Hi,
I'm triying to start my computer from a 1.44" disc, by writing my own boot sector. So far I can print out a few characters, but if I'm trying to adress some memory (e.g. SEGMENT $7000) the system halts ?! This part of the memory isn't used by the BIOS (as far as I know), so I can't figure out why this stupid program cancels execution. Can somebody tell me where to get information about what the BIOS exactly is doing at boot time, or better which parts of memory it is using (except from the boot vector table @$0000).
This is important, because I want to load an own command interpreter form disc. So I have to continue execution from somewhere else than the boot sector (there's only 512 byte space for me ;-))
Any hints would be appreciated
greetings moo
I'm triying to start my computer from a 1.44" disc, by writing my own boot sector. So far I can print out a few characters, but if I'm trying to adress some memory (e.g. SEGMENT $7000) the system halts ?! This part of the memory isn't used by the BIOS (as far as I know), so I can't figure out why this stupid program cancels execution. Can somebody tell me where to get information about what the BIOS exactly is doing at boot time, or better which parts of memory it is using (except from the boot vector table @$0000).
This is important, because I want to load an own command interpreter form disc. So I have to continue execution from somewhere else than the boot sector (there's only 512 byte space for me ;-))
Any hints would be appreciated
greetings moo
