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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.
NOTE:
Computer systems that have an unshielded cable attached to a USB port
may not meet FCC Class B requirements, even if no device or a low-speed (sub-
channel) USB device is attached to the cable. Use shielded cable that meets the
requirements for high-speed (fully rated) devices.
IDE Support
The motherboard has two independent bus-mastering PCI IDE interfaces. These
interfaces support PIO Mode 3, PIO Mode 4, ATAPI devices (e.g., CD-ROM), Ultra
DMA/33, Ultra DMA/66, Ultra DMA/100 & Ultra DMA/133 synchronous-DMA mode
transfers. The BIOS supports logical block addressing (LBA) and extended cylinder
head sector (ECHS) translation modes. The BIOS automatically detects the IDE
device transfer rate and translation mode.
Programmed I/O operations usually require a substantial amount of processor
bandwidth. However, in multitasking operating systems, the bandwidth freed by bus
mastering IDE can be devoted to other tasks while disk transfers are occurring.
LS-120 Support
LS-120 MB Diskette technology enables you to store 120MB of data on a single, 3.5"
removable diskette.
compatible with 1.44MB and 720KB DOS-formatted diskette and is supported by
Windows 95 and Windows NT operating system.
The Vig556M board allows connection of an LS-120 compatible drive and a standard
3½" floppy drive. The LS-120 drive can be configured as a boot device before a
floppy drive, if selected in the BIOS setup utility.
Note:
If you connect an LS-120 drive to an IDE connector and configure it as the "A" drive
and configure a standard 3.5" floppy as "B" drive, the standard floppy must be
connected to the floppy drive cable's "A" connector (the connector at the end of the
cable).
The BIOS setup utility can be configured to boot firstly from either the LS120 or
standard 3½" floppy drive.
V1.0
LS-120 technology is backward (both read and write)
VIG556M Motherboard Manual
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