* chain.c
*
* 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.
If you boot from CD (ISOLINUX), all entries with 'on first hard drive' will boot your internal HDD (in normal cases at least).
When you boot from an USB stick (SYSLINUX), all entries with 'on first hard drive' refer to your USB stick (if it is detected as HDD in BIOS, not if is detected as a floppy). So you need the 'on second hard drive' options to boot your internal HDD.
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