On Monday 07 May 2012, you wrote: > Hello! > > This is related to mu ultimate C64 cartridge project ;-) The cartridge > would boot itself in a Ultimax mode, so I would like to clarify some > things about this mode (I don't have a C64 to check...): > > * The computer starts in Ultimax mode due to specific combination of > /GAME and /EXROM lines. If the cartridge later changes these lines, will > the computer go out of Ultimax mode, or stay there forever? it will change immediatly, the respective lines are directly connected to the PLA of the c64. > * Are the /ROML and /ROMH lines active on writes (so that we could put > RAM there and write to it), or only on reads? no, only on reads (except in ultimax mode). typically a cartridge that wants to map ram to these areas will reconstruct the CS signal from the adresslines and r/w. > * How to start VICE in Ultimax mode? ;-)) by attaching a cartridge image (crt file) that is configured for it. Message was sent through the cbm-hackers mailing listReceived on 2012-05-07 17:00:47
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