_COMBOS: PUSH AX MOV CX,AX MOV SI,OFFSET CTRL TEST AL,CTRL_KEY JZ CK_ALT CALL WRITE_STRING CK_ALT: MOV SI,OFFSET ALT TEST CL,ALT_KEY JZ CK_RT_SHIFT CALL WRITE_STRING CK_RT_SHIFT: MOV SI,OFFSET RT_SHIFT TEST CL,RIGHT_SHIFT JZ CK_LF_SHIFT CALL WRITE_STRING CK_LF_SHIFT: MOV SI,OFFSET LT_SHIFT TEST CL,LEFT_SHIFT JZ SHIFT_DONE CALL WRITE_STRING SHIFT_DONE: POP AX RET ;----------------------------------------------; SHIFT_HOT: CALL GETKEY JC SHIFT_HOT_END CMP AH,CR JZ SHIFT_ENTER MOV BL,SHIFT_KEY MOV SI,SHIFT_INDEX CMP AL,UP_SCAN JNZ CK_SHIFT_DN SUB SI,1 JC SHIFT_HOT JMP SHORT SHIFT_UPDATE CK_SHIFT_DN: CMP AL,DOWN_SCAN JNZ SHIFT_HOT ADD SI,1 CMP SI,COMBOS_LEN JZ SHIFT_HOT SHIFT_UPDATE: MOV AL,SHIFT_COMBOS[SI] MOV SHIFT_KEY,AL MOV SHIFT_INDEX,SI CLC JMP SHORT SHIFT_HOT_END SHIFT_ENTER: MOV MODIFY_FLAG,1 STC SHIFT_HOT_END: RET ;----------------------------------------------; COPY_HOT: PUSH ES MOV AL,SHIFT_KEY MOV DI,OFFSET SHIFT_COMBOS MOV CX,COMBOS_LEN REPNZ SCASB NEG CX ADD CX,COMBOS_LEN - 1 SHL CX,1 SHL CX,1 ADD CX,OFFSET SHIFT_TEXT MOV BP,CX MOV ES,PGM_BUFF_SEG MOV DI,SHIFT_ADDR STOSB MOV DI,SHIFT_TEXT_ADDR CMP DI,INACTIVE JZ COPY_SCAN MOV SI,BP CMP SCAN_ADDR,INACTIVE JZ COPY_S_TEXT MOV SI,OFFSET CTRL CMP AL,CTRL_KEY JZ COPY_S_TEXT MOV SI,OFFSET ALT COPY_S_TEXT: MOV CX,4 REP MOVSB COPY_SCAN: MOV DI,SCAN_ADDR CMP DI,INACTIVE JZ COPY_H_END MOV AL,SCAN_KEY STOSB MOV DI,SCAN_TEXT_ADDR CMP DI,INACTIVE JZ COPY_H_END MOV AL,SCAN_TEXT STOSB COPY_H_END: POP ES RET ;--------------; COM_MENU LABEL BYTE DB "Enter 1, 2 or 3 for COM port. Esc to cancel",0 COM_MENU2 LABEL BYTE DB "COM port: ",0 COM_MENU3 LABEL BYTE DB " COM address: ",0 COM_MENU4 LABEL BYTE DB "Enter desired COM hexadecimal port address from your modem manual. Esc to cancel",0 COM_PORT DW ? PORT_SCREEN DW ? ;Screen address to write port # ADDR_SCREEN DW ? ;Screen address to write port addr. COM_EDIT DB 4 DUP (SPACE) COM_EDIT_LEN EQU $ - COM_EDIT DB 0 MODEM_MENU: MOV SI,OFFSET COM_MENU CALL DISPLAY_MENU MOV SI,COM_ADDR PUSH DS MOV DS,PGM_BUFF_SEG MOV CX,[SI] POP DS MOV COM_PORT,CX MOV AX,COM_TOP CALL CALC_ADDR ADD DI,SELECT_START MOV BH,COLOR.W MOV SI,OFFSET COM_MENU2 CALL WRITE_STRING MOV PORT_SCREEN,DI MOV AL,"1" CMP CX,3F8H JZ DISP_PORT INC AL CMP CX,2F8H JZ DISP_PORT INC AL DISP_PORT: MOV BH,COLOR.C CALL WRITE_SCREEN MOV BH,COLOR.W MOV SI,OFFSET COM_MENU3 CALL WRITE_STRING MOV ADDR_SCREEN,DI MOV BP,CX MOV BH,COLOR.C CALL HEX_ASCII MOV DH,COM_TOP MOV DL,SELECT_START SHR 1 +10 CALL SET_CURSOR NEXT_MODEM: CALL GETKEY JC M_END1 CMP AH,CR JZ M_END1 CMP AL,LEFT_SCAN JZ M_END1 CMP AH,"1" JB NEXT_MODEM CMP AH,"3" JA NEXT_MODEM MOV AL,AH MOV CL,AL MOV DI,PORT_SCREEN MOV BH,COLOR.C CALL WRITE_SCREEN MOV AX,3F8H CMP CL,"1" JZ GOT_ADDR MOV AX,2F8H CMP CL,"2" JZ GOT_ADDR MOV SI,OFFSET COM_MENU4 CALL DISPLAY_MENU MOV AX,ADDR_SCREEN MOV SCREEN_START,AX MOV LINE_START,OFFSET COM_EDIT MOV LINE_END,OFFSET COM_EDIT + COM_EDIT_LEN MOV BH,COLOR.C MOV LEGAL_CHARS,OFFSET NUMBER_CHARS CALL EDITOR JC M_END1 CALL CK_HEX MOV SI,OFFSET COM_EDIT CALL PARSE_LINE CALL GET_NUMBER JC MODEM_ERR GOT_ADDR: MOV COM_PORT,AX MOV BP,AX MOV DI,ADDR_SCREEN MOV BH,COLOR.C CALL HEX_ASCII MOV MODIFY_FLAG,TRUE M_END1: CALL HIDE_CURSOR CALL CK_MODIFIED JC M_END PUSH ES MOV ES,PGM_BUFF_SEG MOV DI,COM_ADDR MOV AX,COM_PORT STOSW POP ES CALL SAVE M_END: RET MODEM_ERR: MOV SI,OFFSET NUMBER_ERR CALL BACKUP_ERR2 JMP M_END ;--------------; CK_HEX: MOV SI,OFFSET COM_EDIT MOV CX,COM_EDIT_LEN NEXT_CK_HEX: LODSB CMP AL,SPACE JBE FOUND_HEX LOOP NEXT_CK_HEX DEC SI MOV DI,SI MOV AH,[DI] JMP SHORT FOUND_HEX2 FOUND_HEX: DEC SI CMP SI,OFFSET COM_EDIT JBE CK_HEX_END MOV DI,SI MOV AH,[DI-1] FOUND_HEX2: AND AH,5FH MOV AL,"H" CMP AH,AL JZ CK_HEX_END STOSB CK_HEX_END: RET ;----------------------- ;INPUT: BP=number; BH=color. HEX_ASCII: MOV CH,SPACE MOV AX,BP MOV AX,BP XCHG AH,AL AND AL,0FH CALL DISP_HEX MOV AX,BP MOV CL,4 SHR AL,CL CALL DISP_HEX MOV AX,BP AND AL,0FH CALL DISP_HEX MOV AL,"H" CALL WRITE_SCREEN RET ;--------------; DISP_HEX: ADD AL,90H DAA ADC AL,40H DAA CMP AL,"0" JZ ADJUST_HEX MOV CH,"0" JMP SHORT PRINT_HEX ADJUST_HEX: MOV AL,CH PRINT_HEX: CALL WRITE_SCREEN RET ;--------------; LPT_MENU LABEL BYTE DB " printer addresses found. Select printer 1" LPT_LENGTH EQU $ - LPT_MENU + 1 DB " Esc to cancel",0 PRINTER DB "LPT: ",0 PRINTER_LEN EQU $ - PRINTER PRINTER_CNT DB ? PRINTER_MENU: CALL COUNT_PRINTERS CALL MENU_OFFSET MOV BH,COLOR.B PUSH DI MOV AL,PRINTER_CNT CALL WRITE_SCREEN MOV SI,OFFSET LPT_MENU CALL WRITE_STRING POP DI CMP PRINTER_CNT,"1" JBE GO_PRINTER ADD DI,LPT_LENGTH * 2 MOV AL,"-" CALL WRITE_SCREEN MOV AL,PRINTER_CNT CALL WRITE_SCREEN GO_PRINTER: MOV AX,LPT_TOP CALL CALC_ADDR ADD DI,SELECT_START MOV SI,OFFSET PRINTER MOV BH,COLOR.W CALL WRITE_STRING MOV CX,DI MOV SI,LPT_ADDR PUSH DS MOV DS,PGM_BUFF_SEG MOV AL,[SI] POP DS ADD