2K to 4K RAM Upgrade – An Introduction to ZX/TS Hardware Authors Randall Glidden Publication SYNC Pub Details SYNC v3 n4 Volume: 3 Issue: 4 Date July/August 1983 Pages 56-64 BASIC Terms Read the article See all articles from SYNC v3 n4 Products Media Related Articles Image Gallery Source Code Tags SYNC 1983 Hardware project TS 1000 ZX81 People Randall Glidden