Service manual

94 Self-Tests
B.8 FP (test 9)
The floating point unit power-up self-test has one longword for status
information in the following format:
FP 0000.000X
where X is one of the status or error codes listed in the following table:
Code Status Definition
1 Status: Success
2 Error: Floating point error
4 Error: Invalid floating point exception
B.9 MEM (test B)
The memory power-up self-test has two or three longwords for status
information in the following format:
MEM 00YY.00XX (if no missing memory)
SSSSSSSS
MEM 00YY.00XX (if some memory is bad)
SSSSSSSS 0000MMMM
where Y is the number of megabytes that are expected to be in the system
(from the CFGTST register), and XX is one of the status or error codes
listed in the following table. The first error code for the MEM indicates
the status of all the main memory system. The second line contains
additional information on the memory system, where SSSSSSSS is the
total number of bytes of good memory found in the system. If this field is
not in an even megabyte value (that is, 00020000), then the second field,
MMMM, will be displayed to indicate the failing megabyte bank. Each bit in
the YYYY status code indicates the status for one bank of memory (bit set
means bad). In some cases, where a parity error was detected, two banks
may indicate a bad bank of memory since the test does the testing on a
nonpage aligned region at the beginning of one page and at the end of the
previous page.