Hallo allemaal, The SRC revealed that the unused port A is read to clear the IRQ caused by the ATN line. I can disable IRQ with the instruction SEI. If during the time IRQ that is disabled an ATN shows up, the IRQ-input of the 6502 is negated. Question: if I enable IRQ again with CLI, will this IRQ still be handled? AFAIK the answer is "Yes", but I want a conformation please. ___ / __|__ / / |_/ Groetjes, Ruud \ \__|_\ \___| http://Ruud.C64.org Message was sent through the cbm-hackers mailing list
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