U24 is an 87C52 programmable microcontroller.
I have a sound board from a Pinball Magic that I want to put into an Airborne. The manuals call out different capcom part numbers for the chip depending on which game it is in and the chip in mine has a decal that calls it "Magic Music U24 Rev1.02"
I can burn the rest of the eproms at U28-U31, but if U24 is something specific to each title I'm hosed.
Any body have any experience with swapping these boards?