Specifications

40 U4 U13 U22 U31 U40 U49 U58 U67
20 U5 U14 U23 U32 U41 U50 U59 U68
10 U6 U15 U24 U33 U42 U51 U60 U69
08 U7 U16 U25 U34 U43 U52 U61 U70
04 U8 U17 U26 U35 U44 U53 U62 U71
02 U9 U18 U27 U36 U45 U54 U63 U72
01 U10 U19 U28 U37 U46 U55 U64 U73
00 U11 U20 U29 U38 U47 U56 U65 U74
==============================================================================
COMPAQ Portable and COMPAQ PLUS Memory Error Codes
Memory error codes for the COMPAQ Portable and COMPAQ PLUS Personal Computers
will appear in an "XXYY 201" format.
XX - Denotes the beginning address of the error code (or the bank in which the
error occurred)
YY - Denotes the failed bit
Once all corrections have been completed and all boards have been reinstalled
in the system, begin the problem isolation procedure again to verify proper
operation of the CPU/memory subsystem.
Table 5.4-4. COMPAQ Portable and COMPAQ PLUS System Board Memory
==============================================================================
Error Failure Location of
Code Description Failed Chip Required Action
------------------------------------------------------------------------------
(XXYY 201)
------------------------------------------------------------------------------
0000 201 Bank 0, Parity U39 Replace System Board
0001 201 Bank 0, Data Bit 0 U97 or U53 * Replace System Board
0002 201 Bank 0, Data Bit 1 U87 or U53 * Replace System Board
0004 201 Bank 0, Data Bit 2 U80 or U53 * Replace System Board
0008 201 Bank 0, Data Bit 3 U74 or U53 * Replace System Board
0010 201 Bank 0, Data Bit 4 U70 or U45 * Replace System Board
0020 201 Bank 0, Data Bit 5 U63 or U45 * Replace System Board
0040 201 Bank 0, Data Bit 6 U54 or U45 * Replace System Board
0080 201 Bank 0, Data Bit 7 U46 or U45 * Replace System Board