Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!cs.utexas.edu!uunet!mcsun!sunic!ifi!debet!sam_hr From: sam_hr@debet.nhh.no (Heine Rasmussen) Newsgroups: comp.sys.ibm.pc Subject: Need some help on the 8259A Message-ID: <80@debet.nhh.no> Date: 25 Sep 89 15:56:41 GMT Organization: NHH, Bergen, Norway Lines: 6 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