AL,"1" MOV BH,COLOR.C CALL WRITE_SCREEN MOV DH,LPT_TOP MOV DL,SELECT_START SHR 1 + PRINTER_LEN - 1 CALL SET_CURSOR NEXT_PRINTER: CALL GETKEY JC P_END1 XCHG AH,AL CMP AL,CR JZ P_END1 CMP AH,LEFT_SCAN JZ P_END1 CMP AL,"1" JB NEXT_PRINTER CMP AL,PRINTER_CNT JA NEXT_PRINTER GOT_PRINTER: MOV MODIFY_FLAG,1 MOV DI,CX MOV BP,AX CALL WRITE_SCREEN P_END1: CALL HIDE_CURSOR CALL CK_MODIFIED JC P_END MOV AX,BP SUB AL,"1" PUSH ES MOV ES,PGM_BUFF_SEG MOV DI,LPT_ADDR STOSB POP ES CALL SAVE P_END: RET ;--------------; PRINTER_BASE EQU 8 COUNT_PRINTERS:PUSH DS MOV AX,40H MOV DS,AX MOV AL,"0" MOV SI,PRINTER_BASE MOV AH,3 NEXT_PRINTERS: CMP WORD PTR [SI],0 JZ PRINTERS_END INC SI INC SI INC AL DEC AH JNZ NEXT_PRINTERS PRINTERS_END: POP DS MOV PRINTER_CNT,AL RET ;--------------; T_MENU LABEL BYTE DB "Select text description then press Enter to change text. Esc to Exit",0 TEXT_M DB "Text descriptions",0 DB "~~~~~~~~~~~~~~~~~",0 TEXT_INDEX DW 0 TEXT_MENU: CMP [TEXT_MENUS],INACTIVE JZ T_MENU_END1 CALL TEXT_DEFAULT MOV TEXT_INDEX,0 NEXT_T_MENU: MOV STATE,CUSTOM_TYPE MOV SI,OFFSET T_MENU CALL DISPLAY_MENU NEXT_T_MENU2: CALL DISP_TEXT CALL GETKEY JC T_MENU_END CMP AL,LEFT_SCAN JZ T_MENU_END CMP AH,CR JZ DO_TEXT CMP AL,RIGHT_SCAN JZ DO_TEXT CK_T_UP: MOV BX,TEXT_INDEX CMP AL,UP_SCAN JNZ CK_T_DN SUB BX,2 JC NEXT_T_MENU2 JMP SHORT TEXT_UPDATE CK_T_DN: CMP AL,DOWN_SCAN JNZ NEXT_T_MENU2 INC BX INC BX CMP BX,TEXT_MAX * 2 JAE NEXT_T_MENU2 CMP TEXT_MENUS[BX],INACTIVE JZ NEXT_T_MENU2 TEXT_UPDATE: MOV TEXT_INDEX,BX JMP NEXT_T_MENU2 DO_TEXT: CALL TEXT_SELECT JMP NEXT_T_MENU T_MENU_END1: CALL BEEP T_MENU_END: CALL CK_MODIFIED JC T_M_END CALL COPY_TEXT CALL SAVE T_M_END: RET ;--------------; TEXT_DEFAULT: PUSH DS MOV DS,PGM_BUFF_SEG XOR BX,BX XOR BP,BP NEXT_T_DEFAULT:CMP CS:[TEXT_MENUS.BX],INACTIVE JZ T_DEFAULT_END MOV SI,CS:[TEXT_ADDRS.BX] MOV DI,OFFSET TEXT_EDIT ADD DI,BP MOV CX,CS:[TEXT_LENGTH.BX] CMP CX,STRING_MAX JB GET_DEF MOV CX,STRING_MAX - 1 GET_DEF: REP MOVSB XOR AL,AL STOSB ADD BP,STRING_MAX INC BX INC BX CMP BX,TEXT_MAX * 2 JB NEXT_T_DEFAULT T_DEFAULT_END: POP DS RET ;--------------; T_EDIT_ADDR DW ? DISP_TEXT: MOV AX,TEXT_TOP CALL CALC_ADDR ADD DI,SELECT_START MOV BH,COLOR.W PUSH DI MOV SI,OFFSET TEXT_M CALL WRITE_STRING POP DI ADD DI,CRT_WIDTH PUSH DI CALL WRITE_STRING POP DI ;--------------; XOR BP,BP MOV T_EDIT_ADDR,OFFSET TEXT_EDIT NEXT_TEXT_DES: MOV SI,TEXT_MENUS[BP] CMP SI,INACTIVE JZ TEXT_DES_END ADD DI,CRT_WIDTH PUSH DI MOV CX,STRING_MAX MOV BH,COLOR.W CMP TEXT_INDEX,BP JNZ WRITE_DESC2 MOV BH,COLOR.C CMP STATE,CUSTOM_TYPE JZ WRITE_DESC2 MOV BH,COLOR.A WRITE_DESC2: PUSH DS MOV DS,ZIF_BUFF_SEG CALL WRITE_LINE CALL PAD_LINE POP DS MOV BH,COLOR.W MOV SI,T_EDIT_ADDR MOV CX,TEXT_LENGTH[BP] CALL WRITE_LINE POP DI ADD T_EDIT_ADDR,STRING_MAX INC BP INC BP CMP BP,TEXT_MAX * 2 JB NEXT_TEXT_DES TEXT_DES_END: RET ;----------------------------------------------; TEXT_M2 LABEL BYTE DB "Edit text then press Enter. Esc to cancel",0 TEXT_SELECT: MOV STATE,SELECT_TYPE CALL DISP_TEXT MOV SI,OFFSET TEXT_M2 CALL DISPLAY_MENU MOV AX,TEXT_INDEX MOV BX,AX MOV CX,TEXT_LENGTH[BX] SHR AX,1 ADD AX,TEXT_TOP + 2 MUL CRT_WIDTH ADD AX,SELECT_START + (STRING_MAX * 2) MOV SCREEN_START,AX MOV AX,STRING_MAX SHR BX,1 MUL BX ADD AX,OFFSET TEXT_EDIT MOV LINE_START,AX ADD AX,CX MOV LINE_END,AX MOV BH,COLOR.C MOV LEGAL_CHARS,OFFSET ALL_CHARS CALL EDITOR JC TEXT_S_END MOV MODIFY_FLAG,TRUE TEXT_S_END: RET ;----------------------------------------------; COPY_TEXT: PUSH ES MOV ES,PGM_BUFF_SEG XOR BX,BX MOV BP,OFFSET TEXT_EDIT NEXT_T_COPY: CMP TEXT_MENUS[BX],INACTIVE JZ COPY_T_END MOV SI,BP MOV DI,TEXT_ADDRS[BX] MOV CX,TEXT_LENGTH[BX] REP MOVSB INC BX INC BX ADD BP,STRING_MAX JMP NEXT_T_COPY COPY_T_END: POP ES RET ;--------------; N_MENU LABEL BYTE DB "Select number description then press Enter to change number. Esc to Exit",0 NUMBER_M DB "Number descriptions",0 DB "~~~~~~~~~~~~~~~~~~~",0 NUMBER_INDEX DW 0 NUMBER_MENU: CMP [NUMBER_MENUS],INACTIVE JZ N_MENU_END1 CALL NUM_DEFAULT MOV NUMBER_INDEX,0 NEXT_N_MENU: MOV STATE,CUSTOM_TYPE MOV SI,OFFSET N_MENU CALL DISPLAY_MENU NEXT_N_MENU2: CALL DISP_NUMBERS CALL GETKEY JC N_MENU_END CMP AL,LEFT_SCAN JZ N_MENU_END CMP AH,CR JZ DO_NUM CMP AL,RIGHT_SCAN JZ DO_NUM CK_N_UP: MOV BX,NUMBER_INDEX CMP AL,UP_SCAN JNZ CK_N_DN SUB BX,2 JC NEXT_N_MENU2 JMP SHORT NUM_UPDATE CK_N_DN: CMP AL,DOWN_SCAN JNZ NEXT_N_MENU2 INC BX INC BX CMP BX,NUM_MAX * 2 JAE NEXT_N_MENU2 CMP NUMBER_MENUS[BX],INACTIVE JZ NEXT_N_MENU2 NUM_UPDATE: MOV NUMBER_INDEX,BX JMP NEXT_N_MENU2 DO_NUM: CALL NUMBER_SELECT JMP NEXT_N_MENU N_MENU_END1: CALL BEEP N_MENU_END: CALL CK_MODIFIED JC N_M_END CALL COPY_NUMBERS CALL SAVE N_M_END: RET ;----------------------------------------------; NUM_DEFAULT: PUSH DS MOV DS,PGM_BUFF_SEG XOR BX,BX MOV BP,OFFSET NUMBER_EDIT NEXT_N_DEFAULT:CMP CS:[NUMBER_MENUS.BX],INACTIVE