American Megatrends Super Voyager LPX, Руководство пользователя

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Chapter 1 System Overview
5
Description,
Continued
Cache Memory
The Super Voyager LPX motherboard supports 64 KB or 256 KB of direct
mapped, write-through or write-back L2 external (secondary) cache memory.
Secondary cache
memory size
SRAM Type Maximum System
Memory Cached
64 KB 8 KB x 8 64 MB
256 KB 32 KB x 8 128 MB
The Intel 486DX, 486DX2, 486SX, AMD486, and 487SX CPUs have 8 KB of
internal cache memory. The 486DX4 CPU has 16 KB of internal cache
memory. All system memory can be cached in internal cache memory. The
cache read has zero wait states. Burst mode is supported.
Main System Memory
The Super Voyager LPX motherboard supports up to 128 MB of DRAM system
memory in four SIMMs (Single Inline Memory Modules) mounted directly
on the motherboard.
SIMM Types Supported
The Super Voyager LPX motherboard supports 256 KB x 36, 512 x 36, 1 MB x 36,
2 MB x 36, 4 MB x 36, 8 MB x 36, or 16 MB x 36 fast page mode SIMMs
operating at 70 ns (RAS access time). The SIMMs can be single-sided or
double-sided.
Shadow RAM
The system BIOS ROM memory area at F0000h–FFFFFh and the video BIOS
ROM memory area (C0000h–C7FFFh) are always copied from ROM (Read
Only Memory) to RAM (Random Access Memory). The copying process is
known as shadowing. Shadowing improves system performance because
RAM is faster than ROM. Adaptor ROM (C80000h – EFFFFFh) can be
shadowed via WinBIOS Setup.