I've been working through making multicarts using the UBERgrom board, using Tursi's GROMCFG to load things into the Atmel chip.
I'm very clear on how to handle GROM-only cartridges (Tursi: I'm seeing a bug in the GROMCFG you released a few days ago, where viewing slot 6 at base 0 always shows the recovery bootstrap image instead of what I've just loaded in). Very easy, works fine.
What I'm not clear on is how to handle GROM-and-ROM cartridges (in this case, "Return to Pirate's Isle"). I load the GROMs into a base like any other GROM cartridge, and I put the 8k ROM into the 49F040 at 0x0000.
That, of course, doesn't work. I'd have thought that each base would map to an 8k section of the 49F040, but that's not the case.
So how should this work? Would I put the ROM-only multicart selector at the top of the EEPROM, as with a '379-based cartridge? If so, where should I be seeing RPI -- by activating the multicart menu? Which would take precedence in a GROM/ROM cartridge image -- the ROM or the GROM?
I've scanned through scads of forum posts, and obviously others have this working, but I can't seem to find the "aha" post ...
... thanks in advance for any pointers, even if they're the "read THIS, you idiot!" variety ...