Programmable predication logic in command streamer instruction execution is described. An intermediate circuit capacitor connected between the first feed line and the second feed line, wherein the first constant current source that limits a charging current of the intermediate circuit capacitor. The liner support can be made from flexible aluminum material and the chamber liner comprises a ceramic material. The number of sustain pulses that do not produce light is reduced. The IAF includes a family of audio-video digital encoding formats based on public standards.