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From: jgb@prism.gatech.EDU (James G. Baker)
Newsgroups: comp.sys.ibm.ps2.hardware
Subject: Re: Microchannel Specs Wanted
Message-ID: <19973@hydra.gatech.EDU>
Date: 20 Jan 91 17:07:10 GMT
References: <1991Jan18.233856.17774@ncsuvx.ncsu.edu> <1991Jan19.023553.23505@d.cs.okstate.edu>
Organization: Georgia Institute of Technology
Lines: 26

In article <1991Jan19.023553.23505@d.cs.okstate.edu> ong@d.cs.okstate.edu (ONG ENG TENG) writes:
>I heard that the number of chips needed to drive the microchannel
>card takes up more than half the full-length card, leaving little space for
>the circuit of whatever the card is originally supposed to do, 
>
>All in all, unless you are a near-million-dollar company/person, forget it!
>Can anyone please change my mind?

MCA is really not that difficult. I have made several cards for my PS/2 model
70.  Unless you have your own surface-mount LSI stuff, don't expect to make
an eithernet card on one of these boards, but you can do a lot with normal
parts.  Start with an MCA card with the address decode on it(Jameco,etc).  But
even in that case, the address decode only is about 1/7 the area. The POS
implementation is not bad either and has great flexibility.

I hope that this group will support more technical questions about the MCA 
specs, rather than only "Can I have 2 hard disks in my m30..."  




-- 
BAKER,JAMES G - Undergraduate Lab Instructor, School of Electrical Engineering
____  _    _    Georgia Institute of Technology, Atlanta Georgia, 30332
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