I have a first stage bootloader written in assembly. I need that it loads the second stage bootloader from dvd(or cd). I only found examples where it reads from floopy or hdd. The interrupt used there is 13h. In the interrupt description it says that it can read floppies and hdd’s. i’ve tried to use 13h to read a CD as if it was a floppy but it did not work.
Question: is there a difference between floppies and dvd’s (in the sense of accessing them), can i use CHS(cilinder, head, sector), what its the sector size, can i use the 13h instruction to correctly read a dvd. maybe some examples. I’ve looked at LILO’s source code and found only 13h there so it must work. Thanks.
A bootloader loads from DVD – it loads from floppy or hard disc. The DVD / CD runs in emulation mode and exposes a floppy / disc during the boot process