JZ N_DEFAULT_END MOV SI,CS:[NUMBER_ADDRS.BX] MOV AX,[SI] CMP BYTE PTR CS:[NUMBER_TYPE.BX],"W" JZ GOT_NUM_VAL XOR AH,AH GOT_NUM_VAL: MOV DI,BP CALL DECIMAL_ASCII ADD BP,INTEGER_MAX INC BX INC BX CMP BX,NUM_MAX * 2 JB NEXT_N_DEFAULT N_DEFAULT_END: POP DS RET ;----------------------------------------------; DECIMAL_ASCII: PUSH BX MOV BX,10 ;Divisor of ten. XOR CX,CX ;Zero in counter. NEXT_COUNT: XOR DX,DX ;Zero in high half. DIV BX ;Divide by ten. ADD DL,"0" ;Convert to ASCII. PUSH DX ;Save results. INC CX ;Also increment count. OR AX,AX ;Are we done? JNZ NEXT_COUNT ;Continue until zero. MOV SI,INTEGER_MAX - 1 SUB SI,CX NEXT_DEC_STORE:POP AX ;Retrieve numbers. STOSB LOOP NEXT_DEC_STORE MOV CX,SI JCXZ DEC_END MOV AL,SPACE REP STOSB DEC_END: XOR AL,AL STOSB POP BX RET ;----------------------------------------------; N_EDIT_ADDR DW ? DISP_NUMBERS: MOV AX,NUMBER_TOP CALL CALC_ADDR ADD DI,SELECT_START MOV BH,COLOR.W PUSH DI MOV SI,OFFSET NUMBER_M CALL WRITE_STRING POP DI ADD DI,CRT_WIDTH PUSH DI CALL WRITE_STRING POP DI ;--------------; XOR BP,BP MOV N_EDIT_ADDR,OFFSET NUMBER_EDIT NEXT_NUM_DES: MOV SI,NUMBER_MENUS[BP] CMP SI,INACTIVE JZ NUM_DES_END ADD DI,CRT_WIDTH PUSH DI MOV BH,COLOR.W CMP NUMBER_INDEX,BP JNZ WRITE_DESC3 MOV BH,COLOR.C CMP STATE,CUSTOM_TYPE JZ WRITE_DESC3 MOV BH,COLOR.A WRITE_DESC3: PUSH DS MOV DS,ZIF_BUFF_SEG MOV CX,STRING_MAX CALL WRITE_LINE CALL PAD_LINE POP DS MOV BH,COLOR.W MOV SI,N_EDIT_ADDR CALL WRITE_STRING POP DI ADD N_EDIT_ADDR,INTEGER_MAX INC BP INC BP CMP BP,NUM_MAX * 2 JB NEXT_NUM_DES NUM_DES_END: RET ;----------------------------------------------; NUMBER_M2 LABEL BYTE DB "Enter number between " RANGE_L EQU $ - NUMBER_M2 DB " Esc to cancel",0 NUMBER_SELECT: MOV STATE,SELECT_TYPE CALL DISP_NUMBERS CALL MENU_OFFSET MOV BH,COLOR.B PUSH DI MOV SI,OFFSET NUMBER_M2 CALL WRITE_STRING MOV BP,NUMBER_INDEX MOV AX,RANGE_LOW[BP] MOV DI,OFFSET NUMBER_RANGE CALL DECIMAL_ASCII POP DI ADD DI,RANGE_L * 2 MOV SI,OFFSET NUMBER_RANGE NEXT_RANGE: LODSB CMP AL,SPACE JA NEXT_RANGE MOV BYTE PTR [SI-1],0 MOV SI,OFFSET NUMBER_RANGE CALL WRITE_STRING MOV AL,"-" CALL WRITE_SCREEN PUSH DI MOV AX,RANGE_HIGH[BP] MOV DI,OFFSET NUMBER_RANGE CALL DECIMAL_ASCII POP DI MOV SI,OFFSET NUMBER_RANGE CALL WRITE_STRING MOV AX,NUMBER_INDEX MOV BX,AX SHR AX,1 ADD AX,NUMBER_TOP + 2 MUL CRT_WIDTH ADD AX,SELECT_START + (STRING_MAX * 2) MOV SCREEN_START,AX MOV AX,INTEGER_MAX SHR BX,1 MUL BX ADD AX,OFFSET NUMBER_EDIT MOV LINE_START,AX ADD AX,INTEGER_MAX - 1 MOV LINE_END,AX MOV BH,COLOR.C MOV LEGAL_CHARS,OFFSET NUMBER_CHARS CALL EDITOR JC NUM_S_END MOV SI,LINE_START CALL PARSE_LINE JC NUM_S_END2 CALL GET_NUMBER JC NUMBER_ERROR MOV BP,NUMBER_INDEX CMP AX,RANGE_LOW[BP] JB NUMBER_ERROR CMP AX,RANGE_HIGH[BP] JA NUMBER_ERROR NUM_S_END2: MOV MODIFY_FLAG,TRUE NUM_S_END: RET NUMBER_ERROR: MOV SI,OFFSET NUMBER_ERR CALL BACKUP_ERR2 PUSH DS MOV BX,NUMBER_INDEX MOV SI,DS:[NUMBER_ADDRS.BX] MOV DS,PGM_BUFF_SEG MOV AX,[SI] POP DS CMP BYTE PTR [NUMBER_TYPE.BX],"W" JZ RESTORE_NUM XOR AH,AH RESTORE_NUM: MOV DI,LINE_START CALL DECIMAL_ASCII JMP NUM_S_END ;----------------------------------------------; COPY_NUMBERS: PUSH ES MOV ES,PGM_BUFF_SEG XOR BX,BX MOV BP,OFFSET NUMBER_EDIT NEXT_N_COPY: CMP NUMBER_MENUS[BX],INACTIVE JZ COPY_N_END MOV SI,BP CALL PARSE_LINE JC LOOP_N_COPY CALL GET_NUMBER JC LOOP_N_COPY MOV DI,NUMBER_ADDRS[BX] CMP BYTE PTR NUMBER_TYPE[BX],"W" JZ COPY_WORD STOSB JMP SHORT LOOP_N_COPY COPY_WORD: STOSW LOOP_N_COPY: INC BX INC BX ADD BP,INTEGER_MAX JMP NEXT_N_COPY COPY_N_END: POP ES RET ;----------------------------------------------; DISP_CUSTOM: MOV AX,LISTING_TOP CALL CALC_ADDR ADD DI,CUSTOM_START MOV SI,OFFSET CATEGORY + SIZE CAT MOV BP,LISTING_LEN NEXT_CUSTOM: PUSH SI PUSH DI MOV CX,CRT_WIDTH SUB CX,CUSTOM_START SHR CX,1 CMP SI,OFFSET CAT_END JAE PAD_CUSTOM CMP [SI.CAT_STATUS],INACTIVE JZ GET_INACTIVE CMP SI,CUSTOM_ADDR JNZ CK_CUST_COLOR MOV BH,COLOR.C CMP STATE,FILE_TYPE JZ DISPLAY_CUST MOV BH,COLOR.A JMP SHORT DISPLAY_CUST CK_CUST_COLOR: MOV BH,COLOR.I CMP STATE,LISTING_TYPE JNZ DISPLAY_CUST MOV BH,COLOR.W JMP SHORT DISPLAY_CUST GET_INACTIVE: MOV BH,COLOR.T CMP SI,CUSTOM_ADDR JZ DISPLAY_CUST MOV BH,COLOR.S DISPLAY_CUST: ADD SI,SIZE CAT_STATUS + SIZE CAT_LEN MOV AL,"[" CALL WRITE_CHAR DEC CX CALL WRITE_LINE MOV BH,COLOR.W CALL PAD_LINE CK_LAST_CUST: POP DI POP SI ADD DI,CRT_WIDTH CMP SI,OFFSET CAT_END JAE LOOP_CUST ADD SI,SIZE CAT LOOP_CUST: DEC BP JNZ NEXT_CUSTOM RET PAD_CUSTOM: MOV BH,COLOR.W CALL PAD_LINE JMP SHORT CK_LAST_CUST ;----------------------------------------------; TOP_WINDOW LABEL BYTE DB "╔════════════════════════════════════════╗",0 WINDOW_LEN EQU $ - TOP_WINDOW BOTTOM_WINDOW LABEL BYTE DB "╚════════════════════════════════════════╝",0 MODIFY_MENU LABEL BYTE DB "║ Do you wish to save your changes? Y/N ║",0 BACKUP_MENU LABEL BYTE DB "║ Backup up program first? Y/N ║",0 OVERWRITE_MENU LABEL BYTE DB "║ Backup file exists. Overwrite? Y/N ║",0 DISK_FULL_MENU LABEL BYTE DB "║ Not enough disk space. Press any key. ║",0 BACKUP_FAIL LABEL BYTE DB "║ Backup failed. Press any key. ║",0 SAVE_FAIL LABEL BYTE DB "║ Save failed. Press any key. ║",0 NUMBER_ERR LABEL BYTE DB "║ Number out of range. Press any key. ║",0 CK_MODIFIED: CMP MODIFY_FLAG,TRUE JNZ NO_MODIFY MOV MODIFY_FLAG,FALSE NEXT_MODIFY: MOV SI,OFFSET MODIFY_MENU CALL DISP_WINDOW CALL CLEAR_KEY CALL GETKEY CMP AL,ESC_SCAN JZ NO_MODIFY CMP AL,N_SCAN JZ NO_MODIFY CMP AL,Y_SCAN JNZ NEXT_MODIFY CK_BACKUP: CMP BACKUP_FLAG,TRUE JZ YES_MODIFY MOV SI,OFFSET BACKUP_MENU CALL DISP_WINDOW CALL CLEAR_KEY GET_MODIFY: CALL GETKEY CMP AL,ESC_SCAN JZ NO_MODIFY CMP AL,N_SCAN JZ YES_MODIFY CMP AL,Y_SCAN JNZ GET_MODIFY CALL DO_BACKUP JC NEXT_MODIFY YES_MODIFY: CALL CLEAR_MODIFIED CLC JMP SHORT MODIFIED_END NO_MODIFY: CALL CLEAR_MODIFIED STC MODIFIED_END: RET ;----------------------------------------------; ; OUTPUT: CF=1 if failed. READ_HANDLE DW ? WRITE_HANDLE DW ? DO_BACKUP: CALL MAKE_BACKUP MOV DX,OFFSET BACKUP_NAME XOR CX,CX MOV AH,4EH INT 21H JNC OVERWRITE CALL GET_FREE JNC FREE_SPACE2 JMP BACKUP_END OVERWRITE: MOV SI,OFFSET OVERWRITE_MENU CALL DISP_WINDOW CALL CLEAR_KEY CALL GETKEY CMP AL,Y_SCAN JZ GET_DISK CMP AL,ESC_SCAN JNZ CK_OVER2 STC JMP BACKUP_END2 CK_OVER2: CMP AL,N_SCAN JNZ OVERWRITE JMP BACKUP_END GET_DISK: CALL GET_FREE JNC FREE_SPACE JMP BACKUP_ERR FREE_SPACE: ADD AX,DTA.SIZE_LOW ADC DX,DTA.SIZE_HIGH FREE_SPACE2: SUB AX,FILE_SIZE[0] SBB DX,FILE_SIZE[2] JNC CREATE MOV SI,OFFSET DISK_FULL_MENU JMP SHORT BACKUP_ERR2 CREATE: MOV DX,OFFSET BACKUP_NAME XOR CX,CX MOV AH,3CH INT 21H JNC DO_BACKUP2 JMP SHORT BACKUP_ERR DO_BACKUP2: MOV WRITE_HANDLE,AX MOV DX,OFFSET ASCIIZ_NAME MOV AX,3D00H INT 21H JC CLOSE_READ MOV READ_HANDLE,AX XOR DX,DX NEXT_BACKUP: MOV BX,READ_HANDLE MOV CX,BAC_BUFF_SIZE * KILOBYTES - 1 PUSH DS MOV DS,BAC_BUFF_SEG MOV AH,3FH INT 21H POP DS JC CLOSE_READ OR AX,AX JZ CLOSE_READ MOV CX,AX MOV BX,WRITE_HANDLE PUSH DS MOV DS,BAC_BUFF_SEG MOV AH,40H INT 21H POP DS JC CLOSE_READ CMP CX,AX STC JNZ CLOSE_READ CMP CX,BAC_BUFF_SIZE * KILOBYTES - 1 JZ NEXT_BACKUP CLC CLOSE_READ: PUSHF MOV BX,READ_HANDLE MOV AH,3EH INT 21H POPF CLOSE_WRITE: PUSHF MOV BX,WRITE_HANDLE MOV AH,3EH INT 21H POPF JC BACKUP_ERR BACKUP_END: MOV BACKUP_FLAG,TRUE CALL CLEAR_MODIFIED MOV FAIL_FLAG,FALSE CLC BACKUP_END2: RET BACKUP_ERR: MOV SI,OFFSET BACKUP_FAIL BACKUP_ERR2: CALL DISP_WINDOW CALL BEEP CALL GETKEY CALL CLEAR_MODIFIED MOV FAIL_FLAG,FALSE STC RET ;----------------------------------------------; GET_FREE: MOV DL,PGM_DRIVE INC DL MOV AH,36H ;Disk free space. INT 21H CMP AX,-1 STC JZ DISK_FREE_END MUL BX ;Sectors per cluster * clusters PUSH DX MUL CX ;Result times bytes per cluster MOV BX,AX POP AX PUSH DX MUL CX POP DX ADD DX,AX MOV AX,BX CLC DISK_FREE_END: RET ; = available bytes. ;----------------------------------------------; BAK DB ".BAK",0 MAKE_BACKUP: MOV SI,OFFSET ASCIIZ_NAME MOV DI,OFFSET BACKUP_NAME MOV CX,8 NEXT_BACK: LODSB CMP AL,"." JZ BAK_EXT OR AL,AL JZ BAK_EXT STOSB LOOP NEXT_BACK BAK_EXT: MOV SI,OFFSET BAK MOV CX,5 REP MOVSB RET ;----------------------------------------------; ; INPUT: SI-> window. DISP_WINDOW: CALL CALC_WIN MOV BH,COLOR.W PUSH DI PUSH SI MOV SI,OFFSET TOP_WINDOW CALL WRITE_STRING POP SI POP DI ADD DI,CRT_WIDTH PUSH DI CALL WRITE_STRING POP DI ADD DI,CRT_WIDTH MOV SI,OFFSET BOTTOM_WINDOW CALL WRITE_STRING RET ;----------------------------------------------; CLEAR_MODIFIED:CALL CALC_WIN MOV BH,COLOR.W MOV AL,SPACE MOV SI,3 NEXT_CLEAR_M: PUSH DI MOV CX,WINDOW_LEN CALL REPEAT_CHAR POP DI ADD DI,CRT_WIDTH DEC SI JNZ NEXT_CLEAR_M RET ;----------------------------------------------; CALC_WIN: MOV AL,ROWS DEC AL DEC AL DEC AL XOR AH,AH CALL CALC_ADDR ADD DI,SELECT_START RET ;----------------------------------------------; SAVE: CALL MAKE_FILENAME MOV DX,OFFSET ASCIIZ_NAME MOV AX,3D01H INT 21H JC SAVE_ERR CMP FAIL_FLAG,TRUE JZ SAVE_ERR MOV BX,AX MOV CX,PGM_BYTES XOR DX,DX PUSH DS MOV DS,PGM_BUFF_SEG MOV AH,40H INT 21H POP DS PUSHF MOV AH,3EH INT 21H POPF JNC SAVE_END SAVE_ERR: MOV SI,OFFSET SAVE_FAIL CALL DISP_WINDOW CALL BEEP CALL GETKEY CALL CLEAR_MODIFIED STC SAVE_END: MOV FAIL_FLAG,FALSE RET ;----------------------------------------------; CLEAR_FILE: PUSH ES PUSH DI MOV AX,LISTING_TOP CALL CALC_ADDR ADD DI,CUSTOM_START MOV BP,LISTING_LEN MOV DX,STATUS_REG ;Retrieve status register. MOV ES,VIDEO_SEG MOV BH,COLOR.W MOV AL,SPACE NEXT_CLEAR: PUSH DI MOV CX,CRT_WIDTH SUB CX,CUSTOM_START SHR CX,1 NEXT_CLEAR2: CALL WRITE_CHAR LOOP NEXT_CLEAR2 POP DI ADD DI,CRT_WIDTH DEC BP JNZ NEXT_CLEAR POP DI POP ES RET ;--------------------------------------------------------------; ; OUTPUT: ASCIIZ_NAME = filename MAKE_ZIF_NAME: