Reader deduced that his ZX81 logic chip (ICl) had failed from the keyboard line and diode matrix.
Logic Chip Failure Symptoms PublicationSyntaxPub DetailsSyntax/Syntax ZX80 v3 n5Volume: 3 Issue: 5DateMay 1982Pages4Read the articleSee all articles from Syntax/Syntax ZX80 v3 n5 Reader deduced that his ZX81 logic chip (ICl) had failed from the keyboard line and diode matrix. TagsSyntax 1982 ZX81