Add 2 ea (R7, R8) 470k ohm resistors, 1 ea (R9) 10k ohm resistor and 1 ea (R10) 100k ohm resistor. Solder to board.
Step 12 - (PS2) Power Plug
Add 1 ea (PS2) Power Plug and solder to board.
Step 13 - (RS232-DB9F) DSUB connector
Add 1 ea (RS232-DB9F) DSUB connector and solder to board.
