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AST RESEARCH, INC. TECHNICAL BULLETIN #0757 06-09-92
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AST PREMIUM 486/33 WITH SQL SERVER
PROBLEM: SQL Server version 4.2 hangs during installation or log-on
while using the system administrators facility (SAF) with a
486DX processor card. This error occurs either in an ISA or
EISA system.
CAUSE: The problem has been isolated to the current version of BIOS.
If CMOS byte 41, bit 4 is high (co-processor disabled), SQL
Administrator will hang.
AFFECTED
SYSTEMS: 486DX/25 or 33 ISA or EISA.
SOLUTION: The following are two solutions available until a new version
of BIOS is released:
1) Using Debug type in the following instructions to determine
the status of the byte 41:
o 70 41 ;point to byte 41
i 71 ;get the byte
Then adjust the value so that bit 4 is low (example: F8h
becomes E8h). Write the new value back to CMOS using the
following instructions:
o 70 41 ;point to the byte
o 71 xx ;xx=new value in hex
2) Temporarily install a 386DX or SX processor board. Boot and
go into setup. Tab down to the field for Enable/Disable
Co-processor. Set to enable. Save and exit. Then,
reinstall the 486 processor board.