Installation manual

Sun 4300 Address Decoding
The physical address and the byte in error are used to determine a failing SIMM module. Socket
locations are silkscreened on the component side of the CPU and 3U Memory Boards, and on the
solder side of the 9U Memory Board. This section includes examples of errors and charts for the Sun
4300 CPU, 3U Memory Boards and 9U Memory Boards.
Error Examples
CPU Switch In NORM Position
Parity Error detected on byte 0
(Physical address 0x01000000) with PC 0xFFE90048
Parity Error detected on byte 2
The location of the failing SIMM module is U1702.
CPU Switch In DIAG Position
error: at 0x000FFF8, expect 0x5A972C5a, obs 0x5AFE2C5 (looping)
Physical Address: 0x010FFFF8
(3U expansion memory) Expansion board #1 SIMM in Error: U0802
(9U expansion memory) SIMM in Error: U1702
The location of the failing SIMM module is U1702.
Unexpected parity_memory_error at PC 0xffea1d4c.
Memory Error Address Register: 0x000ffffc. Instruction: d2030000.
Memory Error Control Register: 0x00000054.
Physical address: 0x004ffffc.
CPU board SIMM in Error: U1306
error: at addr 0x000ffffc, expect 0x000ffffc, obs0x00000002.(looping)
Physical address: 0x004ffffc.
The location of the failing SIMM module is U1306.
Sun-4300 CPU Board Memory Addressing
ADDRESS (Dec) ADDRESS (Hex) BANK BYTE SOCKET
0-4MB 000000-3fffff 0 0 U1300
0-4MB 000000-3fffff 0 1 U1301
0-4MB 000000-3fffff 0 2 U1302
0-4MB 000000-3fffff 0 3 U1303
4-8MB 000000-7fffff 1 0 U1304
4-8MB 000000-7fffff 1 0 U1305
4-8MB 000000-7fffff 1 1 U1306
Sun4/II: Troubleshooting - CPU - Sun 4300 Address Decoding
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