Path: utzoo!attcan!uunet!ginosko!gem.mps.ohio-state.edu!tut.cis.ohio-state.edu!mailrus!uwm.edu!csd4.csd.uwm.edu!jgreco
From: jgreco@csd4.csd.uwm.edu (Joe Greco)
Newsgroups: comp.sys.cbm
Subject: VIA Add-on to C64?
Message-ID: <284@uwm.edu>
Date: 30 Sep 89 23:26:26 GMT
Sender: news@uwm.edu
Reply-To: jgreco@csd4.csd.uwm.edu (Joe Greco)
Organization: Interstellar Telephone, Telegraph, and Telepath, Inc.
Lines: 20

Hello....

I have been experimenting with a 6522 VIA chip.  I'd like to map one into
the 64's I/O space, but I ran into a little trouble.  It doesn't work....

I have simply connected all CPU-side pins on the VIA to their expansion port
counterparts, except for CS1.  (CS2* is connected to IO1).  It doesn't work,

but if I disconnect CS1 amd put a 6526 CIA in place, it works perfectly
fine.  Does anybody know of any timing problems or other possible causes?

Thanks....

					- Joe

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