Chapter 4 Troubleshooting Procedures 35
SIMM Errors
If the operating system, diagnostic program, or POST does not display a SIMM
location (“J” number) as part of the memory error message and the only available
information is a physical memory address, use
TABLE 4-4 to locate the failing SIMM.
FIGURE 4-3 shows the SIMM locations in the system.
Note – The banks listed in TABLE 4-4 do not correspond to the physical order of the
DSIMM slots on the system board. The physical order of the slots is based upon an
alternating bank pattern: bank 0, bank 2, bank 5, bank 3, bank 6, bank 1, bank 7, and
bank 4.
Each bank allows enough address space to accommodate a 64-Mbyte DSIMM. If a
16-Mbyte or 32-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 4-4. TABLE 4-4 lists SIMM slot layout and installation sequence.
TABLE 4-4 SIMM Slots and Physical Address
VSIMM or NVSIMM
Slot Location
DSIMM Slot
Location
Physical Memory
Address Start
Physical Memory
Address End
J0201 (bank 0) 0000 0000(16) 03ff ffff(16)
J0202 (bank 2) 0800 0000(16) 0bff ffff(16)
J0203 (bank 5) 1400 0000(16) 17ff ffff(16)
J0301 (bank 3) 0c00 0000(16) 0fff ffff(16)
J0302 (bank 6) 1800 0000(16) 1bff ffff(16)
J0303 (bank 1) 0400 0000(16) 07ff ffff(16)
VSIMM0, J0407 J0304 (bank 7) 1c00 0000(16) 1fff ffff(16)
VSIMM1 or NVSIMM, J0406 J0305 (bank 4) 1000 0000(16) 13ff ffff(16)
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