PUSH DS MOV SI,BAR_ADDR MOV DS,FILENAME_SEG ;DS:SI -> Source name. MOV DI,OFFSET ASCIIZ_NAME ;Name storage. MOV CX,8 ;8 characters of name. NEXT_NAME2: LODSB CMP AL,SPACE ;End of name? JZ EXTENSION3 ;If yes, do extension. STOSB LOOP NEXT_NAME2 EXTENSION3: POP DS MOV SI,OFFSET ZIF_EXT MOV CX,ZIF_LEN REP MOVSB RET ;----------------------------------------------; MAKE_FILENAME: PUSH DS MOV SI,BAR_ADDR MOV DS,FILENAME_SEG ;DS:SI -> Source name. MOV BP,SI MOV DI,OFFSET ASCIIZ_NAME ;Name storage. MOV CX,8 ;8 characters of name. NEXT_NAME: LODSB CMP AL,SPACE ;End of name? JZ EXTENSION2 ;If yes, do extension. STOSB LOOP NEXT_NAME EXTENSION2: MOV SI,BP ;Retrieve name start. ADD SI,9 ;Move to extension field. CMP BYTE PTR [SI],SPACE ;Is there any extension? JZ NAME_DONE ;If no, done. MOV AL,"." ;Else, add delimiting dot. STOSB MOV CX,3 ;3 characters for extension. NEXT_EXT: LODSB CMP AL,SPACE JZ NAME_DONE STOSB LOOP NEXT_EXT NAME_DONE: XOR AL,AL ;ASCIIZ. STOSB POP DS RET ;----------------------------------------------; DISP_LISTING: PUSH DS PUSH ES MOV AX,LISTING_TOP CALL CALC_ADDR MOV SI,LISTING_ADDR MOV BP,LISTING_LEN MOV DX,STATUS_REG ;Retrieve status register. MOV ES,VIDEO_SEG ;Point to screen segment. MOV DS,FILENAME_SEG NEXT_LISTING: PUSH DI MOV CX,SIZE FILE_RECORD DISPLAY_LINE: MOV BH,CS:COLOR.I CMP BYTE PTR [SI],-1 JZ PAD_LISTING CMP SI,CS:BAR_ADDR JZ CK_BAR_COLOR CMP CS:STATE,FILE_TYPE JNZ DISPLAY_LINE2 MOV BH,CS:COLOR.W JMP SHORT DISPLAY_LINE2 CK_BAR_COLOR: MOV BH,CS:COLOR.C CMP CS:STATE,FILE_TYPE JNZ DISPLAY_LINE2 MOV BH,CS:COLOR.A DISPLAY_LINE2: LODSB CALL WRITE_CHAR LOOP DISPLAY_LINE2 CK_LAST_LINE: POP DI ADD DI,CS:CRT_WIDTH DEC BP JNZ NEXT_LISTING POP ES POP DS RET PAD_LISTING: CALL PAD_LINE JMP SHORT CK_LAST_LINE ;--------------; PAD_LINE: JCXZ PAD_LINE_END MOV AL,SPACE PAD_LINE2: CALL WRITE_CHAR LOOP PAD_LINE2 PAD_LINE_END: RET ;----------------------------------------------; ; Keeps track of a variable length field in CX while writing string. WRITE_LINE: LODSB OR AL,AL JZ WRITE_LINE_END CALL WRITE_CHAR LOOP WRITE_LINE WRITE_LINE_END:RET ;--------------; DUMMY_RET: RET ;----------------------------------------------; ZIF_DIR_MENU DB " Zif Directory is ",0 PGM_DIR_MENU DB " Utility Directory is ",0 HEADING DB "Utilities ",0,"Custom Categories",0 DB "~~~~~~~~~ ",0,"~~~~~~~~~~~~~~~~~",0 DISP_DIR: MOV BH,COLOR.B MOV DI,CRT_WIDTH MOV CX,DI SHR CX,1 PUSH DI MOV SI,OFFSET ZIF_DIR_MENU CALL WRITE_LINE MOV AL,ZIF_DRIVE ADD AL,"A" CALL WRITE_CHAR DEC CX MOV AL,":" CALL WRITE_CHAR DEC CX MOV SI,OFFSET ZIF_DIR CALL WRITE_LINE CALL PAD_LINE POP DI MOV CX,CRT_WIDTH ADD DI,CX PUSH DI SHR CX,1 MOV SI,OFFSET PGM_DIR_MENU CALL WRITE_LINE MOV AL,PGM_DRIVE ADD AL,"A" CALL WRITE_CHAR DEC CX MOV AL,":" CALL WRITE_CHAR DEC CX MOV SI,OFFSET PGM_DIR CALL WRITE_LINE CALL PAD_LINE POP DI MOV CX,CRT_WIDTH ADD DI,CX SHR CX,1 PUSH DI MOV BH,COLOR.W MOV SI,OFFSET HEADING CALL WRITE_LINE INC DI INC DI DEC CX CALL WRITE_LINE CALL PAD_LINE POP DI MOV CX,CRT_WIDTH ADD DI,CX SHR CX,1 CALL WRITE_LINE INC DI INC DI DEC CX CALL WRITE_LINE CALL PAD_LINE RET ;---------------------------------------------------; ; Insertion sort; Doesn't destroy secondary sorts. ; ;---------------------------------------------------; SORT: MOV BP,LAST_ADDR XOR SI,SI ;SI = First record. MOV DI,SIZE FILE_RECORD ;DI = Second record. PUSH DS PUSH ES MOV ES,FILENAME_SEG MOV DS,FILENAME_SEG CMP BYTE PTR [SI],-1 JZ SORT_END CMP BYTE PTR [DI],-1 JZ SORT_END NEXT_SORT: CMP DI,BP ;Sort is done when last record. JA SORT_END PUSH SI ;Save record pointers. PUSH DI MOV AX,SI ;Carry source pointer in AX. MOV DX,DI ;Carry destination pointer in DX. NEXT_RECORD: MOV CX,SIZE FILE_RECORD ;Field length. COMPARE: REPZ CMPSB ;Compare the fields. JBE NO_SWITCH ;If below or equal, no switch. SWAP: CMP DX,TEMP_RECORD ;Else, if DX points to temporary JZ DO_SWAP ; storage, safe to move. MOV SI,DX ;Else, move destination record MOV DX,TEMP_RECORD ; to temporary storage. MOV DI,DX MOV CX,SIZE FILE_RECORD / 2 REP MOVSW DO_SWAP: MOV SI,AX ;Restore source pointer MOV DI,SI ;Destination = source + ADD DI,SIZE FILE_RECORD ; field size. MOV CX,SIZE FILE_RECORD / 2 REP MOVSW ;Move the record. MOV DI,DX ;Prepare for next compare. SUB AX,SIZE FILE_RECORD ;Destination = temporary. MOV SI,AX ;Move one record towards start. JNC NEXT_RECORD NO_SWITCH: MOV SI,TEMP_RECORD ;If DX doesn't point to temporary CMP DX,SI ; storage, no move was made; next JNZ NEXT_INSERT ; compare. MOV DI,AX ;Else, move temporary record ADD DI,SIZE FILE_RECORD ; into last move location. MOV CX,SIZE FILE_RECORD / 2 REP MOVSW NEXT_INSERT: POP DI ;Restore outside loop pointers. POP SI ADD SI,SIZE FILE_RECORD ;Move both source and destination ADD DI,SIZE FILE_RECORD ; to the next record. JMP NEXT_SORT SORT_END: POP ES POP DS MOV FILE_CURRENT,FALSE