Was the the rom you broke was a 2716? I don't think MPU-100s are jumpered for any common rom by default. Doubling up a 2716 for a 2732 should always work in boards designed for 2716s, but I'm not sure how the jumpering of a MPU-100 affects that offhand

That is one of those masked proms with a weird pin out. See the pin wiki chart jumper chart. You will have to do some re-jumpering unless you can find another masked prom.

The easiest setup for M100 games is the 2732 combo at U2 (copy /b U2.716+U6.716 U2COMBO.732)

You can take another dead IC chip or even a resistor leg to try and fix your old EPROM. You can even try and solder the broken leg'd chip into a machine pin socket and then stack that into an extra flat leaf IC socket so you don't stretch out the socket on the MPU.

The image is generic to any 2k rom. What matters is what your board is configured for. That a 2516 fits the image means nothing really. Anything is 'jumperable' with enough jumpers, but it's easier to just buy a 2716 then to make a special adapter.