Building:
	Configure support

Serial:
	Baudrate support
	Break handling (Force to debugger)

IDE:
	Support multiple drive
	ATAPI CD-ROM boot

BIOS function:
	version
	delay
	Flash memory handling ---> Return free area start
				   write/erase can be done with MTD driver
	LED handling
	LED heartbeat

	Distinguish manual reset, hardware reset, exception

CqREEK SH-3:
	Dip switch read
	CTS/RTS handling
	Don't use NMI, but handle break

DONE:
	reset/shutdown
	RTC handling
