diff options
Diffstat (limited to 'src/arch/i386/include/int13.h')
| -rw-r--r-- | src/arch/i386/include/int13.h | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/src/arch/i386/include/int13.h b/src/arch/i386/include/int13.h index 2a193831..72ca97d7 100644 --- a/src/arch/i386/include/int13.h +++ b/src/arch/i386/include/int13.h @@ -69,8 +69,20 @@ struct int13_drive { /** Underlying block device */ struct block_device *blockdev; - /** BIOS drive number (0x80-0xff) */ + /** BIOS in-use drive number (0x80-0xff) */ unsigned int drive; + /** BIOS natural drive number (0x80-0xff) + * + * This is the drive number that would have been assigned by + * 'naturally' appending the drive to the end of the BIOS + * drive list. + * + * If the emulated drive replaces a preexisting drive, this is + * the drive number that the preexisting drive gets remapped + * to. + */ + unsigned int natural_drive; + /** Number of cylinders * * The cylinder number field in an INT 13 call is ten bits |