testing

1. I plugged it in, turned it on and got lights.
2. I set the HLT/RUN switch to HLT.
3. I verified that each address LED lights when the corresponding address switch is in the up position and goes out when the switch is down.
4. I also verified that I could program RAM by setting different binary patterns on the data switches and pressing the DEP switch. I checked this at several RAM addresses (the motherboard has 1k of RAM starting at address 0000 hex).
5. I used the switches to put in a very short program at address zero ( BRA 00 00 ), pressed RESET and then RUN. After several seconds I pressed HLT and verified that the address LEDs showed the 680 stopped at address 0002. If it had not executed BRANCH to address ZERO correctly, it would not have stopped at at the correct address.
6. Without a Monitor EPROM I could not easily check the serial port (sorry).

My conclusion is that the power supply, motherboard and front panel appear to be working as I would expect them to.