I worked on reverse-engineering it and helped work on an emulator for some time, but (at the time) the operating system for it was not available, only partial d

I worked on reverse-engineering it and helped work on an emulator for some time, but (at the time) the operating system for it was not available, only partial disk images from a machine that had crashed during software installation. We did not know that until we got the emulation far enough to run into the errors though.