Some articles on boot drive unit, boot, drive:
... maintained or specifically set up CSIP = 0000h7C00h (fixed) DL = boot drive unit (see above) MS-DOS 2.0-7.0 / PC DOS 2.0-6.3 MBRs do not pass on the DL value received on entry, but rather use ... MBR partition tables, it won't change things unless the BIOS attempted to boot off a physical device other than the first fixed disk / removable drive in the row ... This is also the reason why these operating systems cannot boot off a second hard disk etc ...
... The boot code in the VBR can assume that the BIOS has set up its data structures and interrupts and initialized the hardware ... operation if it needs more memory it should query INT 12h for it, since other pre-boot code (such as f.e ... in memory as well (and would typically hide themselves from the boot sector by reducing the reported INT 12h memory accordingly, so that they do not get overwritten by ...
Famous quotes containing the words unit, boot and/or drive:
“During the Suffragette revolt of 1913 I ... [urged] that what was needed was not the vote, but a constitutional amendment enacting that all representative bodies shall consist of women and men in equal numbers, whether elected or nominated or coopted or registered or picked up in the street like a coroners jury. In the case of elected bodies the only way of effecting this is by the Coupled Vote. The representative unit must not be a man or a woman but a man and a woman.”
—George Bernard Shaw (18561950)
“The best quality tea must have creases like the leathern boot of Tartar horsemen, curl like the dewlap of a mighty bullock, unfold like a mist rising out of a ravine, gleam like a lake touched by a zephyr, and be wet and soft like a fine earth newly swept by rain.”
—Lu Yu (d. 804)
“That night ended the day when history was written in Abilene. August 14, 1865 was the date. That was the end of the first drive on the Chisolm Trail. It was just the first of thousands of such drives bringing beef to the world.”
—Borden Chase [Frank Fowler] (19001971)