12 rep #$30 ; accum/index 16bit
46 yloop ldy #0000 ; column/2 on Y reg
50 sta TMPVAL ; save first pixel X coordinate
51 inc ; increment by 1 for the next pixel
53 asl ; move next pixel value to high nibble
57 ora TMPVAL ; first pixel X -> low nibble
60 stal FB_BASE, x ; write the pixel pair