WPC / WPC89 CPU Jumper Settings
This page describes the procedure for rejumpering an early WPC CPU board to accept larger eproms used in later games and software revisions.
It is most commonly needed for Funhouse (Versions above vL-5) and Bride Of Pinbot (vL-7), but may be needed for other games.
The W1 and W2 jumpers are right next to the U6 CPU chip. (Circled in Red)
Re-jumpering a CPU board means using a soldering iron on an expensive and delicate circuit board. Any actions performed with this information is done so at your own risk. I cannot be held responsible. If you don’t know what you’re doing, hire someone that does! Many board repair people will not work on a board if you have tried yourself and damaged it. You will then have to find someone else or buy a new board.
If you are not experienced with PCB repairs, you may NOT want to learn on expensive to replace pinball machine boards. Alot of the components and traces are easily damaged by heat and tool slips. They are also sensitive to electrostatic discharge (ESD). Grounding yourself and tools is recommended.
This table refers to how your CPU board must be jumpered to read the software you have installed correctly depending on the EEPROM size.
| U6 ROM Size: | W1 | W2 |
| 1M / 2M / 4M ROM (Shown in YELLOW position below) | In | Out |
| 512K / 1M ROM (Shown in RED position below) | Out | In |
This picture highlights the 2 different positions for the W1/W2 jumper. DO NOT INSTALL BOTH AT THE SAME TIME!
This example below is a Bride Of Pinbot jumpered with W2 Installed which will only run version L6 and lower.
