AOpen AP5T Manuale utente

1-1

Chapter 1

Overview

The AP5T is a high-performance Pentium-based system board that utilizes

the PCI/ISA architecture and Baby AT form factor. It integrates the Intel

82430TX PCIset, a Super I/O controller, and a PCI mode 4 enhanced IDE

controller with bus master and Ultra DMA/33 to enhance system performance.

It has 256KB or 512KB pipelined-burst second-level cache onboard and

support four single in-line memory module (SIMM) plus two Dual in-line

memory module (DIMM) that allow to mix EDO and SDRAM memory and

expansion up to a maximum of 256MB. For the memory and IDE performance,

the Intel 430TX chipset is currently the fastest Pentium chipset in the market.

Another feature that AP5T intends to implement is the new power

management features of Advanced Configuration Power Interface (ACPI).

The most attractive feature of ACPI for desktop user is probably OnNow, an

idea from Notebook. You don't have to go through the entire boot process, into

Win95, and back to your original work. Since ACPI specification is not fully

defined yet. AP5T implements Suspend to Hard Drive by BIOS, from user

point of view, it is the same as OnNow. Note that you have to use VESA

compatible VGA (AOpen S3 PCI PV70/PT70), Sound Blaster compatible

sound card (AOpen AW35/MP56), Rockwell compatible Modem (AOpen

F56/MP56) for Suspend to Hard Drive to work properly.

Note: ACPI is a specification of PC97, it is not

fully defined yet. Although AOpen will try the best

to support ACPI (normally, through BIOS

modifications), it is still possible AP5T can not fully

comply ACPI specification.

Overview

1-2

There are also more features start to be implemented from AP5T revision 3.xx.

Switching Power Regulator, Although Linear Regulator of AP5T revision 2 is

good enough for AMD K6, AP5T revision 3.xx uses switching requlator to

reserve the upgrade capability for new generation CPU.

Over-current Protection, AP5T revision 3.xx implements 3.3V (chipset,

PBSRAM, SDRAM) 10A and CPU core voltage 15A over-current protection to

prevent any accident short circuit and prevent system damage.

CPU Thermal Protection, When CPU temperature is higher than a predefined

value, the CPU speed will automatically slow down and there will be warning

from BIOS and also ADM (AOpen Desktop Manager, similar as Intel LDCM), if

ADM is installed.

FCC DoC certificate

The AP5T has also passed FCC DoC test, this means you can use any kind of

housing with very low EMI radiation.

Overview

1-3

1.1 Specifications

Form Factor Baby AT

Board Size 220 mm x 280 mm

CPU Intel Pentium Processor P54C, PP/MT (P55C), AMD

K5/K6, Cyrix 6x86 and IDT C6.

System Memory FPM (Fast Page Mode) or EDO (Extended Data Output) 72-

pin SIMM x4, and SDRAM 168-pin x2 maximum 256MB.

Second-level Cache 256KB or 512KB pipelined-burst cache onboard

Chipset Intel 82430TX PCIset

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 inches drives with 720KB,

1.44MB or 2.88MB format or 5.25 inches drives with

360KB, 1.2MB format

IDE Interface Dual-channel IDE interface support maximum 4 IDE hard

disks or CDROM, mode 4 , bus master hard disk drives and

Ultra DMA/33 mode hard drives are also supported.

USB Interface Two USB ports supported by USB bracket, the BIOS also

supports USB driver to simulate legacy keyboard.

PS/2 Mouse PS/2 mouse supported by PS/2 mouse bracket.

Keyboard Default AT compatible keyboard, mini-DIN PS/2 keyboard

connector is optional.

RTC and Battery RTC build in Intel PIIX4 chipset, Lithium (CR-2032)

battery.

BIOS AWARD Plug-and-Play Flash ROM BIOS

Suspend to Hard Drive Supported by BIOS, save your work to hard disk and

resume within a very short time. VESA compatible VGA

and Sound Blaster compatible sound card required.

Switching Regulator High efficient switching regulator for future CPU.

Over-current

Protection 3.3V 10A and CPU core voltage 15A over-current

protection to prevent any accident short circuit.

CPU Thermal

Protection Warning when CPU temperature is higher than the

predefined value.

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