Memory Problem Determination Bits - IBM RS/6000 44P 270 Service Manual

Memory Problem Determination Bits

The following table expands the firmware error code 25Cyyxxx on page 102, where yy
is the PD values in the table below and xxx are the last three digits of the error code.
Use these values to identify the type of memory that generated the error.
If you replace FRUs and the problem is still not corrected, go to "MAP 1540: Minimum
Configuration" on page 50 unless otherwise indicated in the tables.
Table 4. Memory Module PD bits
PD value
28
2A
38
3A
48
4A
58
5A
68
6A
Note: Memory modules must be installed in pairs.
142
Service Guide
Size Clock Cycle (nsecs)
512 MB
512 MB
128 MB
128 MB
64 MB
64 MB
32 MB
32 MB
256 MB
256 MB
Parity/ ECC
10
8
10
8
10
8
10
8
10
8
ECC
ECC
ECC
ECC
ECC
ECC
ECC
ECC
ECC
ECC