Path: utzoo!utgpu!watserv1!watmath!att!att!tut.cis.ohio-state.edu!zaphod.mps.ohio-state.edu!samsung!noose.ecn.purdue.edu!en.ecn.purdue.edu!eldorado From: eldorado@en.ecn.purdue.edu (David D Jansen) Newsgroups: comp.sys.apple2 Subject: Interrupts and the 6551 Keywords: interrupts, ACIA Message-ID: <1990Nov24.191433.17476@en.ecn.purdue.edu> Date: 24 Nov 90 19:14:33 GMT Organization: Purdue University Engineering Computer Network Lines: 13 I was wondering if anyone knows the bitmap of the ACIA registers of the IIc. The ACIA is the 6551. Also, I am not exactly sure how to set up interrupt vectors (IRQ). I used the MLI to set up a vector in the interrupt table but I don't think the jump is being made. Do you have to enable interrupts. I used a CLI instruction. Please send all responses to me. Thanks. Dave -- I am not really here. _______________________________________________________________________________ Dave Jansen | INTERNET: eldorado@en.ecn.purdue.edu