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    AST RESEARCH, INC.            TECHNICAL BULLETIN # 0951                7-12-94

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                           POWERSTATION AND NEC EPP SCSI CD-ROM

    PROBLEM:        The PowerStation and the NEC EPP SCSI Interface (NEC Model
                    CD-EPPSCS101) fail to recognize the NEC MultiSpin 3X CD-ROM
                    READER (NEC Model CDR-600) connected to the parallel port.
                    Upon boot-up, the device is not recognized and returns the
                    following error message:

                           "No SCSI host adapters detected.
                            Driver load aborted...
                            Press [return]_"

    CAUSE:          When the NEC software is loaded on the PowerExec or the
                    PowerStation, the default configuration is installed.  There is
                    an incompatibility between this default configuration and
                    the parallel port on the PowerStation.

    SYSTEMS
    AFFECTED:       All PowerStations (P/N 500982-XXX) using a NEC EPP SCSI
                    Interface to connect to a NEC MultiSpin CD-ROM via the
                    parallel port.

    SOLUTION:       The software switches /I7 and /M64 must be added to the device
                    statement that contains  the MA358.SYS driver.  The statement
                    should be as follows:

                            DEVICE=C:\SCSI\CDROM\MA358.SYS /I7 /M64

                    This selects IRQ 7 (/I7) and forces the device into Non-Epp
                    Unidirectional (/M64) mode.  For more information on these
                    switches contact NEC's technical support at 1-800-NEC-INFO or
                    consult the NEC user's manual.

    CAUTION:        In no case will AST Research, Inc. be liable for damage to the
                    system or loss of data caused by improper or faulty
                    installation of this drive.