System information

Installing Hardware Options
MicroVAX 3100 Models 88/98 User Information
3-3
Cache Memory
The MicroVAX 3100 Model 88 system has 128 KB of cache on the system board; the
MicroVAX 3100 Model 98 system has 512 KB of on board cache.
System Memory
The MicroVAX 3100 Model 88 and Model 98 Systems have one bank of four Single-In-
Line Memory Modules (SIMMs) with 16 MB each, for a total of 64 MB. The MicroVAX
Model 98 also has the option of being supplied with SIMMs of 32MB each, for a total of
128 MB. There are slots for a second optional bank of memory. The memory options
include adding a second bank of 16 MB SIMMs (196 MB total), a second bank of 32 MB
SIMMs (256 MB total) or a set of 32 MB SIMMs to replace the first bank (256 MB total
for both banks) on the MicroVAX 3100 Model 88. As available, a second SIMM carrier
will increase maximum memory to 512MB.
Memory Configuration Rules
Refer to Figure 3-2 for SIMM Bank Configuration.
• Random-access memory can be added only in four SIMM increments (four per bank).
• There are two banks, J1-J4 and J-5-J8. Always fill at least one bank completely.
• To fill a bank, start at one end of Bank J8-J5 and fill every SIMM socket in the bank.
Each bank MUST be completely filled with like SIMMs, if it is filled at all.
• Do not mix SIMMs within a bank
• Use same SIMM size within a bank.