Modify PC's serial port (add +5v line to power display for Matrix Orbital displays
Pull the serial port ribbon cable from the motherboard. Figure out which side is pin 9 (the one without the red stripe) , and, using a sharp razor
blade, splice the pin 9 wire close to the motherboard. Then, pull a foot or so of the wire away from the ribbon, strip the end, and solder it to the
red wire of a spare drive connector (but for safety insert a 1A fuse in between). Insulate everything, plug it back into themachine (i.e., screw it
back into the serial port bracket, plug it into the motherboard, and plug it into a spare drive plug), and you're all set on this end.