mspacpls (Ms. Pac Plus) does not have this option in the current version. Sure there are cheats that enable the speed up hack, but the Hot Pursuit was different. It's my understanding that the "pacman.c" driver was moved from dipswitches to "configuration", but unfortunately the speed up with button, AKA "HOT PURSUIT" was not implemented, nor is it part of the cheat files that you can find. I honestly do not know the history of the Hot Pursuit cabs. I'm guessing it was an add on chip that you could use, from what I can see, the chip is still available for authentic cabs, but it WAS IN FACT a type of cab that you could play in the arcades: https://forums.arcade-museum.com/thread ... on.176742/
The button type was inconsistent, indicating this was more then likely an add on chip that owners could buy to speed up the game. Combined with the regular speed up, the Hot Pursuit versions, IMHO, were the most bad ass versions around. I got it working on Windows 10 in attract mode using 0.111 https://www.youtube.com/watch?v=pZ6012jHGF0
would love to see this brought back in future mame versions. What I'm wondering, is if I can just take the older pacman.c driver, and just recompile it for current mame versions and make it work.. Guess I'll have to try and see what I get. Maybe there is more to it that I'm missing here.