FIC A360 service manual 4.5.2 VT82C686B Features, Hardware Functional Overview, PCI to ISA Bridge

Hardware Functional Overview

4.5.2VT82C686B Features

The VT82C686B PSIPC (PCI Super-I/O Integrated Peripheral Controller) is a high- integration, high performance, power-efficient, and high compatibility device that supports Intel and non-Intel based processor to PCI bus bridge functionality to make a complete Microsoft PC99-compliant PCI/ISA system.

The VT82C686B functions and capabilities include:

Inter-operable with VIA and other Host-to-PCI Bridges

•Combine with TWISTER for a complete 66 / 100 / 133 MHz Socket 370 or Slot-1 system with integrated 2D / 3D graphics ( S3 Savage 4)

•Inter-operable with Intel or other Host-to-PCI bridges for a complete PC99 compliant PCI / AGP / ISA system

PCI to ISA Bridge

•Integrated ISA Bus Controller with integrated DMA, timer, and interrupt controller

•Integrated Keyboard Controller with PS2 mouse support

•Integrated DS12885-style Real Time Clock with extended 256 byte CMOS RAM and Day/Month Alarm for ACPI

•Integrated USB Controller with root hub and four function ports

•Integrated UltraDMA-33/66 master mode EIDE controller with enhanced PCI bus commands

•PCI-2.2 compliant with delay transaction and remote power management

•Distributed DMA support for ISA legacy DMA across the PCI bus

•Fast reset and Gate A20 operation

•Flash EPROM, 4Mb EPROM and combined BIOS support

•Supports positive and subtractive decoding

UltraDMA-33 / 66 / 100 Master Mode PCI EIDE Controller

•Dual channel master mode PCI supporting four Enhanced IDE devices

•Transfer rate up to 33MB/sec to cover PIO mode 4, multi-word DMA mode 2 drives, and UltraDMA-33 interface

•Support ATAPI compliant devices including DVD devices

•Support PC native and ATA compatibility modes

•Complete software driver support

Integrated Super IO Controller

•Supports 2 serial ports, IR port, parallel port, and floppy disk controller functions

•Two UARTs for Complete Serial Ports

•Infrared-IrDA (HPSIR) and ASK (Amplitude Shift Keyed) IR port multiplexed on COM2

•Multi-mode parallel port

•Floppy Disk Controller

SoundBlaster Pro Hardware and Direct Sound Ready AC97 Digital Audio Controller

•Dual full-duplex Direct Sound channels between system memory and AC97 link

FIC A360 Service Manual 4-7