Format of PCMCIA Power Management table:
Offset	Size	Description	)
 00h	WORD	number of entries in table (0 if power management not avail)
 02h 2N BYTEs	power levels
		byte 0: voltage in 0.1V units
		byte 1: power supply
			bit 7: Vcc
			bit 6: Vpp1
			bit 5: Vpp2