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AST RESEARCH, INC.           TECHNICAL BULLETIN # 1023                 10-5-94

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           MANHATTAN SMP ERROR CODE G9 WITH SCO UNIX RELEASE 3.2v4.x


PROBLEM:        When booting SCO UNIX, release 3.2v4.x, on the Manhattan SMP,
                the system hangs at error code G9.  This problem occurs
                intermittently.

CAUSE:          The "G" portion of the failure code is an initialization
                routine and it is defined by SCO as "Initializes the
                Programmable Interrupt Controllers (PIC) chips and
                multiprocessors."

SYSTEMS
AFFECTED:           AST
                PART NUMBER           DESCRIPTION

                520092-XXX      MANHATTAN SMP 486DX/50
                520155-XXX      MANHATTAN SMP PENTIUM/60

SOLUTION:       Because this problem is extremely intermittent, the problem is
                resolved by pressing the reset button to reset the system.
                AST's Technical Support Organization should be contacted for
                troubleshooting assistance if the symptom continues to occur
                after pressing the reset button.