Emulating a 6-Bit System on an 8-Bit System
Original Publication Date: 1989-Sep-01
Included in the Prior Art Database: 2005-Jan-28
This disclosure describes a way of making a video system with an 8-bit color palette and digital-to-analog converter (DAC) emulate a 6-bit system. As a reasonable approximation it is assumed that the missing two bits are the low order bits of the 8-bit DAC. Several approxima- tions are discussed and a flexible solution to implement all approximations is described. The logic required to generate the two missing bits requires three threshold comparators.