KDF 8189 processor board foobared (ebay warning)

[allison]

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
>