Hi Ruud, > 4) if you program it to give IRQs, you _have to_ tell the 8259 that you > have noticed the IRQ by negating the INTA (INTerrupt Acknowledge) line > twice. This means extra hardware. Advantage: Negating INTA the first time Correct me if I'm wrong, but I think this is not true for a 8259A in 8086-mode (while it is for a 8259 or a 8259A in 8080-mode). Have you thought about using that one? Spiro. - This message was sent through the cbm-hackers mailing list. To unsubscribe: echo unsubscribe | mail cbm-hackers-request@dot.tml.hut.fi.
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