AST RESEARCH, INC.         TECHNICAL BULLETIN #0825               04-15-93




               PREMMIA SYSTEMS WITH INTERMITTANT CACHE ERRORS


PROBLEM:       The Premmia may hang at random intervals while running
               applications after passing POST.  No error messages are
               generated.  Memory failures occur while running Advanced
               Diagnostics.

CAUSE:         The SRAMS at locations U20-U27 on the cache RAM module (part
               number 202518-001) are "Cypress" brand IC's.  This vendor has
               been disqualified for use on the cache module due to failure
               to meet AST specifications.

AFFECTED
SYSTEMS:       All Premmia Systems.

SOLUTION:      Replace the cache module with one which has SRAMS of a vendor
               other than Cypress, e.g. Motorola.