32 lines
1.5 KiB
Plaintext
32 lines
1.5 KiB
Plaintext
=============================================================================
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AST RESEARCH, INC. TECHNICAL BULLETIN #0762 07-01-92
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=============================================================================
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AST 5251/11 ENHANCED AND PC GUARDIAN "VIRUS PREVENTION PLUS"
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PROBLEM: When using the application "Virus Prevention Plus" from PC
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Guardian Security Products, with AST 5251/11 Enhanced
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emulation software, any attempt to unload emulation from
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memory will result in a system lock-up.
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CAUSE: With "Virus Prevention Plus" resident in memory, AST 5251/11
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Enhanced emulation will not unload correctly because its
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software interrupt vectors have been changed by the PC
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Guardian software.
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AFFECTED
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SYSTEMS: AST 5251/11 Enhanced
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SOLUTION: AST EPD Marketing has determined that this problem will not be
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fixed. The AST 5251/11 Enhanced emulation product is working
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as designed. To force emulation to unload after its software
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interrupt vectors have been changed may corrupt the interrupt
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vector chain and cause failures with other DOS applications.
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As a work around, AST recommends either not loading "Virus
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Prevention Plus" when using 5251/11 Enhanced emulation or
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rebooting the system to unload emulation.
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