38 lines
1.5 KiB
Plaintext
38 lines
1.5 KiB
Plaintext
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=============================================================================
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AST RESEARCH, INC. TECHNICAL BULLETIN #0691 06-19-91
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=============================================================================
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PREMIUM II ILLEGAL CMOS VALUES
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Premium II systems, while running Power On Self Test (POST), may display the
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status of cache memory as "Disabled", but CMOS SETUP displays cache as
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"Enabled". These contrary indications are caused by two bits in CMOS memory
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being set to illegal values. Systems affected are those with version 2.00
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BIOS (part numbers 237826-001 A and 237827-001 A) installed.
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The illegal setting can be verified by entering SETUP and using the PAGE DOWN
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key (instead of using the TAB key) to view the status of "Cache Memory".
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With the illegal values set, this field will show that neither "Enable" or
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"Disable" has actually been selected.
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To insure that the cache feature is properly enabled and functioning, perform
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the following steps:
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1. Enter the SETUP program as described in the Premium II User's Manual.
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2. TAB down to the "Cache Memory" field and use the ARROW keys to choose
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"Disable".
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3. TAB to the next field down, then SHIFT-TAB immediately back to the
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"Cache Memory" field and choose "Enable".
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4. Save the new configuration upon exiting the SETUP program.
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The system will boot and display "TESTING CACHE ......ENABLED" during POST,
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and the cache feature will function normally.
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