[Open-graphics] Synthesizing oga1hq

[Mark]

Timothy Normand Miller wrote:
> instructions.  Also, in response to his question, I'm targetting the
> 3S4000 because it's convenient.  In the real design, we'll target the
> XP10, which is a little slower.  Either way, this tells us basically
> what we need to know.
> 
Doesn't that make this whole discussion moot?  The XP10 doesn't have 
hard multipliers, as near as I can tell.  Regardless, the architecture 
and timing aren't necessarily even remotely similar (well, sure, they're 
both island-style FPGAs using 4-LUTs... but that's still a big design 
space).

I'd be wary of putting to much stock in XST's timing estimates, anyhow. 
  Until you've got post-PAR timing, don't bank on it.

Finally, I don't think you mentioned the speed grade and package you're 
using for the Spartan or the Lattice part.  (Both are on the board, 
right?  I'm going off 
http://wiki.duskglow.com/tiki-index.php?page=OGD1+components+guide.) 
Your timing numbers will depend on that, too (even in XST's output, I 
believe).  Have those aspects been specified yet?  I mean, at least the 
package is presumably known.