36 SPARCstation 20 Service Manual • July 1996
FIGURE 4-3 System Board SIMM Slot Locations
Note – The order of the banks listed in TABLE 4-4 are not the same as the physical
order of the DSIMM slots on the system board.
TABLE 4-5 shows the physical order of
the slots. A DSIMM must always be installed in J0201 (DSIMM0 slot). The first
VSIMM is always installed in J0304 (DSIMM6 slot). If a second VSIMM is installed in
J0305 (DSIMM7 slot), an Auxiliary Video Board (AVB) must be installed on the
system board. Only one NVSIMM is supported. If used, it is installed in J0305
(DSIMM7 slot).
TABLE 4-5 SIMM Slot Layout and Installation Sequence
VSIMMs and/or NVSIMM Installation Sequence Slot Layout
DSIMM J0201 DSIMM0
DSIMM J0202 DSIMM1
DSIMM J0203 DSIMM2
DSIMM J0301 DSIMM3
DSIMM J0302 DSIMM4
DSIMM J0303 DSIMM5
J0407(VSIMM0) J0304(default) (DSIMM6)
J0406(VSIMM1 or NVSIMM) J0305 (DSIMM7)
J0201 (bank 0)
VSIMM 0, J0407
VSIMM 1, J0406
*J0304 can be used for a VSIMM or DSIMM
**J0305 can be used for a DSIMM, VSIMM, or NVSIM
J0202 (bank 2)
J0203 (bank 5)
J0301 (bank 3)
J0302 (bank 6)
J0303 (bank 1)
J0304* (bank 7)
J0305** (bank 4)
SIMM locations
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