These replies are correct, it still works but shows an upside down pattern on the scope, if you still have one of those stone age machines. Any way the more important question is do electrons flow from positive to negative or is it really the reverse? There are a lot of thoughts on this but yet all the positive ground cars were electrical pieses of poo, but that could have just been because Lucas did the electrical on them. lol

It's like the old joke, Do you know why the British drink their beer warm? Because Lucas makes their refrigerators.

You old timers will get it, you young guns may not.