ow that the image has grown beyond the 1.44M that fits on a floppy.
(previously, the floppy emulation mode was used for cd's.)
the boot cd now uses 'no emulation mode,' where an image is provided on
the cd that is loaded and executed directly. this is the boot monitor.
in order to make this work (the entry point is the same as where the
image is loaded, and the boot monitor needs its a.out header too) and
keep compatability with the same code being used for regular booting, i
prepended 16 bytes that jumps over its header so execution can start
there.
to be able to read the CD (mostly in order to read the boot image),
boot has to use the already present 'extended read' call, but address
the CD using 2k sectors.
for the boot floppy instead of copying it from the current root partition.
This makes making a boot floppy at installation time before booting from
the new system possible (conveniently).
. Less dependency on scripts to be executable (they're in cvs)
. issue.install is the /etc/issue that goes on an install CD
for instructions (but not on the installed system)
. /usr/src goes on the CD uncompressed
