Software Release Notice for CP18 CPU Microcode

                                          Version 18.80.00

                                         February 23, 1999


          1.0   Release Abstract

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                This is an initial release of CPU microcode for CP18 systems with EPMS
                (Extended Physical Memory Support).


          2.0   Prerequisites and Dependencies

                2.1 Hardware Prerequisites

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                    This microcode is for use with VS 18000 Series CPUs.


          2.2   Software Prerequisites

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                This version of the CP18 Microprogram supports and REQUIRES Operating
                System Release 7.50.00 (or later).  SYSCON version 3.31.00 (for Classic
                PC's) or version B3.31.00 (for industry standard PC's) is required for
                correct SCU support.


          3.0   Restrictions and Special Considerations

                _______________________________________

                This microcode can emulate older CPU types via a SCU software switch.
                If the switch is set to a CPU type older than CP18, the following
                microcode version numbers are reported to the VSOS:  CP16=16.81.80,
                CP14=14.81.80, CP12=12.81.80, CP10=10.81.80, and CP8=08.81.80.


          4.0   Enhancements

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                None.


          5.0   Problems Corrected

                __________________

                None.


          6.0   Known Anomalies

                _______________

                None.


          7.0   Media Contents

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                One MSDOS format 5 1/4 inch DSDD diskette with one file containing the
                CP18 microprogram.  The file identifier is "/scu/0188000.c18".  This
                file occupies 143360 bytes.


          8.0   Installation Instructions

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                From the SCU Maintenance Menu on the SCU, select the Set Console
                Defaults option and set the CPUCODE default to be the new microcode
                version.  Then, select the Install SCU Software function, place the CP18
                microcode diskette in drive A, and hit the Execute key.  The next time
                CPU microcode is loaded, this microcode will be loaded.