Chapter 1
Overview
The AP57 is a high-performance Pentium ®-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
1.1Specifications
Form Factor |
Baby AT |
Board Size |
220mm x 250mm |
CPU |
Intel Pentium Processor P54C, PP/MT (P55C), AMD |
|
K5 and Cyrix 6x86 |
System Memory |
FPM (Fast Page Mode) or EDO (Extended Data |
|
Output) 72-pin SIMM x4, maximum 256MB. |
Second-level Cache |
256KB or 512KB pipelined-burst cache onboard |
Chipset |
SiS 5571 PCIset (480-pin BGA Package) |
Expansion Slots |
ISA x3 and PCI x4 |
Serial Port |
Two serial ports UART 16C550 compatible |
Parallel Port |
One parallel port supports standard parallel port |
|
(SPP), enhanced parallel port (EPP) or extended |
|
capabilities port (ECP). |
Floppy Interface |
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 |
IDE Interface |
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 Interface |
USB bracket that supports two USB ports . The |
(optional) |
BIOS also supports USB driver to simulate |
|
legacy keyboard. |
PS/2 Mouse |
Via PS/2 mouse bracket |
Keyboard |
Default: AT compatible keyboard |
|
Mini-DIN PS/2 keyboard connector is optional. |
BIOS |
Award Plug-and-Play Flash ROM BIOS |
RTC |
RTC build in chipset |
Battery |
Lithium (CR2032) |
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