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Assembly Source File | 1998-01-14 | 14.5 KB | 432 lines

; this is ripped off from pd code in RBBS-ASM (was ANSI1-7.ASM) ; has been heavily modified by M. Kimes, who isn't much of an ; asm-programmer. Now works with C in a strange way and supports ; configurable window. It's momma wouldn't know it now (and probably ; would claim it's the type of program she warned it about). ; I reckon it was public domain before, and still is. ; ; int far pascal ansi (char far *str); ; void far pascal setcoords (int topx,int topy,int botx,int boty); ; void far pascal getcoords (int far *topx,int far *topy,int far *botx,int far *boty); ; void far pascal setfastansi (int fast); ; .model large ANSI_PRNT SEGMENT PUBLIC 'CODE' ASSUME CS:ANSI_PRNT PUBLIC ANSI,SETCOORDS,GETCOORDS,SETFASTANSI,GETFASTANSI PUBLIC _atop,_atopy,_atopx,_abot,_aboty,_abotx,_fastansiout VID_PAGE DB 0 ;Active video page _atop LABEL WORD _atopy DB 0 ;top y coord _atopx DB 0 ;top x coord _abot LABEL WORD _aboty DB 17h ;bottom y coord _abotx DB 4Fh ;bottom x coord _fastansiout DB 1 ;fast ansi writes? GETCOORDS PROC FAR ;void pascal far getcoords(int *topx,int *topy, ; int *botx,int *boty); ; get window coordinates (0 based) PUSH BP MOV BP,SP PUSH DS MOV AH,0 MOV AL,_atopx MOV BX,[BP]+18 MOV DS,[BP]+20 MOV [BX],AX MOV AL,_atopy MOV DS,[BP]+16 MOV BX,[BP]+14 MOV [BX],AX MOV AL,_abotx MOV DS,[BP]+12 MOV BX,[BP]+10 MOV [BX],AX MOV AL,_aboty MOV DS,[BP]+8 MOV BX,[BP]+6 MOV [BX],AX POP DS POP BP RET 16 GETCOORDS ENDP SETCOORDS PROC FAR ;void pascal far setcoords(int topx,int topy, ; int botx,int boty); ; set window coordinates (0 based) PUSH BP MOV BP,SP MOV AH,[BP]+12 MOV _atopx,AH MOV AH,[BP]+10 MOV _atopy,AH MOV AH,[BP]+8 MOV _abotx,AH MOV AH,[BP]+6 MOV _aboty,AH POP BP RET 8 SETCOORDS ENDP SETFASTANSI PROC FAR ;void pascal far setfastansi(int fast); ; set fast ansi (0 = off, ffh = BIOS) PUSH BP MOV BP,SP MOV AH,[BP]+6 MOV _fastansiout,AH POP BP RET 2 SETFASTANSI ENDP GETFASTANSI PROC FAR ;int pascal far getfastansi(void); ; get fast ansi setting (0 = off) XOR AX,AX MOV AH,_fastansiout RET GETFASTANSI ENDP ANSI PROC FAR ;int pascal far ansi(char far *str); ; display a string through DOS' ANSI driver, respecting a window PUSH BP ;set up stack frame MOV BP,SP PUSH DS ;save ds MOV AH,15 ;get current video state INT 10H MOV VID_PAGE,BH ;save it MOV BX,[BP]+6 ;get string address MOV DS,[BP]+8 ;set ds PUSH BX ;save original address MOV CX,BX XOR AX,AX ALOOP: CALL DOCHECKPOS MOV AL,[BX] ;set al to char to print CMP AL,10 ;\n? JNZ CHKCR ;no MOV DX,AX MOV AH,2 INT 21H ;display