In article <4563488E.8050405 at bluewin.ch>,
Jos Dreesen / Marian Capel <jos.mar at bluewin.ch> writes:
Am i the only one that feels that using modern
FPGA's to recreate old
CPU's is getting dangerously close to just running an emulation on a
modern PC ?
Well, first off creating the CPU in an FPGA by writing your own
verilog to implement the CPU can be very instructive w.r.t. the
instruction set of the original CPU.
Second, creating the CPU in an FPGA so that you can use it to get
vintage equipment running is certainly *not* like running an emulator.
Thirdly, I don't see anything "wrong" with running an emulator. Its a
cheap and easy way to experience the old environments.
The advantage of an FPGA is that it lets you emulate old hardware as
well, hardware. For instance, I'd really like to be able to run my
PDP-11/03's CPU without powering up the RL01s. The best way to do
this, IMO, would be to provide "fake" RL01s to the RL01 controller as
a piece of FPGA hardware that talked over USB (or whatever) to my PC
to supply the data.
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