Hello All,

I'm building a generic 8 bit fast bidirectional I/O card for the 8-bit ISA
bus to interface with various circuits including PICs. I would just like to
know if someone could set me straight about how to generate IRQs. Can I
just pulse  the appropriate IRQ pin (i.e. IRQ5 for IRQ 5 )? If so, what are
the max/min lengths for this pulse. Is there some type of acknowledge
procedure, or is that it? Do I need to synchronize this pulse with the ISA
clock or other signals? Do I need to make sure that I don't pulse this at
the same time as another card?

Thanks,
Sean

Sean Breheny,KA3YXM
Electrical Engineering Student