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Hacker Chronicles 2
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685.UTIL.ASM
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Assembly Source File
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1989-03-04
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1KB
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52 lines
; assembly language support routines
_DATA segment word public 'DATA'
; str db 9,9,"r=%d,c=%d,color=0x%02X",10,0
_DATA ends
DGROUP group _DATA
; extrn _printf:near
_TEXT segment byte public 'CODE'
assume cs:_TEXT, ds:DGROUP
;void Dot( int color, int pixrow, int pixcol );
public _Dot
_Dot proc ; write a dot on the screen
push bp
mov bp,sp
mov al,[bp+4] ; get color (byte)
mov ah,0Ch ; write pixel
mov dx,[bp+6] ; get row
mov cx,[bp+8] ; get column
int 10h ; call video rom bios
pop bp
ret
_Dot endp
;int GetMode( void );
public _GetMode
_GetMode proc ; get the screen mode
mov ah,0Fh ; get mode function
int 10h ; call video rom bios
xor ah,ah ; clear top byte (low byte has mode)
ret
_GetMode endp
;void SetMode( int newmode );
public _SetMode
_SetMode proc ; set the screen mode
push bp
mov bp,sp
mov al,[bp+4] ; get new mode
xor ah,ah ; set mode function
int 10h ; call video rom bios
pop bp
ret
_SetMode endp
_TEXT ends
end