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- Path: seagoon.newcastle.edu.au!usenet
- From: "Bruce R. McFarling" <ecbm@cc.newcastle.edu.au>
- Newsgroups: comp.sys.cbm
- Subject: Re: VISCorp purchase (from Re: Adding a 6522 to my c64)
- Date: 18 Apr 1996 04:51:51 GMT
- Organization: Department of Economics, University of Newcastle
- Message-ID: <4l4hp7$66d@seagoon.newcastle.edu.au>
- References: <4ktud1$4jh@madeline.INS.CWRU.Edu> <4kvjat$34g@cc.joensuu.fi>
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- pellikka@cc.joensuu.fi (Jarno Pellikka) wrote:
- >I made (very long time ago) iee488 inteface to my 64. Iused PIA(s) in it
- >but there was strange problem.. cause of Chip select difference ??
- >I didn't got 6522's to work with my device but PIA's did work fine
- >anyway. (I had 256 k of memory and 488 interface in my 64)
- >I'm not sure but if i remember right PIA Number was 6520 or something.
- >My expansion was made so that cia was in cd00 as normal, first PIA
- >CD20, second cd40, and so on. I used it abuot year and i did't had
- >any progran incombatilies cause of it!!!
-
- Oops, almost forgot. Add sockets with select lines that break IO
- addresses $CD00 .. $CDFF into 32 bit wide address spaces, the first for
- the original CIA, then CD20 .. CD3F, CD40 ... CD5F, etc, for seven
- internal upgrade options without all this !@#$%^#@#$%@% problem with
- IO1/IO2 addressing conflicts. 8-)#
-
- "Commodore Dreaming, on a winter's day ...",
-
- Bruce R. McFarling, Newcastle, NSW
- ecbm@cc.newcastle.edu.au
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