CHAPTER 2 HARDWARE INSTALLATION
1. Make sure that the SIMM banks are using the same type and equal size
density memory.
2. To operate properly at least two 72-pin SIMM module must be installed in
the same bank or one 168-pin DIMM module must be installed.
3. Look at the table below:
4. Before using SIMM and DIMM modules, look at the chart next page.
5. Each RAS can not exceed 16 pcs of DRAM.
6. It is not recommended to mix 3V SDRAM with 5V EDO/FP, for it may
cause unreliability.
6. If SDRAM and EDO/FPM are mixed in a system, then the configuration is
limited to a miximum of four RAS(two RAS of x4 EDO/FPM and two RAS
of x8 or x16 SDRAM). If only x8 or x16 EDO/FPM and SDRAM devices
are used(i.e. not x4’s), then five RAS can be supported.
7. If you use a 64M DRAM of SDRAM, then Bank0 can not be use.
2.5-3 Memory Population Rule
BANK0 BANK1 BANK2 BANK3
S S/D/N S/D/N S/N
D S/D/N S/D/N N
N S/D/N S/D/N D
S = Single Density D = Double Density N = None
2-16
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