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From: long@mcntsh.enet.dec.com (Rich Long)
Newsgroups: comp.sys.mac.hardware
Subject: Re: why larger SIMMS in bank B on IIci ?
Message-ID: <4197@ryn.mro4.dec.com>
Date: 24 Mar 91 18:48:23 GMT
Sender: guest@ryn.mro4.dec.com
Organization: Digital Equipment Corporation
Lines: 17


In article <4140@ac.dal.ca>, ireland@ac.dal.ca writes...
>[why should larger SIMMs go in Bank B of a IIci?]

 This is because of the built-in video. Memory for the video RAM comes out of
 Bank A, and this memory is also used for main memory. The CPU contends with
 the video controller for this memory, slowing performance somewhat.
 Therefore, the more memory that can be stuffed in Bank B, the better, since
 it will NOT be subject to this contention. 

 You can minimize the performance hit by either 1) running the built-in video
 at a lower screen depth or 2) using a Nubus video card (which eliminates the
 problem).

Richard C. Long  *  long@mcntsh.enet.dec.com       
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