Nios-I speed in QuartusII 5.0

Hi,

Yes, I posted this query on comp.arch.fpga also.

Thanks for the suggestions but it's not a QuartusII-4.2/5.0 synthesis/fitting issue as such,

it's something to do with the SoPC-Builder in 4.2 and/or 5.0.

I don't have any problem importing the 4.0 database into 4.2 or 5.0 and running it

through synthesis and fitting, when I do that the timing meets the 90Mhz target.

However, if I re-generate the Nios sub-system using SoPC-Builder in 4.2 or 5.0

and run through synthesis/fitting, then the performance drops to around 70Mhz.

If I was a cynic I would wonder whether Altera have made Nios-I slower in order to push

people towards Nios-II :-)

Alan