NeXTdimension

NeXTdimension (ND) was an accelerated 32-bit color board manufactured and sold by NeXT from 1991 that gave the NeXTcube color capabilities with planned Display PostScript support. The NeXTbus, a NuBus-like implementation card was a full size card for the NeXTcube, filling one of four slots, another one being filled with the main board itself. The NeXTdimension featured input and output, RGB output, an  64-bit RISC processor at 33 MHz for Postscript acceleration, 256KB RAM main memory and 4MB  for a resolution of 1120*832 at 24-bit color plus 8-bit alpha channel. An onboard CL550 chip for  video compression was announced, but never shipped. A handful of engineering prototypes for the MJPEG daughterboard exist, but none actually function.

A stripped down Mach kernel was used as the operating system for the card. Due to the supporting processor, 32-bit color on the NeXTdimension was faster than 2-bit greyscale Display PostScript on the NeXTcube. Display PostScript never actually ran on the board so the never did much more than move blocks of color data around. The Motorola 68040 did the crunching and the board, while fast for its time, never lived up to the hype. Since the main board always included the greyscale video logic, each NeXTdimension allowed the simultaneous use of an additional monitor. List price for a NeXTdimension sold as an add-on to the NeXTcube was $US 3,995.