double dragon, punchout small screens in MAME

[coinheaven]

is there any way to make the screen bigger for these games without affecting the newer games that take up the whole screen?  i tried adjusting the aspect ratio to make them bigger, but it always affected the newer games like MK 2, etc.  i saw a video and youtube where it took up the whole screen.  thanks

[Turnarcades]

Isn't there a setting in MAME that lets you choose which monitor you want to display? I'm sure there is a toggle for the Playchoice games as it works for games like Outrunners.