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30 lines
1.3 KiB
Plaintext
30 lines
1.3 KiB
Plaintext
=============================================================================
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AST RESEARCH, INC. TECHNICAL BULLETIN #0737 01-23-92
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=============================================================================
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PREMIUM EXEC AND MICROSOFT PS/2 MOUSE
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Problems have been reported with some Microsoft PS/2 Serial and PS/2 Mice
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when attached to the mouse port of AST Premium Exec 386SX-20 and 386SX-25
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systems. The mouse may exhibit either intermittent operation or a failure to
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initialize after executing the mouse driver. This problem does not occur if
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the same mouse is attached to the Premium Exec's serial port.
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The cause of the problem is that some Microsoft Mice release the clock and
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data lines too quickly when the system is first powered on. The problem has
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been resolved on Premium Exec 386SX-20 systems with version 1.05 of the
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Keyboard BIOS and on Premium Exec 386SX/25 systems with version 1.15 System
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BIOS.
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Premium Exec users experiencing this problem should contact an AST Authorized
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Service Center and obtain the following:
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PRODUCT DESCRIPTION PART NUMBER
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Premium Exec 386SX-20 BIOS Upgrade 1.07/1.05 500892-001
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Premium Exec 386SX-25 System BIOS 1.15 237838-005
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