36 lines
1.5 KiB
Plaintext
36 lines
1.5 KiB
Plaintext
=============================================================================
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AST RESEARCH, INC. TECHNICAL BULLETIN #0726 12-16-91
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=============================================================================
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PREMIUM EXEC, MS-DOS 5.0 DOSSHELL AND TASK SWAPPING
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Problems may occur with the Premium Exec 386SX/20 and 386SX/25 when
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attempting to use the Task Swapping feature under the MS-DOS 5.0 DOSSHELL.
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When attempting to swap between tasks, the computer will beep and continue to
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run without swapping. This problem does not occur when running AST's version
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of MS-DOS 5.0.
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The problem is caused by the MS-DOS 5.0 installation program installing a
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driver for VGA mono operation (vgamono.grb) when an LCD display is sensed.
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The Premium Exec's LCD has been designed to emulate VGA color modes and is
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not completely compatible with the vgamono.grb driver. AST's version of MS-
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DOS 5.0 installation program has been modified to install the VGA color
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driver (vga.grb) that corrects this problem.
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If running MS-DOS 5.0 on a Premium Exec, the problem can be resolved by
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manually installing the vga.grb driver supplied with the MS-DOS Distribution
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Diskettes. Complete each of the steps listed below in order to install this
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driver:
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1. Insert MS-DOS 5.0 Distribution Diskette #1 in drive A:
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2. At the DOS prompt, enter the following command:
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Copy A:VGA.GRB C:\DOS\DOSSHELL.GRB
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3. Hit the ENTER key.
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