Back-up system for data Authors Publication Timex Sinclair User Pub Details Volume: 1 Issue: 1 Date June 1983 Pages 17 Read the article See all articles from Timex Sinclair User n1 Short overview of the ZX-99 RS232C and tape control system. Products Downloadable Media Related Articles Tags Timex Sinclair User, 1983, Hardware review, TS 1000, ZX81, data-assette People No people associated with this content.