Signed-off-by: H. Peter Anvin <hpa@zytor.com>

Impact: Fixing typos

Fix some typos in the comboot documentation

Conflicts:

	memdisk/memdisk_chs.asm
	memdisk/memdisk_edd.asm
	memdisk/setup.c

Resolved:

	Deleted memdisk/memdisk_chs.asm
	Deleted memdisk/memdisk_edd.asm
	Modified memdisk/setup.c

With this patch, users can now boot El Torito-bootable .ISO (CD/DVD) images.
The user should specify "iso" on the kernel command-line.

We expect to use Linux kernel coding style, minus the indentation
level.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

Try to HLT the processor during idle.  All the events we care about
should have interrupts associated with them, except possibly the
serial console.  Try to deal with the serial console by waiting some
time before going into HLT, and giving the user the option of enabling
the serial console interrupt, on the assumption that the BIOS will
simply IRET.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

When entering 16-bit PM after shuffle and boot, we might as well
do so sanely.  Specifically, set up the data segments so that they
match the code segment, generating a 16-bit "tiny" model environment.

This makes it a lot saner to bootstrap a proper PM environment from
there if that is what the user intends.  For the presumably more
common case of RM entry, it won't do any harm, and it's only a handful
of additional instructions.

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>