it CALL DOCHECKPOS MOV AL,13 ;and do cr JMP NOEXIT1 CHKCR: CMP AL,13 ;\r? JNZ CHKANSI ;no MOV DX,AX MOV AH,2 INT 21H ;display it CALL DOCHECKPOS MOV AL,10 ;and do lf JMP NOEXIT1 CHKANSI: CMP AL,27 ;escape? JNZ GOON ;no, skip all this... CMP BYTE PTR [BX]+1,'[' ; check for various ansi JNZ GOON ; commands that would screw CMP BYTE PTR [BX]+2,'2' ; up our window JNZ GOON1 ; \x1b[2J CMP BYTE PTR [BX]+3,'J' JNZ GOON2 ADD BX,4 CALL CLEARSCRN JMP SHORT ALOOP GOON1: CMP BYTE PTR [BX]+2,'K' ; \x1b[K JNZ GOON3 ADD BX,3 CALL CLEARLINE JMP SHORT ALOOP GOON3: CMP BYTE PTR [BX]+2,'k' ;\x1b[k JNZ GOON ADD BX,3 CALL CLEAREOL JMP SHORT ALOOP GOON2: CMP BYTE PTR [BX]+3,'j' ;\x1b[2j JNZ GOON ADD BX,4 CALL CLEAREOS JMP ALOOP GOON: CMP AL,0 ;End of string? JNZ NOEXIT1 JMP SHORT EXIT1 NOEXIT1: CMP _fastansiout,0 ;fast ansi writes? JZ BIOSWRITES ;nope INT 29H JMP SHORT SKIPSLOW BIOSWRITES: CMP _fastansiout,255 ;bios writes? JZ SLOWWRITES ;nope PUSH BX PUSH CX MOV BH,VID_PAGE INT 10H POP CX POP BX JMP SHORT SKIPSLOW SLOWWRITES: MOV DX,AX MOV AH,2 INT 21H ;display it SKIPSLOW: INC BX CMP BYTE PTR [BX],0 ;end of string? JZ EXIT1 ;yep CMP BX,CX ;string too long? JZ EXIT1 ;yep, it wrapped; avoid crash JMP ALOOP ;nope EXIT1: ;wrap it up... CALL DOCHECKPOS POP AX ;retrieve old start pos SUB BX,AX ;subtract from current pos MOV AX,BX ;return length of string printed POP DS POP BP RET 4 ANSI ENDP DOCHECKPOS: ;check cursor pos, protect window PUSH AX ;Save the registers that will be affected PUSH BX PUSH CX PUSH DX CALL WHERE_ARE_WE ; where the cursor is....... CHECKTOPX: CMP DL,_atopx JGE CHECKBOTX MOV AH,2 MOV DL,_atopx MOV BH,VID_PAGE INT 10H JMP SHORT CHECKTOPY CHECKBOTX: CMP DL,_abotx JLE CHECKTOPY MOV DL,_atopx INC DH MOV AH,2 MOV BH,VID_PAGE INT 10H CHECKTOPY: CMP DH,_atopy JGE CHECKBOTY MOV AH,2 MOV DH,_atopy MOV BH,VID_PAGE INT 10H JMP SHORT OUTTAHERE CHECKBOTY: CMP DH,_aboty ; Row ??? JLE OUTTAHERE ; Jump if less CALL SCROLLIT ; else scroll, we're too low MOV DH,_aboty ; put cursor back in window MOV BH,VID_PAGE INT 10H OUTTAHERE: POP DX ;Restore registers POP CX POP BX POP AX RET WHERE_ARE_WE: ;Get the current cursor position PUSH AX ;Save the registers PUSH BX PUSH CX MOV AH,03 ;SET UP FOR ROM-BIOS CALL (03H) MOV BH,VID_PAGE ;TO READ THE CURRENT CURSOR POSITION INT 10H ; DH = ROW DL = COLUMN POP CX ;Restore the registers POP BX POP AX RET ;And go back from wence we came SCROLLIT: PUSH AX ;Save the registers that will be affected PUSH BX PUSH CX PUSH DX MOV AH,2 ;Now set cursor position to ???,??? MOV DH,_aboty MOV DL,_atopx MOV BH,VID_PAGE ;attribute INT 10H MOV AH,8 ;Get the