On 05/20/2017 04:59 AM, jim stephens via cctalk wrote: > I just ran across a sale on epay by a guy who thought you could pull > the processor chip off the board and sell each in separate auctions. > > I couldn't find the processor from the huge number of gold scrap chip > auctions he had, but he said it (or the other) chip(s) for the board > were listed. > > I think giving him the benefit of the doubt, he thought that the two > were separable like motherboards and processors are now day. Worst > case he was just an unfortunate idiot that destroyed the board. > > I sent him an email telling him the value I place on it (tested) and > suggested that he think of older boards as the full components to be > kept together unless he wants to destroy the board, or knows what he > is doing breaking them up. Of course on old Qbus and the like boards, > one does have some components that are more valuable if you break up > the board, and pull "unobtainium" chips. But pulling out the KDF > processor isn't one of them in general. > > I just bought a KDJ Jaws chip for a "round 2it" project to try to get > it running, as I archived a PDP11 "Hack" page indicating how to get > one running on a proto board with minimal hardware. > > I don't know if you could do that with the KDF, but that isn't what > this guy is doing. > Argh, CPU chips used on dec board loose value as the complete board carries the value.
KDF with the second chip is useful but the logic needed to may a "CPU" of the raw chips is not trivial. Best chip for hacking and useful off a board (Falcon, KXT11, RQDX, others) is the T11. Its easily useful like a 8085 or Z80. Allison > thanks > Jim >