Chris Hibler
Resident of West St. Louis County, Missouri
Personal Pinball Site: https://chrishiblerpinball.com/
YouTube Channel: www.youtube.com/@ChrisHiblerPinball
YouTube data as of 7/6/2025 Joined Apr 30, 2016 2.68K subscribers 1,354 videos 481,545 views
I've been repairing pins since my first acquisition in 1991 (Gottlieb Centigrade 37). My collection of 60 or so games is split between Gottlieb EMs and a mix of solid state games.
Oldest game: 1962 Gottlieb Rack-A-Ball
Newest game: 2014 Ironman VE
Chris, blanking signal is actually a periodic signal I know you're in the process of editing, but it is an important distinction. Obviously it's high most of the time, but it dips low at least once every display interrupt (to clear the displays).
If only it worked as desired to prevent coil lockout (*sigh*)
-scott
Playground:
Using a SIMTEK STK12C68-SF45 in various manufacturer's boards Board modifications:
Sega or Stern -- the HSB pin number 26 needs to be removed.
Data East -- remove HSB pin number 26, and make a link between +5V and B+.
Williams -- some games use larger RAM circuits. To be able to use this NVRAM, add resistor 1.5k on R93, and remove O ohms resistor on W3.
https://pinside.com/pinball/forum/topic/nvram-adapters-16-free-shipping-not-mine
Why did you revert the edit to the caption on the sys80 page? Was it in place for a particular reason that I may have missed? --ForceFlow (talk) 17:42, 9 November 2016 (CST)
I rolled that back because either Palson or I put that in there to add a bit of levity. I like to insert an "easter egg" from time to time to make the document more readable. I was going to list the reason when I rolled it back but the darned roll back feature doesn't allow that. It just rolls the change back.
[Chris Hibler, 11/9/16, 6:29pm CST]
It wasn't me. Not my voice at all. That has Hibler written all over it. I RARELY add commentary.
--Jimpal (talk) 06:20, 10 November 2016 (CST)
I understand technical stuff can sometimes get dry and boring to read, but honestly, to me, it sounded like the writer was calling the reader stupid for not noticing the jumper wire in the photo. Since it wasn't written in a professional way, it seemed prudent to address it. --ForceFlow (talk) 13:33, 10 November 2016 (CST)
2 CPU vs. MPUChris, I saw that you changed post on the System 11 reset circuit from CPU to MPU.
I have always been curious about the difference. In pinball, I had always referenced the MPU in the early SS pins. But by WPC89, I had referenced the board as a CPU.
In Williams Sys 11, is it a MPU?
In the EE world, not necessarily relevant to our world, MPU is used completely differently:
"The MPU monitors transactions between the CPU and the memory and raises the alarm (triggers a fault exception) when an access violation is detected. "
https://www.eejournal.com/article/what-the-faq-are-cpus-mpus-mcus-and-gpus/
I don't care what is used. I was just wondering what the pinball world does and why.
BTW, the other editing you did was a distinct improvement. Thanks.
---7/6/25---
Response: That change was made for consistency. Throughout the Wiki, and in general, the processor board is the MPU. The MPU contains a CPU, be it 6800,68B09E or whatever. That's the only reason.
It's my old computer science background that makes this seem like the right nomenclature.
Thanks for the comments. I try to not change the intent of the writing but to "streamline" it into the same "look and feel". My old friend Jim Palson was a great foil/sounding board for this too. It's simply tragic that he lost his life at such an early age due to cancer.
Thanks for the help with the Wiki. Besides me, there aren't many authors providing content. I appreciate everyone who lends a hand.
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