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From: phils@tekigm2.TEK.COM (Philip E Staub)
Newsgroups: comp.sys.amiga
Subject: Re: flakey memory boards/CHIP contention
Message-ID: <1776@tekigm2.TEK.COM>
Date: Mon, 18-May-87 16:46:24 EDT
Article-I.D.: tekigm2.1776
Posted: Mon May 18 16:46:24 1987
Date-Received: Tue, 19-May-87 06:38:02 EDT
References: <8705110100.AA27374@cogsci.berkeley.edu> <3077@well.UUCP>
Reply-To: phils@tekigm2.UUCP (Philip E Staub)
Organization: Tektronix, Inc., Beaverton, OR.
Lines: 29

In article <3077@well.UUCP> spg@well.UUCP (Stephen P. Grant) writes:
>memory board is malfunctioning in some way.  However, it is more likely
>that the design of the memory is marginal.  Since the expansion connector 
>is DIRECTLY connected to the MC68000, the Amiga is very sensitive 
>to the effects of noise and the expansion spec reccommends that ALL of
>the signal lines be buffered.  The spec further states that the trace
>lengths should be kept as short a possible to reduce capacitive loading.

It's suggestion/comment/question time. Does anyone think it feasible or
desirable to develop an expansion connector plug in board which passes a 
buffered, self-powered (i.e., this board would have it's own power supply or
a connector for an input from an external power supply) version of the 
expansion bus out the other side? 

Yes, yes, I know the standard answer: buy an expansion box. But I can't help
but feel that there have to be people out there who bought (86 pin) bus 
expansion boards, thinking they would "never" have a need for any more 
than one or two plug in boards, then find themselves in a bind if they 
need three or four and can't get enough drive on the bus pins to make all 
the boards work at the same time.

Or maybe there's already such a product. (If so,...........NEVER MIND 8-) ).

Phil
-- 
-------------------------------------------------------------------------------
Phil Staub              tektronix!tekigm!phils    (206) 253-5634
Tektronix, Inc., ISI Engineering
P.O.Box 3500, M/S C1-904, Vancouver, Washington  98668