Richard wrote:
In article <m1GmeRt-000IypC at p850ug1>,
ard at p850ug1.demon.co.uk (Tony Duell) writes:
But I would not want to replace the CPU boards in
the PDP8/e on my desk
with a board containing an FPGA + level shifters.
Just like noone was talking about replacing this list with a wiki,
noone on this thread has talked about *replacing* CPU boards on a
vintage machine with an FPGA.
What *was* talked about was making an FPGA equivalent processor so
that it could be dropped into a board sans CPU to make the board
function again.
Well, if it turned out to be easier to make a whole new KDJ-11A from
scratch rather than just the chip, then that's what I'd do. Or maybe if
I *could* replace just the chip but needed to modify the board to do so,
I'd be inclined to look at replacing the whole board with a "modern
equivalent", on the off-chance that I could eventually repair the
original board.
Plus, if you made a KDJ-11A entirely from scratch, you could do other
stuff to it - perhaps add an instrumentation port for tracking down
other problems (you'd need this for development anyway), or something to
drive proper blinkenlights...
Gordon.