This display adapter is not officially supported.
Have you tried looking in the Drivers section of BeBits? (http://www.bebits.com)
Here's some information from Be, Inc. about display adapter hardware supported by BeOS R5 (From the BeOS Ready List for x86 systems):
GRAPHICS CARDS
The following graphics add-in cards are supported by BeOS:
3D Blaster Banshee
ASUS V3200
ATI All-In-Wonder [Pro], Xpert@Work [Pro/98], Rage 128 Pro (may require free driver from BeBits.com)
Canopus Total3D 128V
Diamond Viper V330, 550, 770, Stealth II G460, and Monster Fusion
Intel Express 3D
Matrox Mystique, Mystique 220, Mystique G200; Millenium G400, Millennium II, Millennium II AGP; Marvel G400-TV, and Productiva G100
Real3D Starfighter
STB Voodoo3 2000, 3000, 3500; Velocity 128 and 440C
GRAPHICS CHIPSETS
The following graphics chipsets, used on many other add-in graphics cards and the built-in graphics on many computer motherboards, are supported by BeOS:
Voodoo3 (2D only)
Banshee (2D only)
ATI 3D Rage II, Pro, Pro Turbo, LT Pro, and Rage 128 Pro
Diamond Monster Fusion (uses Vodoo Banshee chipset)
Intel i740 and i810
Matrox MGA-G100, MGA-G200 and MGA-G400 (PCI or AGP)
NeoMagic 128, 128XD, and 256AV (laptop specific chipsets)
nVidia RIVA 128, TNT, and TNT2 (PCI or AGP)
SiS 5598, 6326, and 620 on-board graphics
S3 Virge, Virge DX, and Virge GX (but not VX or HX)
Trident MVP4
ADDITIONAL INFORMATION:
If your card is VESA compatible, you can run in VESA mode long-term if you can't obtain a compatible video card or driver for your existing card. Please note in VESA mode you cannot make use of hardware acceleration or screen savers.
If you don't have a compatible graphics card, you can run BeOS using the lowest common denominator SuperVGA "safe boot" graphics mode (640 by 480, 8-bit grayscale at worst; you can do better if your graphics card is VESA 2.0-compliant). While this should work for nearly any graphics card, SuperVGA mode is intended to allow you to install and boot BeOS, and use it long enough to download a real graphics driver for your system. It is not a long-term solution, and does not show the capabilities of BeOS.
****************
The only Trident chipset listed is the MVP4. This doesn't mean you can't get your display adapter working under BeOS--somebody may have written--or is in the process of writing--an appropriate driver.
