On 22/05/2018 04:57, Jim Brain wrote: > Doing so would mean moving the registers around a lot, since the > GeoRAM uses IO2 for it's registers, and IO1 for RAM. > > Thus, it seems more work than value for a C64 cart (one can argue the > same for every cart that leverages Ultimax mode, and almost none would > work on an Ultimax). > > However, a standalone cart design could easily flip the lines and > happy work. For ultimax you'd want to put georam registers in the correct place by decoding the address lines, instead of using IO2. You could probably add a jumper to the cpld and tweak the logic a bit, but I assume you don't have an ultimax to test on anyway. A cartridge that adds c64 compatibility to the ultimax (with a passthru) would be awesome, but I also think it might be impossible :DReceived on 2018-05-22 12:00:07
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