ACC switch = binary representation to the system of how many ACC consoles are connected to the system (1-4)
SW CARDS switch = binary representation to the system of how many switch cards are connected to the system (1-16)
OPTIONS = doesn't do much, I think one changes the RS-232 port from DCE to DTE, and the other was for a pocket pager interface that was never developed.
RESET = resets system, power cycles ACC consoles
STATUS = changes operation of LED indicators LD1-8 on board. In one position, it will show the communication between the ACC's and the digital card. In the other, it will display a binary representation of system errors.