Vig550B Motherboard Manual – Ver 1.0
9
Accelerated Graphics Port (AGP)
The Vig550B features both integrated graphics and an AGP port. When using the
integrated graphics then a dynamic portion of the main system memory is used as
video memory. There is an optional GPA (Graphics Performance Accelerator)
modules which has a dedicated 4MB of video memory. You can also use any AGP
video card, with 4x/8x AGP performance.
The Accelerated Graphics Port (AGP) is a high-performance interconnects for
graphic-intensive applications, such as 3D applications. AGP is independent of the
PCI bus and is intended for exclusive use with graphical-display devices. AGP
overcomes certain limitations of the PCI bus related to handling a large amount of
graphics data with the following performance features:
•
Pipelined-memory read and write operations that hide memory access
latency.
•
Demultiplexing of address and data on the bus for near 100 percent bus
efficiency.
•
AC timing for 133 MHz data transfer rates, allowing data throughput of 500
MB/sec.
RJ-45 LAN Connector LEDs
Two LEDs are built into the RJ-45 LAN connector. The following table describes the
LED states when the board is powered up and the LAN subsystem is operating.
Table 1: LAN LED Status
LED Colour
LED State
Condition
Green
Off
10 Mbit/sec data rate is selected.
Green
On
100 Mbit/sec date rate is selected.
Yellow
Off
LAN link is not established.
Yellow
On (steady state)
LAN link is established.
Yellow
On (brighter and pulsing)
The computer is communicating with another computer on
the LAN.
Universal Serial Bus (USB)
The Vig550B Motherboard has four USB ports; one USB peripheral can be
connected to each port. For more than four USB devices, an external hub can be
connected to either port. The motherboard fully supports the universal host
controller interface (UHCI) and uses UHCI-compatible software drivers.
USB features include:
•
Self-identifying peripherals that can be plugged in while the computer is
running.
•
Automatic mapping of function to driver and configuration.
•
Supports isochronous and asynchronous transfer types over the same set of
wires.
•
Supports up to
127
physical devices.
•
Guaranteed bandwidth and low latencies appropriate for telephony, audio,
and other applications.
•
Error-handling and fault-recovery mechanisms built into the protocol.
