Ok guys, they told me Mister was accurate to my pcb's... they lied.
Bubble bobble original pcb with Japanese rom, identical to the one running on mister. The PCB runs 11 seconds faster than Mister over 30 minutes. After 30 minutes of running the games when they are started at identical times, the original pcb ends up around 11 seconds ahead at the 30 minute runtime point. Unacceptable trash.
These are both running on Namco Exceleena cabs, same internal wiring power supplies, Nanao ms9 chassis and tubes. So it's good for comparison purposes.
For real though, that actually happens. They go out of synch by approx 11 seconds over 30 minutes. Gotta say though, you would NEVER tell the two apart to look at. There's just no way you could. Also, on stage 10 if you have all 3 powerups (fast shoot, long shoot and boots) on the original pcb if you fall through the roof and just start shooting bubbles as fast as you can, you can bring this stage to a fair crawl speed wise on the original pcb.... it's identical between mister and the pcb. You can trigger this exact same slowdown on both. I was curious how mister would replicate the slowdown on this stage compared to the original pcb.... it replicates it!
There's a bunch more other stuff I'll test out over the weekend side by side with original boards, a few more things like that where i know i can trigger slowdowns in games and various little oddities.
One thing I was really curious about was if Ghost n Goblins had the blue flash screens in it. I haven't been able to trigger it yet.. Pretty much all GNG boards have this blue flash, i've never seen one that doesn't, so i was just curious if it was replicated in mister. It appears it isn't. Small thing!
https://forums.arcade-museum.com/threads/ghosts-n-goblins-flashes-on-screen.179981/
Anyways, more testing on the weekend jut because i can.