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