Re: Encrypted VHDL file

Altera_Forum · ‎02-25-2005

Hi,

I recently received Nios-II update package. When trying to open

a VHDL source in cpu.vhd, I got the following message.

"Can't open encrypted file "C:\altera\kits\nios2\examples\vhdl

niosII_stratix_1s10\standard\cpu.vhd" -- license file support

for this file includes compilation support, but does not include

viewing support"

I am using Quartus-II version 4.2 with two entries in the

"Licensed AMPP/MegaCore functions" listing. Note that I have

no problem viewing other VHDL files in the same directory.

I sent email to Altera for help but have not heard back from

them for a week now. Well, I actually got this lame reply today.

> Date: Fri, 25 Feb 2005 08:10:50 -0800

> Subject: RE: your mail

>

> Are you still having problems? Have you tried our customer support

> e-mail line? Did you try to install the license twice?

>

> We want to help you.

Can anyone help?

Thanks,

Angkul

Altera_Forum · ‎02-25-2005

The Nios II CPU is encrypted by design... having an ordinary license to use Quartus/Nios II does not remove this encryption. Note that RTL simulation support is provided.

Altera_Forum · ‎02-25-2005

Thanks for a quick response. Does it mean that I cannot add anything to Nios-II CPU?

I added a branch predictor in Nios-I and would like to test it on Nios-II. What additional

license do I need? Note that I already have two licenses for Megacore Functions.

Altera_Forum · ‎02-25-2005

I am on the engineering side now so I'm not really sure how we handle license requests for the non-encrypted core (as is done for other IP as you indicate). My reccomendation would be to talk to your FAE/sales person about it.

BTW: The Nios II/f core does include branch prediction. I am not well studied on how this is actually implemented but I recall that there is a short discussion of it in the Nios II CPU documentation.

Altera_Forum · ‎02-25-2005

Hummm, you want to add a branch predictor. You could always just modify the perl code used

to generate the RTL. Look in c:\altera\kits\nios2\components\altera_nios2\*.pm.

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