I believe I now have my TU-56 and TD8E working. When I mount a tape and attempt to boot my one OS/8 tape it loads to the point of printing "SYSTEM ERR" on the teletype. I strongly suspect that the tape is probably corrupt. I'm wondering if there is anyone out there who would be willing to copy any kind of Bootable PDP-8/E tape for me so I can test with a known good tape. I would be more than willing to provide a couple of tapes for the copy. -- Christopher L McNabb Operating Systems Analyst Email: cmcnabb(a)4mcnabb.net Virginia Tech ICBM: 37.1356N 80.4272N GMRS: WPSR255 ARS: N2UX Grid Sq: EM97SD