I was wondering if someone could supply me a URL or information about the finer details of the DOS startup process. I have a project in Assembly to load the DOS KERNEL (residing on a floppy drive). I have also managed to figure out where (in memory) which files (e.g. io.sys , msdos.sys and command.com) are loaded..but the problem seems to be that e.g io.sys is 38k in MS-DOS 6.22 but in memory it is loaded in two different places..firstly at location 0070:xx (system data 3k) and seconldly at location 00B82 onwards (11k system data)..now the question is..WHICH part of the 38k file (io.sys) are these 11k and 3k portions loaded in memory..any help would be greatly appreciated

here is the disassembled version of bootsectors the bootsector on a disk loads the io.sys if you need help with this -> mail me here is the link botdiss.txt good luck