Mia Magnusson wrote: > Well, AFAIK you can't REP more than one instruction. The question is > will the 8088 throw away the result of one CMP when the next one runs > in the REP loop? Or is it possible to break out of the REP loop if CMP > sets the condition codes to "the data differs"? Right. It would probably be necessary to do something like this: loop: CMPSW JNE ... LOOP loop > Maybe the improved board could be an add-on to another Commodore 8-bit > machine. For example the 8296 has faster memory than it actually needs > as it in one 1MHz half cycle does two fetches for the video hardware. > That would mean that with a reprogrammed PLA the CPU could use the > memory at 2MHz :) There is a 6809 card for the 8296 but I think it runs at 1 MHz? Something similar could be done here, but running an 8088 at 1 MHz does not look promising. The 8296 and CBM-II have very different hardware architecture. Regards, Michau. Message was sent through the cbm-hackers mailing listReceived on 2017-10-21 05:00:02
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