Universal Serial Bus Support; Ide Support - Intel VS440FX Technical Specification

VS440FX Motherboard Technical Product Specification
Integrated dual-channel enhanced IDE interface
Support for up to four IDE devices
PIO Mode 4 transfers at up to 16 MB per second
Integrated 8 x 32-bit buffer for bus master PCI IDE burst transfers
Bus master mode
PCI compliance (refer to Section 5.1)
Enhanced DMA controller supporting up to seven DMA channels
Interrupt controller with PCI-to-ISA interrupt mapping circuitry
A 16-bit counter/timer
SMI interrupt logic and timer with fast on/off mode
NMI circuitry

1.7.4 Universal Serial Bus Support

The motherboard features two optional USB ports. The ports permit the direct connection of two
USB peripherals without an external hub. If more devices are required, an external hub can be
connected to either of the built-in ports. The motherboard fully supports the standard universal
host controller interface (UHCI) and uses standard software drivers that are UHCI-compatible.
Features of the USB include:
Self-identifying, hot pluggable peripherals.
Automatic mapping of function to driver and configuration.
Support for isochronous and asynchronous transfer types over the same set of wires.
Support for up to 127 physical devices.
Support for full speed (12 Mbs) and low speed (1.5 Mbs) USB connections. Full speed
connections require shielded cabling.
Guaranteed bandwidth and low latencies appropriate for telephony, audio, and other
applications.
Error handling and fault recovery mechanisms built into protocol.

1.7.5 IDE Support

The motherboard has two independent bus mastering PCI IDE interfaces that support PIO Mode 3,
PIO Mode 4, and ATAPI (e.g., CD-ROM) devices. The BIOS supports Logical Block Addressing
(LBA) and Extended Cylinder Head Sector (ECHS) translation modes. IDE device transfer rate
and translation mode are automatically detected by the BIOS.
Normally, programmed I/O operations require a substantial amount of processor bandwidth;
however, in true multi-tasking operating systems such as Windows
mastering IDE can be devoted to other tasks while disk transfers are occurring.
14
†
95, the bandwidth freed by bus