Denial

I proudly present this device, which was designed 3 years ago by Sándor Vass, a member of the Hungarian retro computer community.
Freely available at GitHub:
https://github.com/dikdom/VIC-20-RAM-ROM-Expansion
It works great, after PCB modification works well using W27C512, you can choose out of 8 pcs. of 8kB ROMs:

Hey Dr OG,

thanks for the fix. I changed the schematics and board plans this afternoon according to your changes, I will post them on github soon. Probably I will order some PCBs too, to try them out - but don't hold your breath 'till...

Cheers, nice!