PDP Manual on eBay

I once owned an 8/F (er, a "pdp 8/f" I think the faceplate said) and it quite definitely used real ferrite core for RAM. I'm sure of this both faithfully across multi-week-long power-downs. Whether this was true of all 8/fs or not I have no idea. I do know that memory was addable and removable (my machine had five of eight possible banks populated), so presumably it would be possible to replace a board of core with a board of semiconductor RAM provided you were careful to present the same interface to the rest of the machine. I also never looked in enough detail to see whether it used discrete stock chips, ROMs, custom chips, or what, for its logic. It was made up of enough boards that I'd have no trouble believing the first. I no longer have the machine. I gave it to a much more serious collector quite some years ago, in the late '90s I believe it was. /~\ The ASCII der Mouse \ / Ribbon Campaign X Against HTML mouse(a)rodents.montreal.qc.ca / \ Email! 7D C8 61 52 5D E7 2D 39 4E F1 31 3E E8 B3 27 4B