Service manual

4-8 Sun Ultra 2 Series Service Manual • July 1996
4.5 DSIMM Failure
At times the operating system, diagnostic program, or POST may not display a
DSIMM location (U number) as part of a memory error message. In this situation,
the only available information is a physical memory address and failing byte (or bit).
The following tables list the necessary information to locate a defective 16-, 32-, 64-,
and 128-Mbyte DSIMM.
17 Power On Reset
18 +3.3 -Sense
19 +5.0 -Sense
20 Return
21 Return
22 Interlock
23 Off
24 Temp Sense
TABLE 4-6 DSIMM Physical Memory Addresses (16-Mbyte)
Group Pair Sockets Bank Address Range (Physical Address [30:0])
0 0 U0401/U0501 0 0x0000_0000 to 0x03ff_ffff (first dbl wd)
0 1 U0601/U0701 1 0x0000_0000 to 0x03ff_ffff (second dbl wd)
1 2 U0402/U0502 0 0x2000_0000 to 0x23ff_ffff (first dbl wd)
1 3 U0602/U0702 1 0x2000_0000 to 0x23ff_ffff (second dbl wd)
2 4 U0403/U0503 0 0x4000_0000 to 0x43ff_ffff (first dbl wd)
TABLE 4-5 Power Supply Connector J3206 Pin Assignments (Continued)
Pin Description