Matrox Corona Installation And Hardware Reference page 94

94 Appendix C: Glossary
MGA
Matrox Graphics Architecture. As part of Matrox imaging
boards display section, it allows the Host operating system
to draw into the overlay buffer using the graphics functions
of the Host operating system.
MSPS
Mega Samples per second.
Multi-head mode
A multi-board configuration that uses Matrox boards and/or
MGA Millennium-II boards to create one large desktop on
two, three, or four screens in a vertical, horizontal, or tiled
fashion.
Also known as multi-display.
Overlay frame buffer
The buffer used to annotate the main frame buffer. On
Matrox Corona, portions of the overlay frame buffer that
have a specified color allow the corresponding areas of the
main frame buffer to show through (if keying is enabled).
Note that in single-screen mode, the overlay frame buffer is
also used to display the Host operating system's user
interface.
PCI
Peripheral Component Interconnect. An expansion bus
standard for the '90s.
PCI Primary/Secondary Bus
A high-performance bus that provides a
processor-independent data path between the CPU and
high-speed peripherals.
PLC
Programmable Logic Controller. A device used to automate
monitoring and control of industrial plants. It can be used as
a stand-alone device or in conjunction with data acquisition.