ZX81/TS1000 Tips AuthorsDon LamenPublicationThe Data ExpansionPub DetailsThe Data Expansion v5 n7Volume: 5 Issue: 7DateJuly 1988Pages21-22Read the articleSee all articles from The Data Expansion v5 n7 TagsThe Data Expansion TS 1000 Type-in program ZX81 PeopleDon Lamen