    AST RESEARCH, INC.         TECHNICAL BULLETIN #0732                  11-04-91

             AST PREMIUM II WITH 387SX MATH CO-PROCESSOR AND WINDOWS 3.0

    PROBLEM:       Running Windows 3.0 in Standard mode with a 80387SX math co-
                   processor installed may cause the system to hang and display
                   the error message:

                      "Not ready error drive C:, abort, retry, ignore, fail?"

    AFFECTED
    SYSTEMS:       Systems with the following motherboards installed:

                      AST
                   PART NUMBER        DESCRIPTION         LOCATION

                   202356-00X     CUPID Motherboard         U85
                   202360-00X     CLEM Motherboard          U29
                   202373-00X     MS CLEM Motherboard       U22

    CAUSE:         When a Texas Instruments or I.M.P. 82C206 Interrupt Controller
                   is used on the above motherboards, the INTR signal is left
                   set, causing the system to hang.  This failure is only noticed
                   when running Windows version 3.0 in the Standard mode with an
                   80387SX math co-processor installed.

    SOLUTION:      Customers experiencing this failure should have their system
                   motherboard returned to AST for replacement of the 82C206 IC
                   (AST part number 106000-619).

                   NOTE:  The repair/replacement order for the motherboard
                          obtained from AST must specify that the disqualified
                          component at location U?? be replaced.