AOpen AP57-OV User Manual
The AP57 is a
One main feature of AP57 is the green
The AP57 board measures 220 mm x 250 mm.
220mm x 250mm
Intel Pentium Processor P54C, PP/MT (P55C), AMD
K5 and Cyrix 6x86
FPM (Fast Page Mode) or EDO (Extended Data
256KB or 512KB
SiS 5571 PCIset
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
1.44MB or 2.88MB format or
IDE hard disks or CDROM.
Mode 4 and bus master hard disk drives are also
USB bracket that supports two USB ports . The
BIOS also supports USB driver to simulate
Via PS/2 mouse bracket
Default: AT compatible keyboard
RTC build in chipset
The default is
Provides mainboard power.
Connects to parallel printer.
Primary channel for IDE hard disk or CDROM,
accepts a maximum of two devices.
DRAM module for system main memory.
Secondary channel for IDE hard disk or
CDROM, accepts a maximum of two devices.
SiS 5571 cache/memory controller in BGA
256/512KB secondary level cache. Cache is
used to enhance memory performance.
Accepts Intel Pentium P54C, PP/MT (P55C),
AMD K5, and Cyrix 6x86 CPUs.
Voltage Regulators w/ Heatsink: The regulator is used to supply CPU
Wireless Infrared connector, used as COM2.
Connector for front panel power reset,
suspend switches and power or green LED.
IDE LED connector:
For front panel IDE LED.
CPU fan connector:
Controls keyboard input/output functions.
USB connector (optional):Universal Serial Bus (USB). The USB is a
installation and cascading of USB devices..
Super I/O controller:
two serial ports (COM1/COM2), one parallel
port (printer), and floppy controller.
Serial port 1.
Serial port 2.
PS/2 mouse connector:
Connects to PS/2 mouse bracketorf
from COM1/COM2, the PS/2 mouse signal is
similar as the keyboard and is also controlled by the keyboard controller.