email@example.com schrieb: > > > The 6502->8501 design is based on my 6502->6510 design. And the 6510 has a > data-direction register. (Although I wonder if it is used ever again aftre > the first initialisation) AFAIK the 8501 has a DDR as well. So the 6529 <nitpicking> The only way to measure the temperature of the CPU! </nitpicking> As published by Richard Atkinson: set DDR as output set DR as one set DDR as input wait until DR is zero However, because there are no known programs for the +4 which use this feature, it might be abandoned. OTOH, keeping this feature would be cool! (Completely ignoring the fact that common IO Chips do not have such a undocumented feature as the 6510/8501) A.K. Message was sent through the cbm-hackers mailing list
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