The kernel can be compiled and linked using Open Watcom compiler. The kernel does not make other assumptions about the bootloader than that in the memory address 0xFC15 there must be the BIOS drive number of the system drive, and in the memory address 0xFC1C the 32-bit index of the first logical sector of the boot partition. The kernel can be loaded to anywhere in the memory (as long as the starting point is the beginning of a paragraph) and must be started by doing a far jump to the beginning o...