DOS and GHOST

[Jonatan44]

Hello everyone,
i have some questions regarding DOS and GHOST...
while DOS running, is the operation system uses a driver for the disk IO or just uses int 13 for that?
when we launch ghost for disk cloning operation, does it uses int 13 for disk operation? i believe it's load a driver and not using int 13 since the disk IO are very fast comparing other int 13 operations...

can anyone help me solve those questions?


thanks !

[Brynet-Inc]

(MS,IBM,etc)-DOS runs in real mode and uses BIOS interrupts for almost everything, searching for this "Ghost" program I came across a Wikipedia article for "Norton Ghost".

According to the version history, versions prior to 4.0 ran exclusively in real mode.. they may have used interrupts at that point.. but subsequent versions run in protected mode, so it would seem that they wrote their own drivers.

Hope that helped.

[jal]

but subsequent versions run in protected mode, so it would seem that they wrote their own drivers.

Or they simply used a DOS extender that thunked back to the BIOS.


JAL