ocr: 63 VIC20 Screen & Border Colours Commodore 6545 Video Chip POKE 36879, X: Border POKE 59520, R# POKE 59521, Value Screen BLK WHT RED CYR PUR GRN BLU VEL RO Horizontal totalr number of characters on line (Nht) including BLK 8 9 10 11 12 13 14 15 horizontal retrace. (true value = number + 1) WHT 24 25 26 27 28 29 30 31 R1 Horizontal number of characters displayed (Nhd) RED 40 41 42 43 44 45 46 47 R2 Distance (in characters) from leftt to right margin of screen + 1 CYN 56 57 58 59 60 61 62 63 R3 Sync width. Lo nybble is vertical sync width (in lines) PUR 72 73 74 75 76 77 78 79 Hir nybblei is hor ...
