ST-DOS

The linked article is about the features, changelog and source for the kernel and userland of ST-DOS. The kernel can be compiled and linked using Open Watcom compiler. The kernel can be loaded to anywhere in the memory and must be started by doing a far jump to the beginning of the code with offset 0. It also mentions ST-DOS specific features, such as support for different keyboard layouts and 8 TB ISO9660 filesystems. The bootloader searches for a file named KERNEL.BIN from the root directory of a FAT12/16 filesystem and loads it to memory. It also includes bootable images and md5sums.