Rainbow III

Manufacturer: Ingenieur Helfrich
Manu ID num: 2154
card ID: 33
Chipset: Imnos G360 or G364 and some had G365
Ram: 4MB VRAM (20ns)
Bus: Zorro III
Pixel Clock: 110Mhz (G365 was 170Mhz)
Max Res:
1600×1280×16
1600×1280×8
1280×1024×8
1024×768×16
640×480×24

RTG Support
Picasso 96: No
Cybergraphx: Yes (Version 4.2pre7 or above)
EGS: Yes
Card Specific RTG Systen: No

Screenmodes can be user-defined for this card using CGXcMode but apparently for the default installation of screenmodes, the only one which works is 768x576 due to syncing problems of the INMOS Chip. A reset may be needed before chaning screenmodes. If you intend to use this card with Shapeshifter then it will onl work in 8bit modes are the 16 and 24bit modes of this card are not Mac compatible. This card has also been reported not to work correctly if you have a 68060 installed however it does work with the 040 and 030.

Thanks to Michael Dittmar