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From: tga@eleazar.dartmouth.edu (Greg Ames)
Newsgroups: comp.sys.mac
Subject: Re: Low-Cost Macintosh
Message-ID: <19157@dartvax.Dartmouth.EDU>
Date: 6 Feb 90 06:02:16 GMT
References: <126900165@p.cs.uiuc.edu> <43100015@uicsrd.csrd.uiuc.edu> <131232@sun.Eng.Sun.COM>
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In article <131232@sun.Eng.Sun.COM> fiddler@concertina.Sun.COM (Steve Hix) writes:
:In article <43100015@uicsrd.csrd.uiuc.edu>, andrews@uicsrd.csrd.uiuc.edu writes:
:> 
:> A low-cost mac should have two memory SIMM sockets to conserve
:> space and reduce cost.  The machine should ship with two 1-meg
:> SIMMs, resulting in 2 megabytes of memory, plenty for most users.  
:
:Make that 4 sockets, shipping with one 1Mb SIMM in place.

You'd need to put ship the machines with the SIMM's in pairs or groups of
fours, as the 68K has a 16-bit external bus and wnats to access memory in
16-bit wide chunks.  The 030's (and 020's?) with 32 bit busses could use
only 8-bit wide memory, due to thier dynamic bus sizing abilities, but
it's not to efficient.  This is why SIMM's in pluses and SE's must be
upgraded in pairs, but must be changed in four's on II's and SE/30's
          Greg


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