200 SPARCstation 20 Service Manual • July 1996
FIGURE B-2 DSIMM Memory System
The SPARCstation 20 system may contain one or more 32-Mbyte DSIMMs. The
Solaris 1.1.1 Version B or later software environment for the SPARCstation 20 system
supports up to eight 32-Mbyte DSIMMs or any combination of 16-Mbyte, 32-Mbyte,
and 64-Mbyte DSIMMs.
The Solaris 2.3 software environment requires kernel patch 101318-34 or later to
support certain 32-Mbyte DSIMM configurations. Install patch 101318-34, available
from your local Answer Center, if additional DSIMMs are installed to create one of
the following memory combinations:
â– One 32-Mbyte DSIMM and seven 16-Mbyte or seven 64-Mbyte DSIMMs
â– Two 32-Mbyte DSIMMs and five or more 16-Mbyte or 64-Mbyte DSIMMs
â– Three 32-Mbyte DSIMMs and three or more 16-Mbyte or 64-Mbyte DSIMMs
â– Four 32-Mbyte DSIMMs and one or more 16-Mbyte, 32-Mbyte or 64-Mbyte
DSIMMs
Note – Install the patch before installing the DSIMMs or the operating system will
fail to boot
CONTROL
SMC
ADDR [12]
DATA [144]
SIMM slot (8)
DSIMM
DSIMM
DSIMM
DSIMM
DSIMM
DSIMM
DSIMM
DSIMM
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