Path: utzoo!attcan!uunet!bcstec!iftccu!bressler
From: bressler@iftccu.ca.boeing.com (Rick Bressler)
Newsgroups: comp.sys.ibm.pc
Subject: Re: 386 Memory question (simms)
Message-ID: <1470005@iftccu.ca.boeing.com>
Date: 1 Jun 90 18:52:41 GMT
References: <5923@buengc.BU.EDU>
Organization: Boeing Commercial Airplane Group
Lines: 25

I'm guessing that part of the confusion is due to the variety of 
'standard' architectures out there and the multiple ways that they 
can be configured.  For example, my motherboard uses an
AMI bios, and a chips & tech chip set.  It has two banks for simms on the 
board and can take an expansion board with 2 banks that can be independently 
configured for either 1m or 256k simms, allowing a mix of 1m and 256k simms in 
a single computer.  Both banks on each board must be configured the same 
however.  I'd imagine this is because they are controlled by the same memory 
controller.

This allows the following combinations:  (Each bank holds 4 simms and has 
to be filled.  Does this mean that memory is interleaved across simms in 
a single bank, or is the addressing linear?)  

256k simms
----------
1m (bank 0 filled)
2m (bank 0 and 1 filled)

1m simms
--------
4m (bank 0 filled)
8m (bank 0 and 1 filled)

Rick