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- Path: sparky!uunet!cs.utexas.edu!tamsun.tamu.edu!rigel.tamu.edu!a0m2504
- From: a0m2504@rigel.tamu.edu (AKITOMO MORITA)
- Newsgroups: comp.sys.apple2
- Subject: 65802 problem
- Date: 22 Jan 1993 10:07 CST
- Organization: Texas A&M University, Academic Computing Services
- Lines: 21
- Distribution: world
- Message-ID: <22JAN199310075283@rigel.tamu.edu>
- NNTP-Posting-Host: rigel.tamu.edu
- Keywords: 65802
- News-Software: VAX/VMS VNEWS 1.41
-
- Is anybody out there having problems using a 65802 inside a //e inplace of the
- 65C02? I'm having trouble using the 65802 and running an old (OLD) Rana Elite
- 5 meg hard drive. I've tried using a 65816 (since there was talk of this
- earlier) but I had the sam problem with it.
-
- The hard drive has a card with ROM and RAM on it. In $C800-CFFF, the banks
- $CC00-CFFF are used for ROM, and the other 1k can select either another ROM or
- up to 7 1k RAM by reading $c0f8-c0ff (when the card is in slot 7). The problem
- is that the demultiplexer is getting the wrong lower three bits and is
- selecting the wrong set of RAM or ROM.
-
- On another note, I noticed that the //e board has four silver(?) contacts on
- the lower left-hand corner. Can I use these to power a logic probe? In other
- words, does anybody know the signals or purpose of these contact?
-
- Thanks ahead of time
-
- Akitomo Morita
- A0M2504@zeus.tamu.edu
-
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-