Vertical Games in a cocktail mode not going vertical

[j_infamous]

Games like pac man and 1942 are displaying as horizontal and not vertical. I am using a 1080 hdtv and a pi4. Any help would be excellent! Thank you in advance.

[mitu]

@j_infamous Please add more info about your system, as detailed in https://retropie.org.uk/forum/topic/3/read-this-first.
What emulator are you using ?

[j_infamous]

Pi Model or other hardware: 4gb 4b
Power Supply used: canakit one
RetroPie Version Used 4.6 i believe
Built From: retropie site

Using mame2003 with the 0.78 set.

[mitu]

Cocktail mode doesn't rotate the screen, it will flip it when alternating between players. Have you rotated you display and expected that cocktail mode would also rotate the video ?

[dankcushions]

https://retropie.github.io/RetroPie-Docs/lr-mame2003/#tate-mode may be of use