🚀 go-pugleaf

In article <Yr8IhBBZHvdxEwEf@wookie.demon.co.uk>
           wookie@wookie.demon.co.uk "John Beardmore" writes:

>
>Among the complicating factors are:
>
> the need for 16 rather than 8 sim holders
>
> non standard motherbaord
>
> non standard metalwork ( AST )
>
> the machine belongs to a client; tactless to carve it up but OK to 
> upgrade it.
>
>
>Do you know of any modern motherbaords that will take 16 off 1 meg 
>simms as well as possibly some 72s at the same time ?  If so, I'd
>certainly think about it.
>

I have a 386DX/25 relegated to a secondary role for the same reason.
It has 16 x 30-pin SIMM sockets currently populated with 16 x 1MB
SIMMS.  This seemed like an advantage when I bought the machine a few
years ago.

I did consider one of the "make-it-486" type upgrades, but not for very
long.  Amongst the cards in the machine are an Adaptec 1542 bus-mastering
SCSI HA and an Allied Telesis AT1500 ethernet card, also DMA bus
mastering.  This is one of the relatively few '386 boards which can
handle DMA transfers properly.

I found a major reason not to upgrade in the Linux Ethernet-HOWTO
discussing PIO vs shared memory vs DMA ethernet card types:

 "And a reason for not using ANY DMA device is using a Cyrix 486
  processor designed for plug-in replacement of a 386: these
  processors must flush their cache with each DMA cycle."

Anyone know if this still applies to the newer generation of upgrade
chips?
Neville
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