Expansion Slots; Dram Sockets; Second-Level Cache; Two-Channel Pci Mode 4 Enhanced Ide Interface - AOpen AP53 User Manual

Overview

1.3.4 Expansion Slots

The board has three ISA and four PCI expansion slots. The ISA expansion
slots are the black parallel bars on the system board. The PCI slots are those
with white color and are shorter than the ISA slots. There are rows of golden
pins inside each slot that serve as a clutch to secure the contacts of the
expansion board. For information on how to install the expansion boards, see
Chapter 2.

1.3.5 DRAM Sockets

The system board has four 72-pin SIMM sockets that allow you to expand
system memory to a maximum of 512 MB. These sockets accept both single-
density and double-density SIMMs. Chapter 2 tells how to install memory
modules and the different memory configurations available.

1.3.6 Second-level Cache

The AP53 motherboard comes with an onboard 256-KB pipelined-burst
second-level cache. This pipelined-burst cache improves system performance
by shortening the DRAM read prefetch time resulting to a faster data transfer
rate.

1.3.7 Two-channel PCI Mode 4 Enhanced IDE Interface

The AP53 board integrates a two-channel PCI mode 4 enhanced integrated
drive electronics (E-IDE) interface that allows the system to support four
E-IDE devices (including hard disks with more than 528-MB capacity) via two
onboard IDE connectors (see section 1.1). This feature offers users increased
data storage capacity.
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