Epson Apex 386/33 Canadian Product User Manual - Page 61
PEM-3300 Motherboard, Restriction
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2-2 PEM-3300 Motherboard If your motherboard is the PEM-3300, the layout of your board be as pictured on the next page. The PEM-3300 motherboard uses a cache memory subsystem providing a small amount of fast memory (SRAM) and a large amount of slow memory (DRAM). This system is configured to so that all system memory is fast memory - fast enough to complete bus cycles with no wait states. The cache memory provides high performance with no wait states. The cache memory provides high performance with a cost approaching that of DRAM. The motherboard contains a Intel® 80386 processor, a 80387 math coprocessor socket, BIOS chips and expansion slots. The figure on the next page will familiarize you with the layout of the PEM-3300 Cache386 33MHz Mainboard. Restrictions Before installing the PEM-3300, we strongly recommend that you follow the restrictions mentioned below: Access Time: l 27256 EPROM (BIOS) with 150ns access time l 1MbitX9 SIP DRAM with 100ns access time l 256KbitX9 SIP DRAM with 80ns access time l 256KbitX4 DIP DRAM with 100ns access time . 256KbitXl DIP DRAM with 80ns access time l 16Kbit X 4 DIP Cache RAM (SRAM) with 20ns access time l All the SIP RAM modules must have leads 22 Chapter 2: Setting Up Your System