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AST RESEARCH, INC. TECHNICAL BULLETIN #0773 08-25-92
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3COM COMPATIBILITY IN AST EISA SYSTEMS
PROBLEM: There is a bus timing problem with 3COM's 3C507 Coax board
previous to modification 11, revision B and on the 3C507 TP
board modification 4, revision B.
CAUSE: When 3COM 3C507 Coax and 3C507 TP network interface cards are
installed in AST EISA based systems, the following symptoms
will occur:
- Intermittent lock ups
- Unreliable performance
- ABEND (NetWare)
- Trap Errors (OS/2)
SYSTEMS
AFFECTED: 386 Tower EISA, 486 Tower EISA, Premium SE, Power Premium, and
486 Desktop EISA.
SOLUTION: The following revisions must be installed to fix the problem:
The 3C507 Coax board must be a modification 11 or higher and
of revision B or higher. This information is located in the
upper right hand column of the board and is displayed as
follows:
ASSY 6750-11 REV B
The 3C507 TP board must be a modification 04 or higher and of
revision B or higher. This information is located in the
upper right hand column of the board and is displayed as
follows:
ASSY 7508-04 REV B
Customers with the above problem should call 3COM's RMA
department for an upgrade at (800) 876-3266.