29 lines
1.2 KiB
Plaintext
29 lines
1.2 KiB
Plaintext
=============================================================================
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AST RESEARCH, INC. TECHNICAL BULLETIN #0764 07-17-92
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=============================================================================
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AST POWER PREMIUM SYSTEMS AND HARDWARE CURSOR IMPLEMENTATION
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PROBLEM: When using the AST Power Premium with Windows 3.X running in
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32K color video modes, such as 640x480x32K, the mouse cursor
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will blink when placed over areas of the Windows desktop that
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are being redrawn.
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CAUSE: The Western Digital 90C31 VGA controller is not specifically
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designed to utilize the hardware cursor in 32K (16 bit) color
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modes. This limitation is not a problem with the Western
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Digital controller, but is caused by the lack of a color
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palette in 32K color mode. In addition, mouse cursor width
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and color availability would be adversely affected.
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AFFECTED
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SYSTEMS: AST Power Premium systems.
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SOLUTION: Due to the limitations outlined above, a hardware cursor is
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not implemented in 32K color mode.
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