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From: darrylo@hpnmdla.HP.COM (Darryl Okahata)
Newsgroups: comp.sys.ibm.pc.hardware
Subject: Sources for 386 motherboards?
Message-ID: <11300001@hpnmdla.HP.COM>
Date: 9 Sep 90 18:44:50 GMT
Organization: HP Network Measurements Div, Santa Rosa, CA
Lines: 45

Hi,

     I need to replace the 386 motherboard in my lunchbox transportable, and
I'm finding difficultly locating a motherboard that meets my requirements (the
inside of the case is very cramped).  Does anyone know of a 386 motherboard
with the following specifications?

Absolute requirements:

1. Must be an XT-sized motherboard.  An AT-sized motherboard will not fit
   in the case.

2. The 386 should be running at either 20- or 25-MHz (either-or -- not
   both).  A cache is desirable, but not necessary.  Also, the 386 must be
   a 32-bit 386; a 386SX will not do.

3. Must be expandable to at least 16-megabytes of 32-bit RAM (using 16-bit
   RAM is not acceptable).  It is preferred that the memory be on the
   motherboard, although it can be on a special 32-bit RAM card.  It would
   also be nice (but not necessary) if the memory used SIPPs and not SIMMs,
   as I already have SIPPs.

4. Expansion slots #1 (the slot furthest away from the power supply, and
   the one closest to the edge of the motherboard) and #2 must both
   be 16-bit slots, unless slot #1 is a special 32-bit slot for a RAM card,
   in which case slots #2 and #3 must both be 16-bit slots.  Full-length
   16-bit cards must be able to fit into these slots.

5. The expansion bus must run at 8 MHz.  The expansion bus must not be run
   at 10 or 12.5 MHz; it must be run at 8 MHz.

6. The motherboard must be able to run MSDOS and Unix.

7. There must be support for a 387 coprocessor.

Does anyone know of a motherboard that meets these requirements?  Any help will
be appreciated.

     -- Darryl Okahata
	UUCP: {hplabs!, hpcea!, hpfcla!} hpnmd!darrylo
	Internet: darrylo%hpnmd@hp-sde.sde.hp.com

DISCLAIMER: this message is the author's personal opinion and does not
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