It all started out as a mild curiosity in a junk yard...... London 1965... No, where was I? Ah yes, the prologue.
V1 - VIC20 ROM/RAM Cartridge
V2 - VIC20 Penultimate CartridgeWhen I ran out of boards, I revised that design before ordering more. I added more RAM, so it could achieve the maximum, 35K (3K+32K), and more ROM, to support thirty two 8K or 16K cartridges.
V3 - VIC20 Penultimate Cartridge with IEEE-488Then came a bit of a dead end. For V3, I looked at integrating a disk drive, based on an IEEE-488 interface, with a plan to use a variant of my PET microSD.
V4 - VIC20 Penultimate Cartridge with MenuThe next step was to get rid of the DIP switches. You can just make out the prototype was based on the V2 board with a microcontroller added to control the DIP switch inputs.
V5 - VIC20 Penultimate Cartridge production versionWith that now proven, it was time to look at the new VIC20 cartridge cases.
ChinnyVision and the 8 bit guy.
Cheese and Onion, an original game for the VIC20, the first in a commercially produced 32K cartridge.
V6 - VIC20 Penultimate+Now it's time to change things up a bit. Add a larger ROM chip, and there can be more content on the cartridge.
*Note, this is a ROM and RAM cartridge with a selection of games on there to demonstrate the capabilities of the VIC20. These games are all in the public domain. If you like them, you should try to track down original cartridges, although these days the only people who would benefit from that would be the ebay sellers. We will remove any titles from future releases if requested to.
The updated version of the Penultimate Cartridge is now available from The Future Was 8 bit
2023 Update: Now there is the Penultimate +2 Cartridge, available from The Future Was 8 bit
More info in this post: http://blog.tynemouthsoftware.co.uk/2023/06/penultimate-plus-2-cartridge.html