palette cacca

grey:   cmp al, '2'     ;scala di grigi
    jne greyInv
    mov palIndex, 0

greyLp: mov     ax, 01010h  ;set della palette
    xor bh, bh      ;bh=0
    mov bl, palIndex    ;DAC address
    mov     dh, palIndex    ;R
    mov     ch, palIndex    ;G
    mov     cl, palIndex    ;B
    int     10h

    inc palIndex
    cmp palIndex, 63
    jne greyLp
    mov ax, 63
    ret