Thanx!
The arcade chip info was only in the wendy carlos interview in keyboard magazine. I sent an email to wendy and somebody from her team said chip sounds off an arcade machine were not made by wendy and they were not used in the actual score but only the fx tracks for the film. The person also stated, "The sounds possible from video game chips would have been anathema to the quality of the music and no consideration was ever given to such use"
Not surprising, given the time period. Most pro musicians I have met (other than electronic musicians) still find electronic generated sounds anathema. (people in the classical and jazz world mostly, fyi)