RET ;----------------------------------------------; ; OUTPUT: CF=1 if illegal parameter; DX-> illegal parameter. PARSE: MOV SI,81H MOV DI,OFFSET ZIF_DRIVE CALL PARSE_IT CALL RESTORE_DIR CALL PARSE_DELIMIT CMP BYTE PTR [SI],SPACE JA PARSE_PGM COPY_ZIF: MOV SI,OFFSET ZIF_DRIVE MOV DI,OFFSET PGM_DRIVE MOV CX,SPEC_SIZE REP MOVSB CLC JMP SHORT PARSE_END PARSE_PGM: CMP BYTE PTR [SI],";" JNZ PARSE_PGM2 INC SI PARSE_PGM2: MOV DI,OFFSET PGM_DRIVE CALL PARSE_IT JC COPY_ZIF PARSE_END: RET ;----------------------------------------------; ; INPUT: SI-> parameter; DI-> storage. ; OUTPUT: CF=1 if illegal parameter; DX-> illegal parameter; SI-> parameter end. PARSE_IT: CALL PARSE_DELIMIT MOV BX,SI ;Filespec start. NEXT_PARSE: LODSB CMP AL,";" JZ PARSE_DRIVE CMP AL,"," JZ PARSE_DRIVE CMP AL,"/" JZ PARSE_DRIVE CMP AL,SPACE JBE PARSE_DRIVE CMP AL,":" JNZ NEXT_PARSE MOV DL,[SI-2] AND DL,5FH ;Capitalize. SUB DL,"A" ;Convert to DOS format. CALL SELECT_DISK MOV BX,SI ;Save as filename start. JMP NEXT_PARSE ;Continue parsing. PARSE_DRIVE: MOV AH,19H INT 21H STOSB PUSH SI MOV SI,OFFSET CURRENT_DIR CALL GET_DIR POP SI DEC SI CMP SI,BX JZ PARSE_DIR PUSH [SI] MOV BYTE PTR [SI],0 MOV DX,BX CALL CHANGE_DIR POP [SI] PARSE_DIR: PUSHF PUSH SI MOV SI,DI CALL GET_DIR POP SI POPF PARSE_DIR_END: MOV DX,BX RET ;-----------------------------------------------------------------; ; INPUT: SI -> string; OUTPUT SI -> first non-white space. ; ;-----------------------------------------------------------------; PARSE_DELIMIT: NEXT_DELIMIT: LODSB ;Get a byte. OR AL,AL JZ LEADING_END2 CMP AL,CR JZ LEADING_END2 CMP AL,SPACE ;Is it a space char or below? JBE NEXT_DELIMIT LEADING_END2: DEC SI ;Else, adjust pointer to RET ; string start. ;----------------------------------------------; PARSE_LINES: CALL PARSE_LINE JNC PARSE_LINE_END CMP AL,LF JZ PARSE_LINES JMP SHORT NO_PARA2 PARSE_LINE: LODSB CMP AL,CTRL_Z JZ NO_PARA CMP AL,"[" JZ NO_PARA CMP AL,LF JZ NO_PARA2 CMP AL,SPACE JBE PARSE_LINE CMP AL,"=" JZ PARSE_LINE CMP AL,";" JZ COMMENTS CLC DEC SI PARSE_LINE_END:RET COMMENTS: LODSB CMP AL,CTRL_Z JZ NO_PARA CMP AL,LF JZ NO_PARA2 JMP COMMENTS NO_PARA: DEC SI NO_PARA2: STC RET ;----------------------------------------------; ; INPUT: SI -> ASCII number. ; OUTPUT: CF=1 if no number. CX:AX = number. NUM_FLAG DB ? GET_NUMBER: PUSH SI NEXT_CAP2: LODSB CMP AL,SPACE JBE GET_TYPE CMP AL,"a" JB NEXT_CAP2 CMP AL,"z" JA NEXT_CAP2 AND BYTE PTR [SI-1],5FH JMP NEXT_CAP2 GET_TYPE: POP SI PUSH SI NEXT_TYPE: LODSB CMP AL,SPACE JBE A_NUMBER CMP AL,"A" JB NEXT_TYPE CMP AL,"H" JA NEXT_TYPE POP SI CALL DO_HEX JMP SHORT NUMBER_END A_NUMBER: POP SI CALL DO_NUMBER NUMBER_END: RET ;--------------; DO_HEX: PUSH BX XOR BX,BX ;Start with zero. XOR CX,CX MOV CS:NUM_FLAG,0 ;Number exists flag. NEXT_HEX: LODSB ;Get a byte. CMP AL,CTRL_Z JZ HEX_END1 CMP AL,"H" JZ HEX_END2 CMP AL,COMMA JZ NEXT_HEX CMP AL,"-" JZ HEX_END2 CMP AL,SPACE JBE HEX_END2 SUB AL,"0" ;ASCII to binary. JC HEX_ERR ;If not 0 to 9, skip. CMP AL,9 ;Is it A - F ? JLE NOT_ALPHA ;If no, OK. SUB AL,7 ;Else, adjust for alpha. CMP AL,10 ;Is it punctuation? JB HEX_END2 ;If yes, skip. CMP AL,15 ;Is it valid? JA HEX_ERR ;If no, skip. NOT_ALPHA: MOV AH,4 NEXT_SHIFT2: SHL BX,1 RCL CX,1 DEC AH JNZ NEXT_SHIFT2 OR BL,AL ;Add to number. MOV CS:NUM_FLAG,1 JMP NEXT_HEX HEX_END1: DEC SI HEX_END2: MOV AX,BX CMP CS:NUM_FLAG,0 JZ HEX_ERR CLC HEX_END: POP BX RET HEX_ERR: STC POP BX RET ;--------------; DO_NUMBER: PUSH BX PUSH BP XOR BX,BX ;Start with zero. XOR CX,CX MOV CS:NUM_FLAG,0 ;Number exists flag. MOV BP,10 NEXT_NUMBER: LODSB XOR AH,AH ;Zero in high half. CMP AL,CTRL_Z JZ NUM_END1 CMP AL,COMMA JZ NEXT_NUMBER CMP AL,"-" JZ NUM_END2 CMP AL,SPACE ;Is byte a carriage return? JBE NUM_END2 ;If yes, done. CMP AL,COMMA JZ NEXT_NUMBER CMP AL,"0" ;Is byte a number? JB NUM_ERR CMP AL,"9" JA NUM_ERR ;If no, done. SUB AL,"0" ;Else, convert to hex. XCHG AX,BX ;Store in BX. MUL BP ;Multiply accumulated by 10. PUSH DX XCHG AX,CX MUL BP ADD BX,CX POP CX ADC CX,0 ADD CX,AX MOV CS:NUM_FLAG,1 ;Flag number found. JMP NEXT_NUMBER NUM_END1: DEC SI NUM_END2: MOV AX,BX CMP CS:NUM_FLAG,0 JZ NUM_ERR CLC NUM_END: POP BP POP BX RET NUM_ERR: STC POP BP POP BX RET ;----------------------------------------------; VIDEO_SETUP: PUSH ES MOV AX,500H ;Make sure active page is zero. INT 10H MOV AX,40H ;Point to the ROM BIOS data area MOV ES,AX MOV AX,ES:CRT_COLS MOV COLUMNS,AX SHL AX,1 MOV CRT_WIDTH,AX MOV AX,ES:[4EH] MOV CRT_START,AX MOV AX,ES:[63H] ADD AX,6 MOV CX,0B000H CMP AX,3BAH JZ STORE_SEG ADD CX,800H STORE_SEG: MOV STATUS_REG,AX MOV VIDEO_SEG,CX MOV SI,OFFSET MONO_ATTR MOV AL,ES:CRT_MODE ;Retrieve current video mode. CMP AL,7 ;Is it mono mode? JZ GET_ROWS ;If yes, continue. CMP AL,2 ;Is it BW80? JZ GET_ROWS ;If yes, continue. MOV SI,OFFSET COLOR_ATTR CMP AL,3 ;Is it mode CO80? JZ GET_ROWS ;If