Mike_Parks:
Looked through lots of web pages on the L298 and none of them mentioned this.
That's because the L298 chip doesn't have any jumpers, it's just a chip.
Anything you have that needs a jumper is an L298 module, an L298 chip on a board, an implementation of the chip in a way designed by the module maker. With those things you have to track down info on the specific module by make and model, since the pins and jumpers and power connections and whatnot will differ from module to module.