How does MAME handle U37 on Vegas Boards?

[Loopey1]

Hello all, I have a question. How does MAME reproduce the security Chip (U37) on the Midway Vegas boards?
I can not seem to find any information on these chips.
(I need to burn a new security Chip for a game running Vegas hardware.)

[Haze]

the security chip provides a serial number, we simulate it.

there are no dumps to burn into a new chip.

[Loopey1]

OK, thanks for that answer.

So where in the system does it simulate it? in the vegas.c file or elsewhere?

[Haze]

src\mame\machine\midwayic.c

[Loopey1]

Thank You.