Chapter 2 Ez-Flex Architecture; Base Board; Cpu Card - American Megatrends EZ-Flex User Manual

Chapter 2
EZ-Flex Architecture
Instead of a conventional motherboard, an AMI EZ-Flex
system has two elements: a Base Board and a CPU Card.

Base Board

The AMI EZ-Flex Base Board has all the features of a high-
performance EISA motherboard except a CPU. The Base
Board includes seven expansion slots (including six EISA
bus master slots). The Base Board has three power
connectors. A total of 128 MB of RAM can reside in the
eight SIMM slots.

CPU Card

The microprocessor, external math coprocessor, BIOS
ROM chips, memory cache, and other ICs are on the CPU
Card. The CPU Card plugs into a 160-pin connector on the
Base Board. The Base Board contains the bulk of the
standard EISA system architecture.
Cache Memory
All memory on the Base Board can be accessed by the EZ-
Flex memory caching subsystem, which uses either write-
through or write-back caching. See the appropriate AMI EZ-
Flex CPU Card User's Guide for details. Memory on EISA
Adapter Cards is not cached by the EZ-Flex external cache,
since memory on the bus cannot be easily handled by the
write-back cache algorithm.
AMI EZ-Flex Base Board User's Guide
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