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System 11 Game MPU Board Revisions
NOTICE: For some very important information, please read the Technical Article Notice and Disclaimer, found on our Technical Articles Index page before performing any of the work described below. The information given below assumes you have read the Notice and Disclaimer first.
CONTACTING US: (Please Read)
- Parts & Supplies: Free free to call or e-mail us if you have any questions about parts that we sell which are mentioned in any of the Technical Articles on our site.
- Technical Help & Questions:
- E-mail and Phone Help: We do not provide any technical help by phone or e-mail, unless you bought your game directly from our shop. If you did not, we cannot help you- please do not contact us. We simply do not have the time or resources to provide technical assistance by e-mail or phone for games that did not come directly from our shop. Instead, please see the section below on "Do It Yourself" for further help.
- Pinball Repair: If you have a game that you need serviced or repaired, please see our Game Service & Repair page for further info.
- Do-It-Yourself: For information on working on your own game, you can browse online repair guides such as www.homepinballrepairs.com, www.pinrepairs.com or www.pinrepair.com.
Four revisions of the System 11 MPU board (1986-1990) were used in the games made during this time. These were System 11, System 11A, 11B, and 11C. Not all System 11 boards are interchangeable between the different games, but some are.
The chart below shows which board was originally used with each game.
System 11 boards have all the circuitry on them that the later boards used, with the exception of the 3 LED's to the right of the battery holder- this is a 7-segment LED "digit" on System 11 games, but still works fine in the later games that this board is compatible with. System 11 boards also have some extra circuitry that uses the top left corner 4-pin connector for some of the speakers. Some/all later System 11 boards may not use this.
System 11A boards: No notes at this time.
System 11B boards use 3 separate LEDs for board diagnostics, instead of the earlier 7-segment display digit. They also do not have the speaker circuitry and 4-pin connector in upper left corner, as used by System 11 games.
System 11C boards do not have the speaker circuitry or connector in upper left corner, nor any of the speech processing circuitry in the upper left section of the board- this area is left unpopulated, and sounds/speech in these games are controlled entirely via the background sound board, mounted above the MPU board in the backbox.
Some compatibilities between versions:
These notes should not be considered complete or completely reliable, so if you have any corrections or any additional information to add, just let us know, and we'd be glad to add it here.
- System 11 boards can be used for System 11, 11A, and 11B boards. For example, we have successfully used a Road Kings board (11) in a Black Knight 2000 game (11B).
- System 11A boards can be used for System 11 and 11A games.
- System 11B boards can be used for Systems 11A, 11B, and 11C.
|Tic Tac Strike||11A|
|Swords of Fury||11B|
|Black Knight 2000||11B|
|Shuffle Inn Deluxe||11B|
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