Soyo SY-7VCA2 User Manual

level triggered interrupts channel by channel. The integrated DMA

controller supports type F DMA in addition to standard ISA DMA modes.

Compliant with the PCI2.2 specification, the VT83C686B supports

delayed transactions and remote power management so that slower ISA

peripherals do not block the traffic of the PCI bus. Special circuitry is built

in to allow concurrent operation without causing dead lock even in a PCI-

to PCI bridge environment. The chip also includes eight levels

(doublewords) of line buffers from the PCI bus to the ISA bus to further

enhance overall system performance.

The motherboard uses the VT82C686B Super-I/O controller which

features:

Ø Supports 2 serial ports, IR port, parallel port, and floppy disk

controller functions

Ø Two UARTs for Complete Serial Ports



 Even, odd, stick or no parity bit generation and detection



 Programmable baud rate generator



 High speed baud rate (230Kbps, 460Kbps) support



 Independent transmit/receiver FIFOs



 Modem Control



 Plug and play with 96 base IO address and 12 IRQ options

Ø One dedicated IR port



 Third serial port dedicated to IR function



 IR function either through the two complete serial ports or the

third dedicated port



 Infrared-IrDA (HPSIR) and ASK (Amplitude Shift Keyed) IR

Ø Multi-mode parallel port



 Standard mode, ECP and EPP support



 Plug and play with 192 base IO address, 12 IRQ and 4 DMA

options

Ø Floppy Disk Controller



 16bytes of FIFO