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Chapter 1
System Overview
The American Megatrends Excalibur PCI (Peripheral Component Interconnect) baby AT-size PCI ISA motherboard
that supports a Pentium® CPU. This motherboard has three PCI Local Bus expansion slots (two can be used for bus
mastering PCI adapter cards) and four ISA expansion slots.
Features
The American Megatrends Excalibur PCI Pentium ISA motherboard has the following features:
•
supports 256 KB of direct-mapped write-back (or write-through) secondary cache memory,
•
supports from 2 to 192 MB of non-interleaved system memory via two to six x 36 single-sided or double-
sided SIMMs on the motherboard,
•
supports fast PCI local bus-resident IDE on the motherboard with support for IDE Mode 0, 1, 2, and 3 with
32-bit read/write, readaheand, and write posting,
•
includes an SMC® FDC37C665 100-pin PQFP Universal Peripheral Controller that supports two National
Semiconductor NS16C550 serial ports, a parallel port with ECP (Extended Capabilities Port) and EPP (Enhanced
Parallel Port) support, and a floppy controller,
•
includes a 128 KB flash EPROM for the system BIOS,
•
has a battery-backed Real Time Clock with 128 bytes of CMOS RAM to store system configuration data,
and
•
has four ISA and three PCI expansion slots, and
6
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