The test board was created to test the memory board. It consists of one 8-position control switch, two 8-position data bus switches, and three 8-position address bus switches. There are also some logic gates and bus drivers on the board. The board connects to the connectors on the memory board in place of the control board so that the memory and devices can be addressed, controlled and tested. There is no display on this board; the display will be the front panel LEDs on the memory board.