A Trick and a Graphic System Authors Keith Comer Publication SYNC Publication Details Volume: 1 Issue: 3 Date May/June 1981 Pages 30-31 Read the article See all articles from SYNC v1 n3 Products Downloadable Media Related Articles Glitchoidz Report Glitchoidz Report Tags SYNC, 1981, Type-in program, ZX80 People Keith Comer