I maybe looking to buy an system 9 MPU board if there is to much battery damage. Where can I find one now days?
(Topic ID: 293134)
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Thank you for all the info. I was hoping that Rottendog was not the only manufacturer, but it is great news that dumbass has one in the works. I got lucky and the board had no battery damage to it. I was afraid that it would since it had been setting in a basement for a long number of years.
Quoted from DumbAss:I have this board in the CAD software. It's about 50% complete. I haven't been able to make any progress since 2021-02-26 according to the date modified on the files. So that's about two months. I've been building boards and those take priority. I still have outstanding builds so this board is going to have to wait.
You can use a System 11 (nothing) CPU board. The address map is compatible. You will need to prepare the game and speech/sound ROMs in a specific way to meet the compatibility requirements for use on the System 11 CPU board.
The process is documented in the PinWiki @ https://www.pinwiki.com/wiki/index.php?title=Williams_System_9_-_11#Converting_the_System_9_ROM_Images_to_work_in_a_System_11_MPU if you want more information. I, personally, haven't tried it but the command sequence matches expectations based on the address decode and address map.
I make a reproduction System 11 CPU board and Pinball Life carries the Rottendog MPU9211 if you're looking for the Rottendog board.
This is great to know, it opens up a lot of options.
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