Pci Interface; Vmchannel - Matrox Meteor-II /Digital Installation And Hardware Reference

42 Chapter 5: Hardware reference

PCI interface

Matrox Meteor-II has a 32-bit PCI bus interface, capable of a
peak transfer rate of 132 Mbytes/sec.
The VIA's PCI interface The VIA's PCI interface is 32 bits wide and operates at 33 MHz.
It allows all VIA resources to be accessed through a 128-Mbyte
memory region, mappable anywhere in the 4-Gbyte PCI
address space.
In addition, the PCI interface supports various plane and pixel
transfer modes by using some of the VMChannel logic.
Consequently, VMChannel and PCI transfers cannot be
performed simultaneously.
Read pre-fetch and write posting buffers are integrated to
optimize Host access.

VMChannel

Matrox Meteor-II provides a 32-bit non-bus controller
VMChannel interface for a secondary or additional high-speed
connection between on-board and external devices. On a
backplane system, it runs at 33 MHz for 132 Mbytes/sec peak
transfer rates.
The VMChannel is only available on the PCI form factor of
Matrox Meteor-II /Digital board.
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