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MASM int 10h help

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Join Date: Oct 2007

Posts: 1

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Solved Threads: 0

esquared

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MASM int 10h help

Oct 27th, 2007

hi Pals,
i have a problem with MASM interrpt 10h.
i want to colour s portion of the screen using the 10h interrupt after changinging to the video mode. Please help

 Help with Code Tags 
 Assembly Syntax (Toggle Plain Text) 
.model small
.stack 100h
.386
 
.data
.code
main PROC
 
	    mov  ax,@data
	    mov  ds,ax
 
		mov ah, 0
		mov al, 3h
		int 10h        ;    set  video  mode 80*25
 		mov ah,1
		int 21h
 ;----  code  for colouring the  screen
            mov ax, 0600h
                mov ch, 1           ;   size to  set  colu
		 mov cl, 1
		 mov dh, 24
		mov dl, 78 
		mov bh, 100b
     	int 10h  
 
;-----------------------------------------------
		mov ah ,04ch	    ; exit       interrupt
		int  21h			; call  sys  interrupt
   main ENDP
   END main
.model small
.stack 100h
.386

.data
.code
main PROC

	    mov  ax,@data
	    mov  ds,ax
		
		mov ah, 0
		mov al, 3h
		int 10h        ;    set  video  mode 80*25
 		mov ah,1
		int 21h
 ;----  code  for colouring the  screen
            mov ax, 0600h
                mov ch, 1           ;   size to  set  colu
		 mov cl, 1
		 mov dh, 24
		mov dl, 78 
		mov bh, 100b
     	int 10h  
		 
;-----------------------------------------------
		mov ah ,04ch	    ; exit       interrupt
		int  21h			; call  sys  interrupt
   main ENDP
   END main

Please help;

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Join Date: Oct 2007

Posts: 1,951

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Solved Threads: 214

Duoas

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Re: MASM int 10h help

Oct 27th, 2007

Make sure you are using a good reference when you use interrupts. Also, try to reduce the number of instructions you use.

 Help with Code Tags 
 Assembly Syntax (Toggle Plain Text) 
;set the video mode to CGA 80 x 25, 16-color
mov ax, 0300h
int 10h
 
;wait for a keypress
mov ah, 1
int 21h
 
;clear the screen to a specific character attribute
mov ax, 0600h  ; scroll all lines up == clear screen
mov bh, 07h    ; light gray on black
mov cx, 0      ; upper-left = 0, 0
mov dx, 184Fh  ; lower-right = 24, 79
int 10h
;set the video mode to CGA 80 x 25, 16-color
mov ax, 0300h
int 10h

;wait for a keypress
mov ah, 1
int 21h

;clear the screen to a specific character attribute
mov ax, 0600h  ; scroll all lines up == clear screen
mov bh, 07h    ; light gray on black
mov cx, 0      ; upper-left = 0, 0
mov dx, 184Fh  ; lower-right = 24, 79
int 10h