AOpen AP57-OV User Manual
Chapter 1
Overview
The AP57 is a high-performance Pentiumī-based system board that utilizes
the PCI/ISA architecture. It integrates the SiS 5571 PCIset, a super I/O
controller, and a PCI mode 4 enhanced IDE controller with bus master
support to enhance system performance. It has four single in-line memory
module (SIMM) sockets that allow system memory expansion up to a
maximum of 256MB. It also supports 256KB and 512KB pipelined-burst
second-level cache.
One main feature of AP57 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 AP57 board measures 220 mm x 250 mm.
1-1
Overview
1.1 Specifications
Form Factor
Board Size
CPU
System Memory
Second-level Cache
Chipset
Expansion Slots
Serial Port
Parallel Port
Floppy Interface
IDE Interface
USB Interface
(optional)
PS/2 Mouse
Keyboard
BIOS
RTC
Battery
Baby AT
220mm x 250mm
Intel Pentium Processor P54C, PP/MT (P55C), AMD
K5 and Cyrix 6x86
FPM (Fast Page Mode) or EDO (Extended Data
Output) 72-pin SIMM x4, maximum 256MB.
256KB or 512KB pipelined-burst cache onboard
SiS 5571 PCIset (480-pin BGA Package)
ISA x3 and PCI x4
Two serial ports UART 16C550 compatible
One parallel port supports standard parallel port
(SPP), enhanced parallel port (EPP) or extended
capabilities port (ECP).
Floppy interface supports 3.5-inch drive with 720KB,
1.44MB or 2.88MB format or
5.25-inch drive with 360KB, 1.2MB format
Dual-channel IDE interface supports a maximum of 4
IDE hard disks or CDROM.
Mode 4 and bus master hard disk drives are also
supported.
USB bracket that supports two USB ports . The
BIOS also supports USB driver to simulate
legacy keyboard.
Via PS/2 mouse bracket
Default: AT compatible keyboard
Mini-DIN PS/2 keyboard connector is optional.
Award Plug-and-Play Flash ROM BIOS
RTC build in chipset
Lithium (CR2032)
1-2
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