Just a word of warning, I have found it difficult to close the application as it runs full screen and Ctrl+C doesn't work (I assume due to X windows).
Yup it corrupted my card! However, if running straight from Console Ctrl Alt Delete will reboot the RPi safely.
The NTSC console (JAP/UAS) did, the UK version however ran at 50 FPS due to the 50Hz Frequency PAL TV system (As did most consoles and computers using TV Modulators until the late 90's) and if the code wasn't optimised the Image wasn't fullscreen either due to having more scan lines* (it wasn't because they were Widescreen!).
* NTSC 525 (486 Visible) PAL 625 (576 Visible)