Hey guys. I saw the thread about the assembler doing divide by 2 the wrong way. I took a look at my assembler and it had a similar bug. I fixed my assembler, then ran the code again. It correctly writes the RF11 image (as best as I can tell), then reads /etc/init into the user area and executes it. I left the TC11 disabled on my run and it panics when /etc/init tries to read the tape. To double-check, I ran the warm boot and it successfully gets into the /etc/init user code as well, so I'm pretty confident the image is right. As far as I can tell, the source code I sent out this morning has no problems. Most likely, you guys are fighting assembler and/or other tool issues. I'll cobble together a bootable RF11 image (assuming that there really are no kernel problems) and send out a copy of that. Once everyone has that, they should be able to continue generating tapes and RK03 images of other executables, etc. I can include a copy of the assembler listing file for both warm and cold boots so that everyone can have a reference while they are debugging. I've also got the M792 boot (from the documentation) as well as an untested bos.s. If those work, then the RF11 image I send out will be pretty close to authentic. Otherwise, you will still need to load the kernel into core with the "load" command. James Markevitch