Octek HAWK 486, Руководство пользователя

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GENERAL FEATURES
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2-8
MEMORY SYSTEM
Two banks of DRAMs can be installed on motherboard and
256K, 1MB and 4MB DRAM SIMM modules are support. One bank of
DRAM refers to four pieces of SIMM modules. The maximum memory
size is 32MB when using 4MB DRAM for all banks. The DRAM
should be fast-page mode DRAM with CAS# before RAS# refresh
capability.
The memory system supports Burst mode. Successive memory
accesses in 3, 2, 2, 2 DRAM burst cycles. It does not require wait state
and thus CPU can run at full speed.
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
much faster than ROM.