Fitting the combined 2764 to a System 6 CPU board
Steps
- Prepare and seat the 2764 as for a System 3/4 board (pins 2, 22, 23 bent up; pins 1, 26, 27, 28 joined; pin 14 into socket pin 12).
- Remove IC15.
- Wire pins 2, 22 and 23 to IC15 holes 3, 1 and 2 respectively.
- The example uses socket IC17 with the wires taken through a small hole near IC15.
Systems
Related tips
- Identifying a System 3 to 7 CPU board
- What changed on the System 6A CPU board
- System 6 CPU board test points
- System 6 CPU board jumpers J1 to J6
- A System 7 CPU board can run any System 3 to 7 game
- Run a System 6/7 CPU board on +5 V only
- Which CPU boards can run which system firmware
- Obsolete chips on System 3 to 7 CPU boards
Source: Use any Williams 3/4 or type 6 board for any pinball from this series (2764 EPROM remapping)