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- Path: sparky!uunet!cis.ohio-state.edu!zaphod.mps.ohio-state.edu!rphroy!hobbes!tkacik
- From: tkacik@hobbes.hobbes.cs.gmr.com (Tom Tkacik)
- Newsgroups: comp.sys.3b1
- Subject: Re: Two comb cards in a 3B1
- Message-ID: <88797@rphroy.ph.gmr.com>
- Date: 20 Aug 92 12:10:58 GMT
- Sender: news@rphroy.ph.gmr.com
- Reply-To: tkacik@hobbes.hobbes.cs.gmr.com
- Organization: GM Research Labs
- Lines: 40
- Nntp-Posting-Host: hobbes.cs.gmr.com
-
- In article 608@cpsolv.CPS.COM, rhg@cpsolv.CPS.COM (Richard H. Gumpertz writes:
- > In article <603@cpsolv.CPS.COM> rhg@cpsolv.CPS.COM (Richard H. Gumpertz) writes:
- > }I have been looking at how to install two combo cards (with 2MB of RAM total)
- > }in the same 3B1. My goal is 4 expansion serial ports and 2MB of expansion
- > }memory using just two slots.
- > }
- > }The following is an idea I am thinking about. DO NOT TRY THESE MODIFICATIONS
- > }EXCEPT AT YOUR OWN RISK! THEY ARE COMPLETELY UNVERIFIED AND UNTESTED! At
- > }this point I just want feed back from other hardware gurus as to whether I
- > }got it right and whether there might be an easier way. Note that I have been
- > }looking at loaded boards and some of the traces are a bit hard to follow:
- > }mistakes are quite possible!
- >
- > [...details deleted...]
- >
- > I have seen no response at all to the above posting that I made. Did it get
- > out? Did anybody read it? Does anybody think it would/wouldn't work? Has
- > the technical expertise ALREADY dried up?
-
- I have not seen this message before. Maybe it did not get out.
-
- With some modification to one of the two boards, you should be able to get
- 4 serial ports and 2Meg (not 4Meg) expansion memory. You probably could put
- 1Meg in both boards, or fill one with 1.5Meg and the other with 0.5Meg.
-
- I have not seen a Combo board, so I do not know how different it is from the
- memory boards, but there was a description of how to combine a combo board and
- a 0.5Meg memory board. If you filled one combo board, and treated the other like
- that memory board, I am sure that whatever modifications were required there will
- be similar to the modifications you will need now.
-
- I did not get a chance to see your details, so I cannot comment on those.
- Good luck. We are all awaiting your note of success. :-)
-
-
- Tom Tkacik
- GM Research Labs
- tkacik@hobbes.cs.gmr.com
- tkacik@kyzyl.mi.org
-
-