2K to 4K RAM Upgrade – An Introduction to ZX/TS Hardware AuthorsRandall GliddenPublicationSYNCPub DetailsSYNC v3 n4Volume: 3 Issue: 4DateJuly/August 1983Pages56-64Read the articleSee all articles from SYNC v3 n4 TagsSYNC 1983 Hardware project TS 1000 ZX81 PeopleRandall Glidden