Argh!!! PDP-8/m Memory

Well, with the aid of the "PDP-8/e Simulator" for the Mac, I figured out how to use the front panel, and execute the "Initial Operating Check". Load it into the real PDP-8/m, and start it. Wait a minute, that's not what it's supposed to be doing... After a bunch of investigating, and going back to the "PDP-8/e Simulator" to figure out how to display the contents of memory, I discover that there is nothing in memory :^( Based on the fact I can see what I'm trying to enter when I've got the switch set to 'MD' and hit Deposit, it sounds to me, suspiciously like I've got a bad 4K Core set. Anyone have any suggestions on something to check? Zane | Zane H. Healy | UNIX Systems Adminstrator | | healyzh(a)aracnet.com (primary) | Linux Enthusiast | | healyzh(a)holonet.net (alternate) | Classic Computer Collector | +----------------------------------+----------------------------+ | Empire of the Petal Throne and Traveller Role Playing, | | and Zane's Computer Museum. | | http://www.aracnet.com/~healyzh/ |