Each Chap is a 4-way parallel (RGBA) image computer. This was a SIMD architecture, which was good for imagery and video applications. It processed four image channels in parallel, one for red, one for green, one for blue, and one for the alpha channel (whose inventors have connections to Pixar). Images were stored with 12 bits per color channel (or 48 bits per pixel). The 12-bit data represented an unusual (for today) fixed-point format that ranged from -1.5 to 2.5 using 2 bits for the integer portion, meaning the range from 0 to 1 had 10 bit accuracy.