> ... or in my case, programmable interrupt controller. The 8259. > In order ot properly support ISA devices, I feel the whole ISA DMA and IRQ > system should be implemented. I agree. But using the 8259 for this purpose? In 1988 I had ny reasons NOT to use it. I will study the datasheets again to see why. > However, I dont believe I'd hook NMI up. Why not? It certainly won't harm. And don't fall in the same trap the designers of the CP/M-cart for the C64 did: they didn't "need" NMI and IRQ either. Later they regretted that very much. Groetjes, Ruud http://Ruud.C64.org/ - This message was sent through the cbm-hackers mailing list. To unsubscribe: echo unsubscribe | mail email@example.com.
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