PCB arrived. Built it. Tested it. It took a lot of FPGA tweeks to get it working like I want.

Pushbuttons

• DISP - cycles  between DISP LEDs [AC, MD, MADR, PC]
• STEP - single step the CPU
• LDPC - load the PC from the bottom slide switches
• DEP - store the value from the bottom slide switches to the memory at the current Program Counter
• LDA - load the Accumulator  from the bottom slide switches
• RES - reset the CPU
• PB1 - spare

Slide Switches

• 0-11  value that is loaded by the pushbuttons. Also the address value in MD mode
• LNK - set the LINK bit when the accumulator is loaded (not yet  implemented?)
• RUN/HALT - up = Run the CPU from the current PC, down = Halt the CPU

LEDs

• 0-11 - displays the value in the register/memory location selected by the DISP LEDs and selected by the DISP pushbutton
• PC - display the Program Counter value on 0-11 LEDs 
• MADR - Not used
• MD - displays the data in memory at the current PC on 0-11 LEDs
• AC - displays the Accumulator value on 0-11 LEDs
• LINK - display the link bit (not yet implemented?)
• RUN - illuminated when the CPU is running, off when the CPU is halted
• PWR - power LED

Mounted above FPGA Card