Yep. A full list of what they mean is found here.
I always used to find it was due to disk read errors most of the time. But sometimes you would get a great crash with loads of rows of bombs.
I think today the ones I got were due to either disks that were not written back to disk properly on the PC, or I was using .st images in the TOSEC set that are not perfect. Writing alternative .st versions of the same games or demos allowed them to work.