Untitled
Posted by Anonymous on Mon 14th Jan 2013 20:49
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START:
        MOV AH,00h                      ;get into video mode.  00 = Set Video Mode
    MOV AL,13h                      ;13h = 320x240x16
    INT 10h
SET_VSEGMENT:                       ;set up video segment
    MOV AX,0A000h                   ;point ES to VGA segment
    MOV ES,AX
VALUES:                             ;various values used for plotting later on
    MOV CX,15                      ;length of line.  used for REP
%macro get_offset 2             ;%1 = X and %2 = y . calculates the offset location
    MOV AX,%1                       ;copy X location passed to macro to AX
    MOV BX,%2                       ;copy Y location passed to macro to BX
        MOV DI,AX                       ;put X location into DI
    MOV DX,BX                       ;and Y into DX
    SHL BX,8                        ;Y * 2^8.  same as saying Y * 256
    SHL DX,6                        ;Y * 2^8.  same as saying Y * 64
    ADD DX,BX                       ;add the two together
    ADD DI,BX                       ;and add the X location
%endmacro                       ;end macro


; starting Y location.
        MOV BX,0x64
        MOV AL,0
LL2:
        push AX
        push BX
        get_offset AX,BX
        STOSB
        POP BX
        POP AX
        ADD AX,0x02
        ADD AL,0x01
        CMP AL,0x0F
        JNE LL2

        ADD BX,0x01
        CMP BX,0xc8
        JNE LL2

WAIT_FOR_KEY_PRESS:
        MOV AH,0x00
        INT 0x16
REBOOT:
        DB 0xEA
        DW 0x0000
        DW 0xFFFF
times 0200h - 2 - ($ - $$)  db 0
SIGNATURE DW 0xAA55