14 rep #$30 ; accum/index 16bit
46 sep #$20 ; accum 8bit @337
49 yloop ldy #0000 ; column/2 on Y reg @33e
62 inc ; increment X, next pixel on low nibble
66 sta TMPVAL ; save first pixel X coordinate
69 dec ; decrement back for high nibble pixel
73 asl ; move next pixel value to high nibble
77 ora TMPVAL ; first pixel X -> low nibble
80 stal FB_BASE, x ; write the pixel pair
90 infloop bra infloop ; @36d