    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.