Determining a Failed DSIMM
The operating system, diagnostic program, or POST should display a DSIMM location
(“J” number) as part of the memory error message. Table 3–3 lists the DSIMM
locations and the corresponding physical addresses. If the only available information
is a physical memory address, refer to Table 3–3 to locate the failed DSIMM.
TABLE 3–3 DSIMM Slot Locations and Physical Addresses
DSIMM Slot Location Physical Memory Address Start
Physical
Memory
Address End
J0201 (bank 0) 0000 0000 03ff ffff
J0203 (bank 1) 0400 0000 07ff ffff
J0302 (bank 2) 0800 0000 0bff ffff
J0304 (bank 3) 0c00 0000 0fff ffff
J0202 (bank 4) 1000 0000 13ff ffff
J0301 (bank 5) 1400 0000 17ff ffff
J0303 (bank 6) 1800 0000 1bff ffff
J0305 (bank 7) 1c00 0000 1fff ffff
Note - The physical order of the DSIMM slots on the MLB is not the same as the
order of the banks listed in the table. The physical order of the slots is based on an
alternating bank pattern: bank 0, bank 4, bank 1, bank 5, bank 2, bank 6, bank 3 and
bank 7.
Each bank allows enough address space to accommodate a 64-Mbyte DSIMM. If a
16-Mbyte DSIMM is installed in a bank, the unused addresses are “mapped out” by
the memory management hardware. The physical memory starting address of any
capacity DSIMM installed will always be as listed in Table 3–3.
28
SPARCstation 10 Service Manual ♦ Revision A, July 1993
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