Thanks. I'm glad to say it looks like there are no unexpected issues with the emulation. I just had to tweak the MCU freq a bit. Also, the fact that the player led in the basketball game should be brighter, is a common(not unexpected) problem with these led handhelds.
*edit* New MAME will be out next wednesday as usual, with plenty new handhelds this time. If I go by youtube/google, the most known ones are Atari Touch Me, and GAF Melody Madness. and a cheesy commercial of MB Plus One
