Mini 32K RAM expansion hides in your VIC-20's cartridge port.

[keeys]

Hello all! I'm Keys. I'm new here.

I like to work with hardware and I've been working on tricking out my VIC-20.

If you visit the Denial forums, you may already know that I've built a tiny little 32KB RAM expansion that fits inside the cartridge port.

It's based on Adam Klotblixt's circuit from '95. But, I've added DIP switches to it to select how much RAM is enabled as well as extra logic for a 3K selector. There's also a whole cart Enable switch and a Read-only switch for helping to run copy-protected cartridge images.

I had a few PCBs made and after keeping one for myself, I'm selling the rest on eBay. If anyone is interested, here's the link to the eBay listing: http://www.ebay.com/itm/331629073207

I assemble these myself and have tested each one on my own VIC-20.

I'll be happy to try and answer any questions you might have about it.

Cheers!

Keys

[rbernardo]

I have one of these. I give it a thumbs up!

Thinking of buying another one,

[ZippyZapp]

This looks cool. The cartridge image feature sounds cool. How exactly do you load Cartridge images?

Nice Job!