Recently had a customer ask about the incompatibility I list with the MPU-200 NVRAM when used with Meteor. Got me looking again at what info was out there for this game and to see if there were any updates on what AFAIK are isolated cases of people having issues with using NVRAM on these boards.
1. Some people (not all) have reported installing NVRAM on Meteor caused the sounds to be "noticeably different" (esp the spinner).
2. Upgrading the game to EPROMs fixes the issue for some people (not all).
I hadn't really thought of Meteor being *THE* first MPU-200 game (1979). At least according to IPDB, it's game #113 (for reference, game #112 was Hot Hand). This right here tipped me off of a possible code or hardware issue related to it being the first game using the new board.
Then I see these threads about a bugfix for MPU getting bogged down, loop of counting the bonus 255 times..
And finally, dothedoo even mentions a problem with Zeropower NVRAM on an Alltek causing issues with spinner sound... which seems to be the same type of issues being reported with the MPU-200 NVRAM (or individual 5101 NVRAM Modules used at U8/U13).
Seeing as how a spinner sound issue is mentioned with Alltek + Zeropower, it has me wondering if the bugfix rom IS THE FIX for the MPU-200 NVRAM "incompatibility".
Can those with a METEOR and experience with this whole sound issue and/or bugfix code chime in?
If you had a sound issue when using NVRAM, was it fixed using EPROMs & if so, did you use the newer bugfix code?
If this has been addressed anywhere, let me know. I just thought I'd throw together a full discussion on it and even if the bugfix ROM isn't the solution for MPU-200 NVRAM compatibility, maybe we can see how widespread sound issues are. I've heard some people have upgraded Meteor to NVRAM without a problem.
http://www.pinitech.com - "Pinball Inspired Technology"
NVRAM, Bally/Stern LED Displays & Mods for pinball machines