how do I turn that damn alarm off?

[David Pertuz]

'96 P10 G20t with factory alarm.

Go out to jump-start it with jumper pack, and when I hook up power to the battery, the !@$# alarm goes off. It's the first time I've ever even heard the alarm on the car. Can't figure out how to turn it off, and can't start car. I'll figger this out eventually, but does anyone have a quick answer? First time it's happened. 

David