Epson Apex 386/33 Canadian Product User Manual - Page 50

Jumpers For Cache and Main Memory Configuration, memory DRAM configurations. Jumpers W2

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Jumpers for Cache and Main Memory Configuration The tables on below indicate the jumper settings required for different SRAM cache configurations. The cache configurations are listed below: 64KB: 64KB cache (with eight 16Kbit X 4 cache SRAM chips and two 16Kbit X 4 tag SRAM chips) 256KB: 256KB cache (with eight 64Kbit X 4 cache SRAM chips and two 64Kbit X 4 tag SRAM chips) Refer to the figure on the next page for more information. The following table lists the jumper settings required for each cache memory configuration listed above. Table 2-4: Cache Memory Configuration Table 2-5 shows the jumper and switch settings for different onboard memory (DRAM) configurations. Jumpers W2, W3 and switch SW1 are located on the mainboard. To select the proper jumper setting for the RAM size that you want, refer to the figures on the following pages. Two banks of main memory are on the PEM-3301 mainboard, BANK 0 and BANK 1. Each bank accommodates the 32-bit wide data bus. BANK 0 must be installed first. Chapter 2: Setting Up Your System 11

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Jumpers for Cache and Main Memory Configuration
The tables on below indicate the jumper settings required for different
SRAM cache configurations.
The cache configurations are listed below:
64KB:
64KB cache (with eight 16Kbit X 4 cache SRAM chips and two
16Kbit X 4 tag SRAM chips)
256KB:
256KB cache (with eight 64Kbit X 4 cache SRAM chips and
two 64Kbit X 4 tag SRAM chips)
Refer to the figure on the next page for more information.
The following table lists the jumper settings required for each cache
memory configuration listed above.
Table 2-4: Cache Memory Configuration
Table 2-5 shows the jumper and switch settings for different onboard
memory (DRAM) configurations. Jumpers W2, W3 and switch SW1
are located on the mainboard.
To select the proper jumper setting for the RAM size that you want,
refer to the figures on the following pages.
Two banks of main memory are on the PEM-3301 mainboard, BANK
0 and BANK 1. Each bank accommodates the 32-bit wide data bus.
BANK 0 must be installed first.
Chapter
2: Setting Up Your System
11