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AST RESEARCH TECHNICAL BULLETIN TB-0019A 7-16-84
IBM PC ERROR CODES
Below is a list of error codes that may occur during the POST
(Power On Self Test) or when running the IBM Diagnostics. If it
were to occur during the POST, it would appear as a three or four
digit number. If it were to occur during the IBM Diagnostics, it
would appear as "ERROR -- SYSTEM UNIT xxyy", where xx is the
device number and yy is the error code. The most common error
code is 01. For example, the error message "ERROR - SYSTEM UNIT
201" would appear in the IBM Diagnostics if it were to detect a
memory error.
DEVICE ERROR DEVICE NAME
021 POWER SUPPLY
101 SYSTEM UNIT
201 MEMORY
301 KEYBOARD
401 MONOCHROME DISPLAY
501 COLOR/GRAPHICS DISPLAY
601 DISKETTE DRIVE(S)/ADAPTER
701 MATH COPROCESSOR
901 PARALLEL PRINTER ADAPTER
1101 ASYNCHRONOUS COMMUNICATIONS ADAPTER - COM1
1201 ALTERNATE ASYNCHRONOUS COMMUNICATIONS - COM2
1301 GAME CONTROL ADAPTER
1401 IBM MATRIX PRINTER
1501 SYNCHRONOUS DATA LINK CONTROL COMMUNICATIONS
- SDLC
1701 FIXED DISK DRIVE(S)/ADAPTER
1801 EXPANSION UNIT
2001 BINARY SYNCHRONOUS COMMUNICATIONS - BSC
2101 ALTERNATE BINARY SYNCHRONOUS COMMUNICATIONS
- ALT BSC
2201 IBM CLUSTER ADAPTER