guys,
The link of OpenRISC Ubuntu VirtualBox image is dead. Who can give me a proper link? I will appreciate.

The old virtualbox image is very out of date, so even if you could find it I don't think it's very useful. As far as I know,there are no newer images available either, so your best chance is to collect all the pieces yourself. OpenRISC development has move away from opencores several years ago, and most of the code is now on http://github.com/openrisc/

I'm not sure exactly what you're looking for, but we have started to collect some tutorials here https://github.com/openrisc/tutorials/ that might be useful

//Olof

Thank you so much.
I am trying to learn and use altor32, and implement some simple designs finally running on our own board(we are Chinese FPGA manufacturer and producer). I have two things to deal with, first, I have to build a development enviroment using virtualbox. Second, I have to compile all the relative files and then debug. Where can I find the guide for these?