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Motherboard Description SY-K7VTA
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buffers and sixteen levels (doublewords) of prefetch buffers are included
for concurrent PCI bus and DRAM/cache accesses. The chip also
supports enhanced PCI bus commands such as Memory-Read-Line,
Memory-Read-Multiple and Memory-Write-Invalid commands to
minimize snoop overhead. In addition, advanced features are supported
such as snoop ahead, snoop filtering, L1/L2 write-back forward to PCI
master, and L1/L2 write-back merged with PCI post write buffers to
minimize PCI master read latency and DRAM utilization. Delay
transaction and read caching mechanisms are also implemented for further
improvement of overall system performance.
Ø VT82C686A
The VT82C686A PSIPC (PCI Super-I/O integrated Peripheral Controller)
is a high integration, high performance, power-efficient, and high
compatibility device that supports AMD and non-AMD based processor to
PCI bus bridge functionality to make a complete Microsoft PC99-
compliant PCI/ISA system In addition to complete ISA extension bus
functionality, the VT82C686A includes standard AMDligent peripheral
controllers:
1) Master mode enhanced IDE controller with dual channel DMA engine
and interlaced dual channel commands. Dedicated FIFO coupled with
scatter and gather master mode operation allows high performance
transfers between PCI and IDE \devices. In addition to standard PIO and
DMA mode operation, the VT82C686A also supports the UltraDMA-33
standard to allow reliable data transfer rates up to 33MB/sec throughput.
The VT82C686A also supports the UltraDMA-66 standard. The IDE
controller is SFF-8038I v1.0 and Microsoft Windows-family compliant.
2) Universal Serial Bus controller that is USB v1.1 and Universal HCI
v1.1 compliant. The VT82C686A includes the root hub with four
function ports with integrated physical layer transceivers. The USB
controller allows hot plug and play and isochronous peripherals to be
inserted into the system with universal driver support. The controller
also implements legacy keyboard and mouse support so that legacy