On games that use the keyboard LED's, if the LED's are flashing, the keyboard inputs become unstable. For instance, when scrolling through the in-game menu, if the LED's are flashing (after inserting coins), for moments, key presses are not registered.
At first I thought it was the I-Pac, but I connected the keyboard directly to the PC and still get the exact same problem.
Is this a MAME, keyboard or motherboard issue?
Thanks.