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AST RESEARCH, INC. TECHNICAL BULLETIN #0754 05-20-92
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AST OFFICE ADVANTAGE 386SX/20 AND WINDOWS 3.0
PROBLEM: When using the AST Office Advantage 386SX/20 with a factory
installed copy of Windows 3.0, Windows will not, by default,
run in 386 enhanced mode. By selecting "help" - "about" from
the Program Manager menu, Windows will show that it is
operating in "Standard Mode".
AFFECTED
SYSTEMS: AST Office Advantage 386SX/20
SOLUTION: Enter the system set-up screen by pressing and holding <CTRL>
+ <ALT> + <ESC> as the system boots. Following the
instructions on the set-up screen for moving the highlight
bar, move to the "Shadow BIOS" field and select "Disable".
Save the system configuration and reboot the system. By
disabling Shadow BIOS, an additional 128K of extended RAM will
be available for Windows. This additional extended RAM will
be sufficient to allow Windows 3.0 to operate in 386 Enhanced
Mode without any other modifications. Alternately, adding
additional memory to the system will also allow Windows 3.0 to
run in Enhanced Mode.