Very coincidental that this obscure topic should come up! I happen
to have an X-Calibur board. The other day I was reading the readme
file on the driver disk that came with the X-Calibur and it gave me
an idea. According to the doc, the X-Calibur is "designed to be
fully upward compatible with the 'soon to be released' 68060
processor from Motorolla". That got me thinking. Hmmm.. Does that
mean the X-Calibur could (in theory at least) ride atop, say, a
CyberstormPPC card?? Just out of curiosity I checked the orientation
of the chips on the two boards and how this might be done. And you
know what? They line up *almost* perfectly! I say almost because
the X-Calibur would barely clear the PPC with a small heatsink,
leaving no room for a fan. A platine or riser of some sort would
have to be built to raise the X-Calibur enough so that the PPC could
breathe. The other issue(s) I can forsee would be to make sure the X-
Calibur does not feed the 68060 +5V. Power would have to be
converted to +3.3V for the 060. The memory on the X-Calibur (4x72
pin SIMM 32M/each) should be easily addressable by the Cyberstorm,
right? Same as if I had a DKB3128 plugged into a Zorro slot. Also,
the BlizzardPPC can address 256Meg so I see no reason why the
Cyberstorm couldn't. It sounds kind of crazy but after considering
this a bit, I actually believe this could work.
Comments/feedback/assertions of insanity are more than welcome on my
idea.

--- In Amigacoldfire@yahoogroups.com, "Jaime Cagigal" <jcagigal@...>
wrote:
>
> Hi!
>
> As Oliver talked about a coldfire design that plugged into a 030
> socket I wonder if it would be very complex to create a board
similar
> to the old X-Calibur board for A3640, that plugged between the 040
and
> the A3640 and contained 128MB (soldered). There are thousands of
A3640
> boards out there that are almost useless because you can't fit more
> than 16MB in the motherboard. I guess that with a small FPGA that
> acted as memory controller for the 040 and a pair of 64MB DDR memory
> chips it would be enough. If it didn't eat much space this could be
> useful for old A2000/A500 memory boards... There are DDR memory
> controller at opencores.org. I guess it would be possible too to
> include a simple gfx card connected directly to the 040 bus (That
> would provide a very fast bus to gfx ram), mapped to an unused
memory
> area (but that probably would be too much complex for such a tiny
> board).
>
>
> --
> Saludos/Best Regards
> Jaime Cagigal
>