🚀 go-pugleaf

David Longley (David@longley.demon.co.uk) wrote:
: In article <3148d4ab.3672227@news.demon.co.uk>
:            mark@markbz.demon.co.uk "M. Rogers." writes:

: > >In article <826745441snz@longley.demon.co.uk>, David Longley
: > ><David@longley.demon.co.uk> writes
: > >>I have a curious problem which I need a definitive technical solution to.
: > >>
: > >>Motherboard:  VL (one slot, est ISA)
: > >>CPU        :  i486-66DX2
: > >>Cache      :  256K
: > >>RAM        :  4 x 80ns + 4 x 100ns parity
: > >>BIOS       :  AMIBIOS 1991
: > >>
: > >>Problem..
: > >>
: > >>Unzipping files produces CRC errors on a number of the contents. The file
: > >>checks out OK on other systems, and the problem disappears when I disable
: > >>both EXTERNAL CACHE and TURBO CACHE in the BIOS.
: > >>
: > >>There are a few other odd problems which seem to have gone with the cache
: > >>disabled.
: > >>
: > The ram speed is probably too slow for a 486.  Try some 70ns simms
: > (borrow whatever) and see if that cures it.
: > 
: > 
: My mistake - the first four are 70ns.
But the other 4 are 100ns, which are too slow for 486 system.

: I tried changing for 4 x 4MB at 70ns, but the cache problem (bad CRCs on unzip)
: remained....
: -- 
: David Longley
Maybe your cache are fake...
or
Maybe there is something wrong with one or more cache chipsets.
Try to borrow 1 or more cache with same speed and
replace your old cache to find out which one or more has/have problem(s).

Douglas