From: utzoo!decvax!ucbvax!C70:info-cpm Newsgroups: fa.info-cpm Title: Article-I.D.: ucb.1283 Posted: Fri Jun 4 14:13:20 1982 Received: Sat Jun 5 03:59:56 1982 >From decvax!harpo!ihnss!ihuxk!ajm55611@Ucb-C70 Fri Jun 4 14:12:45 1982 Have you tried replacing your z-80? It's just a thought. I once had an 8080 which worked perfectly except for popping a even address off the stack after an interrupt. That was a really hard one to find. Al, the wonderdog ihuxk!ajm55611