On the feasibility of PPC for Minimig/Fpgaarcade etc.

[billt]

I cant imagine that any FPGA would be fast enough to runa  PowerPC core.  Even if they could what would be the point.

I'm sure that was once said about 68K or any other CPU softcore at one time.

What would be the point? Why not? For those decrying it as a sane business proposition, that's one thing. But some involved with such things like Minimig are doing it more to learn how and/or have fun than anything else.

[billt]

(I recall the only available m68k has an incompatible instruction "MOVE sr,")

The "only available m68k"? There's a few of them on opencores alone.
http://opencores.org/project,tg68
http://opencores.org/websvn,listing,k68
http://opencores.org/project,ao68000 (which I'd like to see happen in minimig)
http://experiment-s.de/en/atari-ste-in-a-chip/

Besides, they're open-source. Fix it.

[billt]

I say make a pci-e interface daughterboard for replay so you can plug it into an amigaone board and use it for all the classic stuff.

Does Replay have PCI-Express capability? There are some FPGAs capable of such a connection, but I don't know if the one chosen for this board is one of those or not, or if any connection area was laid out on the board with that kind of signalling in mind. I'd have suggested much the same thing but via PCI32 if there's enough expansion pins available.

[billt]

billt, Minimig uses a physical m68k chip. With a softcore you can correct anything at will.

Minimig has some constraints regarding volts, physcal package etc.. so it's slightly picky about what chip can be used asfair.

Ah, sorry. I have a DE1 board and forget the original board had a hard CPU chip. I think of Minimig as all-internal to FPGA SoC design, not as a particular PCB. I'll try to remember that part.