32 lines
1.3 KiB
Plaintext
32 lines
1.3 KiB
Plaintext
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AST RESEARCH, INC. TECHNICAL BULLETIN #0685 05-24-91
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=============================================================================
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THE SUPER VGA MONITOR WITH AST VGA ADAPTERS
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In January of 1991, the "dot clock" frequency of the AST Super VGA monitor
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(part number 500783-XXX) became 36 megahertz in order to comply with industry
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standards. This is designated by the characters "36MHZ" on the back of the
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monitor.
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This change causes an incompatibility with AST VGA display adapters in
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certain display modes. The symptoms appear when the "Enhanced Text Mode"
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(132 characters by 25 lines or 132 characters by 43 lines) is chosen for the
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display mode. The monitor will display only horizontal scan lines instead of
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readable text.
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The following table describes the revision level of a given VGA display
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adapter required to maintain compatibility with the "36MHz" Super VGA
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adapter.
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Description Part Number Revision Level
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VGA Adapter (8 bit) 202249-005 C or above
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VGA Plus Adapter 202262-003 D or above
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CUPID System Board 202360-001 S or above
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DSX-16 VGA Adapter 20H004-001 X4 or above
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