[shrek]

Thanks a lot.
I got IRIX 6.5.28 ISO image. Is this useful for you?

I'm a beginer in mame and IRIX.
I have read https://wiki.irixnet.org/emulation. But I still can't install it independently.
I will try my best to install IRIX 6.5.28.

The last IRIX version supported on the Indy is 6.5.22. This applies to the emulator too. Check out these videos below for a conflict-free install with the 6.5 base, .22 overlays, and NFS. This will get you to a working desktop and you can install more stuff like demo CDs from the graphical installer. This is the guide I used to make the CHD that's hosted here and to install IRIX on my real Octane2. Also in fx you only need to label and sync and it'll work fine. Saves a lot of time. 

https://www.youtube.com/watch?v=ATJ45MBULJ0
https://www.youtube.com/watch?v=RsfDH3yM6nw
https://www.youtube.com/watch?v=GDtJ9fSycT0

In other news, the emulated Indy now has networking if you build from the latest GitHub sources. I haven't been able to figure how to properly set up the virtual adapter on Linux that MAME wants so I can't actually test whether it has internet access.