android@... wrote:

> Should be easy to syntetise the source for the DE2 board in a
> DE270?

The only issue I think you'll have is the SDRAM controller, as the
configuration of the SDRAM on the DE2-70 differs from the DE2.

I have ported the DE2 to custom hardware with differing SDRAM and it boots
Kickstart and runs the floppy disk emulation menu - although I can't get it
to successfully boot a floppy image. Having said that, I have the same
problem on a DE2 when I build the DE2 version myself as well, so I'm not
convinced there's not a problem elsewhere...

The SDRAM on my platform is larger than the DE2, but the SDRAM controller
appears to handle it because it drives 1 more address line than the SDRAM on
the DE2 requires. I punched it out to the top level and, as I said,
Kickstart boots so I'm reasonably confident that it's refreshing the SDRAM
on my platform correctly...

Every other aspect of the design should run as-is...

Regards,

--
| Mark McDougall | "Electrical Engineers do it
| <http://members.iinet.net.au/~msmcdoug> | with less resistance!"