yes, continue. MOV AX,3 ;Else, change video mode to CO80. INT 10H GET_ROWS: XOR BH,BH MOV DL,24 MOV AX,1130H INT 10H MOV ROWS,DL ;Store rows. SUB DL,MENU_LINES - 1 XOR DH,DH MOV LISTING_LEN,DX POP ES MOV DI,OFFSET COLOR MOV CX,SIZE COLOR_ATTRIBS REP MOVSB ;----------------------------------------------; DISPLAY_SETUP: CALL CLS ;Clear screen. CMP BORDER_FLAG,1 JZ DO_COPYRIGHT MOV BL,COLOR.W ;Turn on border. AND BL,7 XOR BH,BH MOV AH,0BH INT 10H DO_COPYRIGHT: XOR AX,AX CALL CALC_ADDR INC DI INC DI MOV SI,OFFSET COPYRIGHT ;Point to copyright message. MOV BH,COLOR.B ;Use header attribute. CALL WRITE_STRING ;And display it. RET ;----------------------------------------------; ; INPUT: SI-> menu. DISPLAY_MENU: CALL MENU_OFFSET MOV BH,COLOR.B CALL WRITE_STRING RET ;*************LINE EDITOR**********************; LINE_START DW ? LINE_END DW ? SCREEN_START DW ? ;INPUT: BH=color; LINE_START=buffer position; LINE_END; SCREEN_START. ;OUTPUT: CY=1 if Esc pressed. EDITOR: MOV DI,LINE_START CALL EDIT_CURSOR CALL DISP_EDIT EDITOR2: CALL CK_KEY JZ EDITOR2 OR AL,AL JZ NEXT_EDIT CMP AL,CR JZ NEXT_EDIT CMP AH,ESC_SCAN JZ NEXT_EDIT MOV CX,LINE_END SUB CX,LINE_START PUSH DI MOV AL,SPACE REP STOSB POP DI NEXT_EDIT: CALL EDIT_CURSOR CALL DISP_EDIT CALL GETKEY XCHG AL,AH NEXT_EDIT2: JNC DO_EDIT JMP EDITOR_END DO_EDIT: MOV DX,LINE_START MOV CX,LINE_END CMP AH,ENTER_SCAN JNZ CK_RIGHT JMP EDITOR_DONE CK_RIGHT: CMP AX,RIGHT_SCAN SHL 8 JNZ CK_LEFT CMP DI,CX JZ NEXT_EDIT INC DI CK_LEFT: CMP AX,LEFT_SCAN SHL 8 JNZ CK_BS CMP DI,DX JZ NEXT_EDIT DEC DI JMP NEXT_EDIT CK_BS: CMP AH,BS_SCAN JNZ CK_DEL CMP DI,DX JZ NEXT_EDIT DEC DI CALL CK_INSERT JNZ DO_DEL1 MOV BYTE PTR [DI],SPACE JMP NEXT_EDIT CK_DEL: CMP AX,DEL_SCAN SHL 8 JNZ CK_HOME DO_DEL1: CALL DO_DEL JMP NEXT_EDIT CK_HOME: CMP AX,HOME_SCAN SHL 8 JNZ CK_END2 MOV DI,DX CK_END2: CMP AX,END_SCAN SHL 8 JNZ CK_ASCII MOV DI,CX NEXT_CK_END2: CMP DI,DX JZ NEXT_EDIT CMP BYTE PTR [DI-1],SPACE JNZ NEXT_EDIT DEC DI JMP NEXT_CK_END2 CK_ASCII: CALL CK_LEGAL JC NEXT_EDIT CMP DI,CX JAE NEXT_EDIT CALL CK_INSERT JNZ DO_INSERT STOSB JMP NEXT_EDIT DO_INSERT: MOV DX,DI DEC CX MOV DI,CX SUB CX,DX JZ DO_INSERT2 MOV SI,DI DEC SI STD REP MOVSB CLD DO_INSERT2: MOV DI,DX STOSB JMP NEXT_EDIT EDITOR_DONE: CLC EDITOR_END: PUSHF CALL HIDE_CURSOR POPF RET ;--------------; LEGAL_CHARS DW ? NUMBERS DB "1234567890abcdefhABCDEFH" NUMBERS_LEN EQU $ - NUMBERS CK_LEGAL: CMP AL,SPACE JB ILLEGAL CMP AL,127 JA ILLEGAL JMP [LEGAL_CHARS] NUMBER_CHARS: PUSH DI PUSH CX MOV DI,OFFSET NUMBERS MOV CX,NUMBERS_LEN REPNZ SCASB POP CX POP DI JNZ ILLEGAL ALL_CHARS: CLC RET ILLEGAL: STC RET ;-------------------------- DO_DEL: PUSH DI MOV SI,DI INC SI DEC CX SUB CX,DI JS DEL_END REP MOVSB MOV BYTE PTR [DI],SPACE DEL_END: POP DI RET ;-------------------------- CK_INSERT: PUSH DS MOV DX,40H MOV DS,DX MOV DL,DS:[17H] TEST DL,80H ;Insert POP DS RET ;-------------------------- EDIT_CURSOR: MOV AX,SCREEN_START XOR DX,DX DIV CRT_WIDTH SHR DL,1 MOV DH,AL MOV AX,DI SUB AX,LINE_START ADD DL,AL CALL SET_CURSOR RET ;-------------------------- DISP_EDIT: PUSH DI MOV DI,SCREEN_START MOV SI,LINE_START CALL WRITE_STRING POP DI RET ;----------------------------------------------; ;INPUT: CX=char count; AX=character REPEAT_CHAR: PUSH AX CALL WRITE_SCREEN POP AX LOOP REPEAT_CHAR RET ;----------------------------------------------; ; INPUT: AX = Starting line; OUTPUT: DI = Video address. CALC_ADDR: MUL CRT_WIDTH ADD AX,CRT_START MOV DI,AX RET ;----------------------------------------------; ; INPUT: AL = character to write; BH = attribute. WRITE_SCREEN: PUSH ES MOV ES,CS:VIDEO_SEG ;Point to screen segment. MOV DX,CS:STATUS_REG ;Retrieve status register. MOV BL,AL ;Store character in BL. HORZ_RET: IN AL,DX ;Get status. RCR AL,1 ;Is it low? JC HORZ_RET ;If not, wait until it is. CLI ;No more interrupts. HWAIT: IN AL,DX ;Get status. RCR AL,1 ;Is it high? JNC HWAIT ;If no, wait until it is. MOV AX,BX ;Retrieve character; now it's OK STOSW ; to write to screen buffer. STI ;Interrupts back on. POP ES RET ;Return ;----------------------------------------------; ; INPUT: AL=character to write; BH=attribute. WRITE_CHAR: PUSH ES MOV DX,CS:STATUS_REG MOV ES,CS:VIDEO_SEG MOV BL,AL ;Store character in BL. HORZ_RET2: IN AL,DX ;Get status. RCR AL,1 ;Is it low? JC HORZ_RET2 ;If not, wait until it is. CLI ;No more interrupts. HWAIT2: IN AL,DX ;Get status. RCR AL,1 ;Is it high? JNC HWAIT2 ;If no, wait until it is. MOV AX,BX ;Retrieve character; now it's OK STOSW ; to write to screen buffer. STI ;Interrupts back on. POP ES RET ;Return ;----------------------------------------------; ; INPUT: SI -> to string to display; DI -> where to display it. ; Entry point is WRITE_STRING. WRITE_IT: CALL WRITE_SCREEN ;Write a character. WRITE_STRING: LODSB ;Retrieve a character. CMP AL,CR ;Keep writing until a carriage