Fully tested, original Apple Display Card 4•8 12" NuBus video card.
It is not compatible with the Centris/Quadra 660AV but can be used in any other Macintosh with NuBus slots. The 4•8 is an unaccelerated card supporting standard Mac resolutions from 512 x 384 to 1024 x 768 with 8-bit colour (256) and 1152 x 870 with 4-bit colour (16). The Macintosh Portrait Display is supported in 8-bit (256) grayscale and the Two-Page Display is supported in 4-bit (16) grayscale.
The 4•8 video card does not support resolution switching on the fly and requires a video adapter to support different resolutions on a multiscan display.
This card can be upgraded to the same specs as the Display Card 8•24 by the addition of two 256 KB VRAM SIMMs to the SIMM slots on the card.
It requires System 6.0.5 or newer and 32-bit QuickDraw or the 32-bit QuickDraw Patch File.
The rear plate may have some corrosion but the board is fully functional