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1991-12-26
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=============================================================================
AST RESEARCH, INC. TECHNICAL BULLETIN #0728 12-26-91
=============================================================================
AST BRAVO 486/25 VIDEO BIOS ERRORS DURING POST
PROBLEM: When using a third party video card as the primary video in an
AST Bravo 486/25, the following error message will be
displayed during POST:
"Cannot shadow video BIOS in shadow ram"
"Press F1 key to continue or CTRL-ALT-ESC to setup"
AFFECTED
SYSTEMS: Bravo 486/25 system board with the following part number:
202385-001
CAUSE: System BIOS Rel 1.10 does not have the option to disable the
shadow BIOS.
SOLUTION: This problem has been resolved with release 1.20 of the system
BIOS. This system BIOS consist of two chips, part number
237801-003 and 237802-003 revision A. Customers experiencing
the above problem should have the system BIOS upgraded.