Museum of the Game® & International Arcade Museum® Forums

trying to troubleshoot a watchdogging of an asteroids in the vg side and need some knowledge. with pin 1 lifted of l6 I get a blind running game. connecting it back up I look at my scope and the dmago stays high. I never see it go low. how does the cpu know there is a halt signal that is making it watchdog because the timer is not getting reset. interesting thing though my logic probe says dmago is pulsing but the scope says not even close. can't figure that one out. nor do I know where m10 is on schematics trying to figure out of that is causing the cpu to pause acording to notes on schematics