On Jul 31, 2014, at 3:36 AM, Terry Stewart <terry at webweavers.co.nz> wrote: My Retrochallenge entry is complete. One month of working on the Ohio Scientific Challenger 4P and blogging as I went, with some good outcomes. http://www.classic-computers.org.nz/blog/2014-06-30-fixing-C4P-ram-expansio… It's a great way to focus on things that would normally be in the 'round tuit" corner. Terry (Tez)