Connectors; Video Memory; Available Video Resolutions - HP Vectra VA6 Technical Reference Manual

3 Interface Boards and Mass-Storage Drives
Matrox MGA Millennium Video Controller Board

Connectors

The Video Electronics Standards Association (VESA) defines a standard
video connector, variously known as the VESA feature connector,
auxiliary connector, or pass-through connector. The video controller
supports an output-only VESA feature connector in VGA mode. This
connector (whose pin names are listed in a table on page 44) is integrated
on the PCI board, and is connected directly to the pixel data bus and the
synchronization signals.
There are two connectors on the back panel: the normal DB15 VGA
connector, for connecting to HP displays, and a Matrox VESA connector.
The layout of the pins for the DB15 VGA connector are shown on page 44.
If you install a VESA-standard video accessory board that uses the MGA
video adapter, connect the accessory board's cable to the VESA pass-
through connector on the board.

Video Memory

The video memory (also known as window RAM, or WRAM) is a local block
of RAM for holding two major data structures: the double buffer (to hold one
frame steady on the screen whilst the next one is being processed), and the
Z-buffer (for storing depth information for each pixel). It is dual ported, so
that it can be inputting and outputting simultaneously.
The Matrox MGA Millennium video board is supplied with 2 MB of video
memory. This can be upgraded to 4 MB with a D3557A upgrade module, or
to 8 MB with an MGA-MIL/MOD6 upgrade module (ordered from Matrox).
The upgrade socket can alternatively be used for the installation of the
Matrox MGA Media XL upgrade module (also ordered from Matrox) to
support MPEG. The switch settings do not have to be changed.

Available Video Resolutions

The number of colors supported is limited by the graphics device and the
video memory. The resolution/color/refresh-rate combination is limited by a
combination of the display driver, the graphics device, and the video
memory. If the resolution/refresh-rate combination is set higher than the
display can support, you risk damaging the display.
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