Can you program a Picaxe if you use an adapter to connect the serial programming cable to a 15 pin serial connecter? Or could you simply use jumper wires with male headers to connect them? If so which pin needs to connect to which?
You mean 9-pin right?
And yes, the picaxe manual shows the end of a 9 pin connector and which pins the "headphone plug" is connected to. You still will need the 10k/22k set-up on the picaxe board.
I mean, can you use a serial-to-serial adapter so you can connect the Picaxe Serial Programming to a 15-pin serial port.
Are you talking about very ancient twenty five pin serial ports? DB25?
Once more: TWENTY five? Because I have never heard of the port you are talking about. That almost sounds like a video (VGA) port... Don't hook up your electronics to a VGA port. That can't be good.
I second rik --that is not a serial port, that is a VGA port. Don't put things there.