Good day all,

First of all, many thanks to Ryan and other people who made IRIX emulation possible.
I have installed IRIX 5.3 without any problem and trying to do the same with IRIX 6.5.

Boot from CD (Installation Tools June 98) works fine, but when I am trying to run the following command:
boot -f dksc(0,6,8)sashARCS dksc(0,6,7)stand/fx.ARCS
MAME hangs and then crashes with the following log (see image)


Could anyone suggest me how to install IRIX 6.5 properly?

Have you checked this post? https://forums.bannister.org/ubbthreads.php?ubb=showflat&Number=115574#Post115574

I don't believe MAME supports mounting .IMG files directly, only CHD and ISO. For what it's worth, I'm not sure what you mean by "Booting from CD works fine", because the system itself does not boot off the CD. The invocation of the boot -f command is the first time the system is reading data from the CD, which would seem to indicate that there is an issue with either the image itself, or MAME's handling of it.

If you would be so kind as to direct me to where you obtained that particular IMG file, I would be happy to look into it.

The img files are equivalent to isos in practice, they're sector images, just not iso9660. You can find that one on IA: https://archive.org/details/sgi_IRIX_6.5_Installation_Tools_June_1998

Maybe the file was truncated on download or something? That backtrace looks like it fell off the end of the file.

Alternatively, rename the file so it ends in .iso and maybe that will help.

Also, make sure that it's a 2048 byte image and not a 2352-byte ("raw") image that you're using

robcfg, Just Desserts, Olivier Galibert, R. Belmont, Darkstar thank you for your help.
I don't know how it exactly works, but renaming *.img to *.iso helped me to boot and install IRIX 6.5.