JA WRITE_IT ; return or zero encountered. RET ;----------------------------------------------; CLEAR_MENU: CALL MENU_OFFSET ;Calculate menu screen offset. PUSH DI MOV BH,COLOR.B ;Menu attribute. MOV CX,CRT_WIDTH ;Blank out the two lines of menu. SHR CX,1 NEXT_MENU: MOV AL,SPACE CALL WRITE_SCREEN LOOP NEXT_MENU POP DI RET ;----------------------------------------; ; OUTPUT: DI -> Screen offset for menu. ; ;----------------------------------------; MENU_OFFSET: MOV AL,ROWS XOR AH,AH CALL CALC_ADDR RET ;----------------------------------------------; CLS: MOV BH,COLOR.B ;Normal attribute. CLS2: XOR CX,CX ;Top left corner. MOV DL,BYTE PTR COLUMNS DEC DL MOV DH,ROWS MOV AX,600H ;Scroll active page. PUSH BP INT 10H POP BP RET ;----------------------------------------------; CLOSE_SCREEN: PUSH AX MOV BH,SCREEN_COLOR CALL CLS2 CMP BORDER_FLAG,1 JZ PLACE_CURSOR XOR BX,BX MOV AH,0BH INT 10H PLACE_CURSOR: XOR DX,DX CALL SET_CURSOR POP AX RET ;----------------------------------------------; BEEP: MOV BX,NOTE ;Tone frequency divisor. MOV DX,12H XOR AX,AX DIV BX MOV BX,AX ;8253 countdown. CALL DELAY ;Wait till clock rolls over. MOV AL,0B6H ;Channel 2 speaker functions. OUT 43H,AL ;8253 Mode Control. JMP $+2 ;IO delay. MOV AX,BX ;Retrieve countdown. OUT 42H,AL ;Channel 2 LSB. JMP $+2 MOV AL,AH ;Channel 2 MSB. OUT 42H,AL IN AL,61H ;Port B. OR AL,3 ;Turn on speaker. JMP $+2 OUT 61H,AL CALL DELAY ;Delay one second. IN AL,61H ;Get Port B again. AND AL,NOT 3 ;Turn speaker off. JMP $+2 OUT 61H,AL RET ;Done. ;-----------------------------; DELAY: PUSH DS ;Preserve data segment. MOV AX,40H ;Point to BIOS data segment. MOV DS,AX MOV AX,DS:[6CH] ;Retrieve timer low. NEXT_BEEP: MOV DX,DS:[6CH] ;Retrieve timer low. CMP DX,AX ;Have we timed out? JZ NEXT_BEEP ;If not, wait until second up. POP DS ;Restore data segment. RET ;----------------------------------------------; ; INPUT: SI-> DIR storage. GET_DIR: MOV BYTE PTR [SI],"\" ;DOS doesn't preface directory INC SI ; with slash so we must. XOR DL,DL MOV AH,47H ;Get current directory. INT 21H RET ;----------------------------------------------; HIDE_CURSOR: MOV DH,ROWS ;Retrieve CRT rows. INC DH ;Move one line below off screen. XOR DL,DL ;Column zero. SET_CURSOR: PUSH BX XOR BH,BH ;Page zero. MOV AH,2 ;Set cursor position. INT 10H POP BX RET ;----------------------------------------------; RESTORE_DIR: MOV DX,OFFSET CURRENT_DIR CALL CHANGE_DIR MOV DL,DEFAULT_DRIVE CALL SELECT_DISK RET ;----------------------------------------------; SELECT_DISK: MOV AH,0EH INT 21H RET ;----------------------------------------------; CHANGE_DIR: MOV AH,3BH ;Change current directory. INT 21H RET ;----------------------------------------------; SET_ZIF: CALL RESTORE_DIR MOV DL,ZIF_DRIVE CALL SELECT_DISK MOV SI,OFFSET CURRENT_DIR CALL GET_DIR MOV DX,OFFSET ZIF_DIR CALL CHANGE_DIR RET ;----------------------------------------------; SET_PGM: CALL RESTORE_DIR MOV DL,PGM_DRIVE CALL SELECT_DISK MOV SI,OFFSET CURRENT_DIR CALL GET_DIR MOV DX,OFFSET PGM_DIR CALL CHANGE_DIR RET ;----------------------------------------------; ; INPUT: AL=Scan code; AH=Char; DI -> Valid scan codes table; CX = Table length ; OUTPUT: AL=Scan code; AH=Char. DISPATCH: PUSH AX MOV BX,CX MOV DX,DI ADD DX,CX REPNZ SCASB JNZ DISPATCH_END GOT_DISPATCH: SUB BX,CX DEC BX SHL BX,1 ADD BX,DX CALL GET_PARAMS CALL [BX] ;Process the command. DISPATCH_END: POP AX RET ;----------------------------------------------; GET_PARAMS: MOV AX,SIZE FILE_RECORD MUL LISTING_LEN MOV BP,BAR_ADDR MOV DX,LISTING_ADDR MOV CX,LAST_ADDR PARAMS_END: RET ;----------------------------------------------; GETKEY: TEST KBD_STATUS,80H JNZ KEY_CLEAR CALL CK_KEY JNZ GETKEY2 JMP GETKEY KEY_CLEAR: CALL CK_KEY JNZ GETKEY2 MOV KBD_STATUS,0 CMP FILE_CURRENT,TRUE JZ GETKEY CALL DISP_FILE JMP GETKEY GETKEY2: XOR AH,AH ;Wait for next keyboard input. INT 16H XCHG AH,AL CMP AL,ESC_SCAN STC JZ GETKEY_END CLC GETKEY_END: RET CK_KEY: MOV AH,1 ;Is there a keystroke available. INT 16H RET CLEAR_IT: XOR AH,AH INT 16H ;Read keystrokes until buffer CLEAR_KEY: CALL CK_KEY ; empty. JNZ CLEAR_IT RET ;----------------------------------------------; WRITE_TTY: MOV AH,0EH INT 10H RET ;----------------------------------------------; PRINT_STRING: MOV AH,9 ;Print string via DOS. INT 21H RET ;----------------------------------------------; OLD9 DW ?,? INSTALL_9: PUSH ES MOV AX,3509H ;INT 9 INT 21H MOV OLD9[0],BX MOV OLD9[2],ES MOV DX,OFFSET INT_9 ;Install new interrupt. MOV AX,2509H INT 21H POP ES RET ;----------------------------------------------; UNINSTALL_9: PUSH DS MOV DX,OLD9[0] ;Restore old INT 9. MOV DS,OLD9[2] MOV AX,2509H INT 21H POP DS RET ;----------------------------------------------; INSTALL_24: MOV DX,OFFSET INT_24 ;Install new interrupt. MOV AX,2524H INT 21H RET EVEN STACK_POINTER = $ + 256 _TEXT ENDS END START