Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!magnus.acs.ohio-state.edu!csn!ccncsu!longs.LANCE.ColoState.Edu!bc338569
From: bc338569@longs.LANCE.ColoState.Edu (Brian Catlin)
Newsgroups: comp.sys.ibm.pc.hardware
Subject: Expansion bus questions
Message-ID: <14039@ccncsu.ColoState.EDU>
Date: 6 Apr 91 19:26:19 GMT
Sender: news@ccncsu.ColoState.EDU
Reply-To: bc338569@longs.LANCE.ColoState.Edu.UUCP (Brian Catlin)
Distribution: na
Organization: Engineering College, Colorado State U.  Ft. Collins, CO  80523
Lines: 21

Hello everyone!

I have a couple of questions about the expansion slots in an IBM XT.

   a) Are all of the lines wired in parallel between the slots?
  
   b) How can I add more IRQ lines to my computer?  I currently own
      a Tandy 1400 LT which uses a uPD71059C Interrupt control unit
      from NEC.  I know that these can be cascaded but the
      initialization commands must be changed.  Would this be
      possible to do with any kind of software?  Or could I instead
      OR the INT output from this interrupt controller with the
      output of another one?

I would greatly appreciate any and all help anyone could give me.

Thanks,

B. J. Catlin
bc338569@longs.lance.colostate.edu