Path: utzoo!mnetor!uunet!husc6!tut.cis.ohio-state.edu!mailrus!ames!ucsd!sdcsvax!ucsdhub!ucrmath!hope!jantypas
From: jantypas@hope.UUCP (John Antypas)
Newsgroups: comp.sys.ibm.pc
Subject: PC IO Port bus ?
Message-ID: <166@ucrmath.UUCP>
Date: 25 Mar 88 00:36:35 GMT
Sender: news@ucrmath.UUCP
Reply-To: jantypas@hope.UUCP (John Antypas)
Organization: University of California, Riverside
Lines: 14

A simplistic question.  Would anyone out there know if:

(a) The IBM PC data bus (ie when I do an INP, or OUT port instruction)
    has address decoding already done?  What about latching?

(b) On the PC, I assume the bus is 16 bits wide (data) with a 16 bit 
    address bus?  (My AT manual says it is.)

John Antypas -- Soft21 --21st Century Software:
New Product from FastBuck Enterprises!  New Puzzle -- Rubik's Cling Wrap!
The puzzle you get stuck on! (Along with everything else ... almost)

UUCP: {garp, killer, pyramid, reed, sdcsvax!ucsd!ucrmath}!soft21!jantypas
Internet: jantypas%soft21.UUCP@{eddie.MIT.EDU, UCSD.EDU, uunet.UU.NET}