current character attribute MOV BH,VID_PAGE INT 10H MOV BH,AH ;Transfer the attribute to BH for next call MOV AH,6 ;Otherwise scroll ??? lines MOV AL,1 ;Only blank line ??? MOV CH,_atopy MOV CL,_atopx MOV DH,_aboty MOV DL,_abotx INT 10H ;And do it....... MOV AH,2 ;Now set cursor position to ???,??? MOV DH,_aboty MOV DL,_atopx MOV BH,VID_PAGE INT 10H POP DX ;Restore the stack like it was POP CX POP BX POP AX RET CLEARSCRN: ;Clear current window PUSH AX ;Save the registers PUSH BX PUSH CX PUSH DX MOV AH,2 ;Now set cursor position to ???,??? MOV DH,_aboty MOV DL,_atopx MOV BH,VID_PAGE ;attribute INT 10H ; MOV AH,8 ;Get the current character attribute ; MOV BH,VID_PAGE ; INT 10H ; MOV BH,AH ;Transfer the attribute to BH for next call MOV BH,7 MOV AH,6 ;Otherwise scroll ??? lines MOV AL,0 ;clear screen MOV CH,_atopy MOV CL,_atopx MOV DH,_aboty MOV DL,_abotx INT 10H ;And do it....... MOV AH,2 ;Now set cursor position to ???,??? MOV DH,_atopy MOV DL,_atopx MOV BH,VID_PAGE INT 10H POP DX ;Restore the stack like it was POP CX POP BX POP AX RET CLEAREOS: ;Clear to end of current window PUSH AX ;Save the registers PUSH BX PUSH CX PUSH DX MOV AH,8 ;Get the current character attribute MOV BH,VID_PAGE INT 10H MOV BH,AH ;Transfer the attribute to BH for next call MOV AH,6 ;Otherwise scroll ??? lines MOV AL,0 ;clear CALL WHERE_ARE_WE PUSH DX ;save it MOV CX,DX MOV DH,_aboty MOV DL,_abotx INT 10H ;And do it....... MOV AH,2 MOV BH,VID_PAGE POP DX INT 10H ;restore position POP DX ;Restore the stack like it was POP CX POP BX POP AX RET CLEARLINE: ;Clear current line PUSH AX ;Save the registers PUSH BX PUSH CX PUSH DX MOV AH,8 ;Get the current character attribute MOV BH,VID_PAGE INT 10H CALL WHERE_ARE_WE PUSH DX ;save it MOV BH,AH ;Transfer the attribute to BH for next call MOV AH,6 ;Otherwise scroll ??? lines MOV AL,0 ; clear line MOV CX,DX MOV CL,_atopx MOV DL,_abotx INT 10H ; And do it....... MOV AH,2 ;Now set cursor position to ???,??? MOV DL,_atopx MOV BH,VID_PAGE INT 10H MOV AH,2 MOV BH,VID_PAGE POP DX INT 10H ;restore position POP DX ;Restore the stack like it was POP CX POP BX POP AX RET CLEAREOL: ;Clear to end of current line PUSH AX ;Save the registers PUSH BX PUSH CX PUSH DX MOV AH,8 ;Get the current character attribute MOV BH,VID_PAGE INT 10H CALL WHERE_ARE_WE PUSH DX ;save it MOV BH,AH ;Transfer the attribute to BH for next call MOV AH,6 ;Otherwise scroll ??? lines MOV AL,0 ;clear line MOV CX,DX MOV DL,_abotx INT 10H ;And do it....... MOV AH,2 MOV BH,VID_PAGE POP DX INT 10H ;restore position POP DX ;Restore the stack like it was POP CX POP BX POP AX RET ANSI_PRNT ENDS END