mos_8502 :verified: 🇨🇦 on nostr

Let's start simple.

A MVC-compliant prototype of an Ultimax mode banked mapper cartridge would have one banked region for the VIC-II, and one banked region for program code. It wouldn't provide extra work RAM or anything fancy, just a proof of concept.

mos_8502 :verified: 🇨🇦 · 3w

So you get your ROM chips. One of them is for code, one is for data. Use the '040 512KB flash chips for shits and giggles. We can start with the same basic design as Magic Desk: a latch to set the bank for program ROM, and then add another latch for video ROM. Those latches set the high bits of the...