
If you're finished with the keypad then press the KEY REL button and the computer will now be able to use the display otherwise, typically, it will display the information it wants to show you after you finish entering the data you're typing in. If you are entering data into the DSKY when the computer wishes to display information, the KBD REL light will light up. Press RSET to reset the error indication and continue. If you attempt to enter too many digits, or attempt to ENTER a VERB/NOUN combination that isn't supported, the OPR ERR light will light up. Note that whenever you enter data into the DSKY you will have to enter initial zeros in this way if the data would not otherwise require you to enter a digit in a specific column. So press 'NOUN', then 0, then 1, then ENTER. VERB 37 will flash on the display: this is the 'change program' verb: the computer is currently idling in program 00, but suggesting that you enter a new program to run.
THE NOUN PROJECT CROSS SECTION PRO
However, if you prefer to do things the 'proper' way, press the PRO key on the DSKY to start the computer. If you start the engines it will automatically start up as they ignite.

Once the lights have turned off, the computer goes into standby mode with displays blanked and just the STDBY light lit. If you get bored, just hit 10x time acceleration briefly. On a real Saturn V this would check all the computer hardware, but since we can pretty much guarantee that your PC is going to multiply and divide correctly if it's managing to run Windows, here it just does the final stage, and tests the display by outputting a selection of test patterns. When you first start up your scenario the AGC will spend about thirty seconds running through its self-test program on the DSKY, just like a PC does.

Diagram of DSKY interface for reference, showing LM and CM lights A15_DELCO
