*
*
Chainload a hard disk (currently rather braindead.)
*
* Usage: chain hd<disk#> [<partition>] [options]
* chain fd<disk#> [options]
* chain mbr:<id> [<partition>] [options]
* chain boot [<partition>] [options]
*
* ... e.g. "chain hd0 1" will boot the first partition on the first hard
* disk.
*
*
* The mbr: syntax means search all the hard disks until one with a
* specific MBR serial number (bytes 440-443) is found.
*
* Partitions 1-4 are primary, 5+ logical, 0 = boot MBR (default.)
*
* Options:
*
* file=<loader>:
* loads the file <loader> **from the SYSLINUX filesystem**
* instead of loading the boot sector.
*
* seg=<segment>:
* loads at and jumps to <seg>:0000 instead of 0000:7C00.
*
* ntldr=<loader>:
* equivalent to -seg 0x2000 -file <loader>, used with WinNT's loaders
*
* freedos=<loader>:
* equivalent to -seg 0x60 -file <loader>, used with FreeDOS kernel.sys.
*
* msdos=<loader>
* pcdos=<loader>
* equivalent to -seg 0x70 -file <loader>, used with DOS' io.sys.
*
* swap:
* if the disk is not fd0/hd0, install a BIOS stub which swaps
* the drive numbers.
*
* hide:
* change type of primary partitions with IDs 01, 04, 06, 07,
* 0b, 0c, or 0e to 1x, except for the selected partition, which
* is converted the other way.
*/
