[comp.arch] Question for 8255 Guru

is813cs@pyr.gatech.EDU (Cris Simpson) (01/30/89)

 I am having trouble figuring out the INTR abilities of the 8255A.
I understand that the 8255A signals the x86 on the INTR line, then
the x86 asserts INTA, and then reads the 'vector type' from
the data bus.  The question: How does the 8255A set up the byte
representing this 'vector type'?

Yes, I have RTFDataSheet.  No, please don't post responses, I'll
summarize if anyone cares.

Thanks,
cris