Commodore VIC20 – 8k/16k ROM Cartridge PCB This cartridge PCB provides 8x 8k or 4x 16k ROMs, each of which can be selected to be in block 1,2,3 or 5 (link selectable). Supports 27C128/256/512, 28C256 If an EPROM larger than a 27C128 is used, multiple images can be selected using the ROM address jumpers The default selection is the lower block in block 3, and the upper block in block 5, and uses the ROM image at the top of the ROM chip. Fits classic Commodore & TFW8b.com VIC20 Cartridge Cases If you need EPROMS you’ll find them here Why not check out Tynemouth Software Blog on using this PCB 8K Mode jumpers A15 A14 A13 27C64 28C64 27C128 27C256 28C256 27C512 0V 0V 0V – – – – – ROM 1 0V 0V 5V – – – – – ROM 2 0V 5V 0V – ROM 1 – – ROM 1 ROM 3 0V 5V 5V – ROM 1 – – ROM 2 ROM 4 5V 0V 0V – – – ROM 1 – ROM 5 5V 0V 5V – – – ROM 2 – ROM 6 5V 5V 0V ROM 1 ROM 1 ROM 1 ROM 3 ROM 3 ROM 7 5V 5V 5V ROM 1 ROM 1 ROM 2 ROM 4 ROM 4 ROM 8 16K Mode Jumpers A15 A14 A13 27C128 27C256 28C256 27C512 0V 0V 16K – – – ROM 1 0V 5V 16K – – ROM 1 ROM 2 5V 0V 16K – ROM 1 – ROM 3 5V 5V 16K ROM 1 ROM 2 ROM 2 ROM 4 Multi-buy discount on any combination cartridge cases & PCBs – Click for more details (Discounts automatically applied at checkout)