Hallo allemaal, > Funny thing, and I don't know if anyone else has noticed this, is that > when I used my CP/M cartridge, I would have to try about a billion times > to get it to boot, but once it did boot, it would work for as long as I > cared to use it for (which, to be honest, wasn't ever very long since it > was so dang slow). Just an observation I thought I would throw in there. > :) The times I used I never had problems booting except for the fact that the resetbutton did "not" work. > when the internal bus on the Z80 is in a "float" condition, the address > multiplexorss on the CPM cart are exposed to a voltage that is neither a "1" > nor a "0" This remark I do not understand. There are no multiplexers on the card, only buffers. The Z80 itself is only tri-stated when the 6510 is active. It even is not tristated when the VIC-chip is in command. In this case the buffers are tri-stated. The moment I'll find my own cartridge again, I'll revise my SCH and give an technical explanation with it. Groetjes, Ruud - This message was sent through the cbm-hackers mailing list. To unsubscribe: echo unsubscribe | mail email@example.com.
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