The MGA video driver was one of the earliest of the AtheOS system, dating back to around 1999/2000.

atheos/sys/drivers/appserver/mga

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Supported:

• Matrox Millennium II
• Matrox Mistique
• Matrox G100
• Matrox G200
• Matrox G400

Other cards probably work too, but need confirmation.

Problematic:

• Matrox G450 / G550 -- slow, as it works partially through VESA

• Matrox Millennium 1 -- Works for some, doesn't work for most. Displays vertical lines with screen corruption. Possibly the hardware differences between revisions are causing problems, or the driver is tripping up on cards with less ram onboard. This card is a good decade old, but there're still many floating around.

There are multiple chipset revisions (three I believe), different cards with 2, 4 and 8mb of ram, and different DAC types (the serial number reflects the clock frequency - Matrox Millenniums range from 175MHz to 220 or 250?).

This post here is interesting.

List below the specifications written on the PCB of cards that are & are not working, along with a description of the problem if there is one, and we'll see if there's a trend:

Not working:
Revision A card with 2mb of vram
IS-Storm R2 (revision 2) chipset
TVP3029-220pce DAC
Gives fixed vertical and horizontal green lines. There is a 'mirror' effect where everything is horizontally shown twice, with a distance apart of about 30pixels.

Working:
List specs here

Unsupported:

• Matrox Parhelia -- Matrox has made binary-driver releases only, with no released specs: supporting may be difficult to impossible. This is a rare card, produced in AGP and even rarer PCI versions.
  • P650 & P750; cut-down versions of the above.

These cards should work in VESA mode from Syllable 0.5.5.

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Resources:

• Matroxusers.com user support group.
• Matrox.com
• Xfree86 driver overview
• Matrox Wikipedia entry
• PCI ID list for Matrox video cards
• Matrox Technical Support Forum (this section would be the best to ask dev questions I think)
• Matrox chips and cards identification, lots of info

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