VDU Base : $8000 VDU Register 0: $8800 VDU Register 1: $8C00 Initialize: 8800: 00 8C00: 00 Fill data: 8800: 00 8000: 00 00 00 00 00 00 00 00 8800: 01 8000: 01 01 01 01 01 01 01 01 8800: 02 8000: 02 02 02 02 02 02 02 02 8800: 03 8000: 03 03 03 03 03 03 03 03 8800: 00 8C00: FF 8000: 8C 8C 8C 8C 8C 8C 8C 8C Verify 8800: 00 8C00: 00 8000.8007 -> 00 00 00 00 00 00 00 00 8800: 01 8000.8007 -> 01 01 01 01 01 01 01 01 8800: 02 8000.8007 -> 02 02 02 02 02 02 02 02 8800: 03 8000.8007 -> 03 03 03 03 03 03 03 03 8800: 00 8C00: FF 8000.8007 -> 8C 8C 8C 8C 8C 8C 8C 8C