Epson Apex 386/33 Canadian Product User Manual - Page 70

Jumpers For Cache and Main Memory Configuration, 16Kbit X 4 tag SRAM chips

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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. Jumpers W9 & W10 Cache Memory Configuration 64KB 256KB Table 2- 11: Cache Memory Configuration Table 2-12 shows the jumper and switch settings for different onboard memory (DRAM) configurations. Jumpers W1-6, W7, W8 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-3300 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 31

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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.
Jumpers W9 & W10
Cache Memory Configuration
64KB
256KB
Table 2- 11: Cache Memory Configuration
Table 2-12 shows the jumper and switch settings for different onboard
memory (DRAM) configurations. Jumpers W1-6, W7, W8 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-3300 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
31