# BIOS storage access through INT13H

The units at [drv/pc/int13h.fs] implement a driver to access the boot drive
through the BIOS INT13H call.

It implements "biossec@ ( sec buf -- )" and "biossec! ( sec buf -- )" as well as
the "bootsec@" alias to "biossec@" (for [doc/io/secld]).

It also implements a Drive structure around those calls, called "INT13hDrive",
but without depending on [doc/io/drive]. The idea is that this unit is needed
really early in the PC boot process and running on a really tight memory area.
One will want to load this unit, then [doc/io/secld], and only then bootstrap
the rest of the boot payload.

This driver is probably unreliable (it has to go in real mode and the process
for doing so is very very hairy. I'm not sure of how solid it is.) but will work
on all PCs until a better driver is activated.
