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 Intel i860 never did much more than move blocks of color data around.
A simplified operating system was used for the card, which relied on a supporting processor to deliver faster 32-bit color performance on the NeXTdimension compared to 2-bit greyscale Display PostScript on the NeXTcube. Notably, Display PostScript never actually ran on the board, limiting the Intel i860's capabilities to basic data relocation.