> Try booting the 5160 from the floppy with the hdd attached. If the hdd is readable > use sys c: to copy the system files and rewrite the boot sector again.
Please, read my previous messages... I said that even with both attached it says "Missing operating system" and nothing else happens.
Do you have an image file of a bootable floppy which is working with your ibm5160? If yes, I'll PM you. If you have a working floppy for ibm5160 then I guess my boot floppies may have the wrong format for the machine.