From: Nicolas Welte (no_spam_at_x1541.de)
Date: 2004-08-20 10:11:09
Marko Mäkelä wrote: > The cartridge could do its own address decoding instead of relying on -ROML > or -ROMH, but I can't see how it can be activated in the address space without > asserting either -GAME or -EXROM. One way to avoid the automatic switch to > 64 mode would be to wait long enough after power-up before asserting -GAME > and thus switching to the UltiMax configuration on the C64. I think it's as easy as asserting EXROM only in the $8000-$9fff area, because then the C128 MMU will never see the line active, because it's an access in the $d5xx area. The Retro Replay works the same way, I guess. It's also invisible on the C128, and only starts if you go to C64 mode. Nicolas Message was sent through the cbm-hackers mailing list
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