No, there is no config.sys there either. Sorry I don't have bochs installed. I just downloaded the source, and it fails to compile out of the box, seemingly requiring Carbon. The pre-compiled Mac OS X binaries seem very old and don't seem to run.

Dominus wrote:

Usually? Always depends on where such an image is... Could also be /volumes/dosusbstick/images/ultima/u5/floppy.img 😉
That is just path nitpicking and has nothing to do with the problem.

You are completely true, this is correct 😀
When placing the stuff into the user's folder, it can be shortened by ~/...

tman wrote:

The pre-compiled Mac OS X binaries seem very old and don't seem to run.

This is true, the latest Bochs Mac OS X version seems to be 2.1.1 (from 2004), the latest version of other ports seems to be 2.4.5, created in 2010.

I've no idea how to compile stuff myself.

via MacPorts you can "install" bochs (which means it will be compiled). http://www.macports.org/
But that may be overkill...

Edit... hmm, and if you are on OS X 10.6 it won't build for you...
see http://trac.macports.org/ticket/23938

All IBM PC Compatible Ultima 1-5 floppy versions have disk-based copy protection. There is a program that will strip the protection.

Could the boot block code be a virus?