Help!!

[Q*Bert_OP]

Why are my vertical games running squashed vertically???

The horizontal ones are running perfectly.

***EDIT***

I'm using Mame

[AlanS17]

How squashed are they? Are the filling the screen horizontally?

[Q*Bert_OP]

The monitor is positioned horizontally, the games fill the screen completely horizontally, but are squashed to about 1/3 of the screen size, and display sideways so even if they weren't squashed you would have to turn the monitor....

[NinjaEpisode]

sounds like a rotation issue.

This probably isn't exactly what's wrong but a place to start:

From mame.faq:

W05. All the games appear sideways on the screen (ie. rotated by 90 degrees). 

This commonly occurs with certain Intel onboard graphics chipsets, often in conjunction with LCD monitors. Also, some Gateway, Dell, and other brands of laptops also may experience this issue.
This bug is not a problem with MAME, but a feature of this video chipset. To fix it, you either specify a resolution to use (i.e. add -640x480, -800x600, -1024x768, etc to the command line), enable hardware stretch, and Keep Aspect Ratio. The other workaround is to enter your Windows display control panel, click on "Settings", click on "Advanced" and search for an autorotate option, and disable it.

If you have Intel onboard video, also try updating the display drivers. Alternatively get a real video card.
 
 

[AlanS17]

But he said horizontal games work. Still, specifying a resolution and maintain aspect ratio is a good start.