While looking up the power requirements for the NI VME-MXI-2 board (http://sine.ni.com/apps/we/nioc.vp?cid=12843〈=US) I checked the adobe spec sheet and it lists three power rails, 5V 3.5A, -2V 100mA, and -5.2V 225mA. I was under the impression that VME slots only had 3.3V, 5V, and 12V supplies. What are the purpose of the -2 and -5.2 voltages on the board and how are they supposed to be supplied?