User manual AOPEN AX53-1

[. . . ] Chapter 1 Overview The AX53 is a high-performance Pentium®-based system board that utilizes the PCI/ISA architecture. It has four single in-line memory module (SIMM) sockets that allow memory expansion up to a maximum of 512 MB. [. . . ] It also offers an error checking and correction (ECC) feature that enables the system to detect, as well as correct the DRAM errors. The Intel 82439HX that comes in a unique ball-grid array (BGA) packaging, acts as the memory controller data path and the DRAM data bus buffer. The BGA packaging offers better stability than the regular quad-flat packaging (QFP). The Intel 82371SB operates as the PCI/ISA bridge and IDE controller. 1. 3. 3 BIOS The board supports the AMI basic input-output system (BIOS). The BIOS is a program that performs the power-on self test (POST) upon booting. During POST, this program activates the peripheral devices, tests onboard memory and prepares the system for operation. For more information on AMI BIOS, see Chapter 3. 1. 3. 4 Expansion Slots The board has two ISA, three PCI and one PCI-/ISA-shared slots. The ISA expansion slots are the black parallel bars on the system board. The PCI slots are those with white color and are shorter than the ISA slots. There are rows of golden pins inside each slot that serve as a clutch to secure the contacts of the expansion board. For information on how to install the expansion boards, see Chapter 2. 1-4 Overview 1. 3. 5 DRAM Sockets The system board has four 72-pin SIMM sockets that allow you to expand system memory to a maximum of 512 MB. Chapter 2 tells how to install memory modules and the different memory configurations available. 1. 3. 6 Second-level Cache The AX53 motherboard may come with 256-KB or 512-KB pipelined-burst second-level cache. [. . . ] See Chapter 2 for more details. 1. 3. 10 Keyboard Port The keyboard port allows you to connect any PS/2-compatible keyboard. Chapter 2 tells how to connect a PS/2 keyboard. 1. 3. 11 Mouse Port The board supports a PS/2 mouse port. [. . . ]