pxeboot and serial console

[Danny Braniss]

I can't tell when this broke, but compiling pxeboot with
BOOT_PXELDR_PROBE_KEYBOARD set would redirect the console to the serial
port if no keyboard was detected. This no longer works, which explains
the problems i had with the serial port on my intel 1U servers.

the relevant code is in /sys/boot/i386/pxeldr/pxeldr.S.

compiling with BOOT_PXELDR_ALWAYS_SERIAL works as expected, so IMHO
the test:
	testb $KEYBOARD_BIT, MEM_BIOS_KEYBOARD # keyboard present?
is failing, but i have no idea why

any ideas?

	danny