[comp.sys.ibm.pc] Need some help on the 8259A

sam_hr@debet.nhh.no (Heine Rasmussen) (09/25/89)

I am modifying Somebody Elses Code, and have a question:

What happens when you write to port 20h?  I understand you set a
register in the 8259A, but what does the bits in this register mean?

Heine