GENERAL FEATURES
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MEMORY SYSTEM
Two banks of DRAMs can be installed on board. So 8 SIMM
modules may be installed on your system and the maximum memory size
is up to 64MB. 256KB, 1MB, 4MB & 16MB DRAM SIMM modules
are supported. The DRAM should be fast-page mode DRAM with
staggered refresh capability.
The memory system provides a flexible memory configuration.
Several combinations of DRAM types are allowed. The DRAM type
and the memory size are automatically detected by the system BIOS.
So, you may easily change the configuration of the system.
The memory controller system supports fast
page mode. The memory is divided into pages with equal size.
Successive memory accesses within the same page need not require wait
state. Furthermore, a burst line fill mode is implemented. In case of a
read miss of cache memory, 16 bytes data will be fetched from main
memory to cache memory. Using page mode operation will speed up the
line fill operation.To enhance the system performance, shadow RAM
mode is supported. In shadow RAM mode, system BIOS and video
BIOS contained in low speed memory such as EPROM and ROM are
copied into DRAM. Improvement is significant because access to
DRAM is mush faster than ROM.
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