Setup Mame to mimic Arcade 1up Cocktail Mode (Smaller Screen for Player Not Playing)

[HyperFighting]

Hi Guys,

I noticed that "Ghouls and Ghosts" and "Strider" on the Arcade 1up Tabletop have an interesting way of handling split screen.
1 of the 2 screens is always slightly smaller than the other.
The player not playing has a smaller screen.

EX:

-Player 1 dies then Player 2 is allowed to play.
-Player 1's screen is scaled to be slightly smaller than player 2's screen.

-When Player 2 dies the Player 2 screen becomes scaled down slightly and Player 1 is enlarged!

I find this functionality ideal because instead of having two identical screens the player not playing has a slightly smaller screen.
I think this is a good visual aid to indicate who is playing and who is not.

I assume because 'gng' and 'strider' have cocktail modes in the dip settings.
The flag that flips the screen when Player 1/2 is playing must have something to do with how the screens are flagged to scale?

I am hoping to mimic this behavior via mame but I have been unsuccessful up to this point.
Does anyone have any ideas?

Many thanks!