>>>>> "RDO" == Marcello 'R D O ' Magnifico <email@example.com> writes: BO> Some one has asked me to do a cartridge with 32K of RAM and the C64 BO> Kernal, BASIC ROMs for his MAX machine, on the assumption that, if BO> it works in UMAX mode on the C64 it will work on the MAX machine (I BO> don't have a MAX machine) As long as mapping 32K of RAM in UltiMAX mode isn't a problem, I don't see why. And as you said, it looks like all the necessary signals are there. RDO> I doubt that a single cartridge could replace both high (Kernel) RDO> and low (Basic) ROMs. UltiMAX allows you to map external ROM at $a000 and $e000, effectively replacing the basic and kernal. BO> Can any one think of any pitfalls? eg the Kernal hangs 'cause it BO> can't find a second CIA to intialize or something. Shouldn't think so -- I think the reset routine only writes to $ddxx, but it's been a while since I checked. RDO> An only CIA? Sheesh... Well, if you can find an emulator and can RDO> turn off a CIA, you can easily see if it works. I LOVE emulators RDO> because they're great in doing this sort of things (and more)... RDO> :-) Taking the CIA out of the socket isn't too hard either, but you'll have to ground VA14 and VA15 or you won't have any video. -- ___ . . . . . + . . o _|___|_ + . + . + . . Per Olofsson, konstnär o-o . . . o + MagerValp@cling.gu.se - + + . http://www.cling.gu.se/~cl3polof/ - This message was sent through the cbm-hackers mailing list. To unsubscribe: echo unsubscribe | mail firstname.lastname@example.org.
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