AOpen AP53-OV User Manual
Chapter 1
Overview
The AP53 is a high-performance Pentiumī-based system board that utilizes
the PCI/ISA architecture. It integrates the Intel 430HX PCIset, a super I/O
controller, a PCI mode 4 enhanced IDE controller with bus master support and
a 256-KB pipelined-burst cache to enhance system performance. It also has
four single in-line memory module (SIMM) sockets that allow memory
expansion up to a maximum of 512 MB.
One main feature of AP53 is the green power-management function that
extends energy conservation from system components to display monitor. It
complies with the power-saving standards of the U.S. Environmental Protection
Agency (EPA) Energy Star program.
The AP53 board measures 220 mm x 250 mm and may come with or without a
voltage regulator module (VRM). The VRM enables the board to support future
2.5V processors.
1-1
Overview
1.1 Board Layout
1 Power connector 14 Voltage regulator with heatsink
2 SIMM sockets 15 Real-time clock and battery
3 Floppy disk drive connector 16 ISA slots
4 Parallel port connector 17 Keyboard controller
5 Primary IDE connector 18 BIOS
6 Secondary IDE connector 19 Super I/O controller
7 Intel 82439 chip 20 PCI slots
8 Pipelined-burst cache 21 COM1 connector
9 Intel 82371 chip 22 COM2 connector
10 CPU socket 23 PS/2 mouse connector
11 Two-pin fan connector 24 AT-keyboard connector
12 Multifunction connector
13 HDD LED connector
1-2
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