Fourplay Multigame
This is a multi-game hack on a standard Galaxians PCB. It allows you to select from 4 different games on power-up or reset. It is not too tricky to install since all games use the same colour prom. Files needed and instructions to install this on your own PCB are printed below.
![](https://macros-arcade.com/wp-content/uploads/2023/01/multigal.png)
![](https://macros-arcade.com/wp-content/uploads/2023/01/mult0000.png)
![](https://macros-arcade.com/wp-content/uploads/2022/12/game6.png)
![](https://macros-arcade.com/wp-content/uploads/2023/01/mult0003.png)
![](https://macros-arcade.com/wp-content/uploads/2022/12/game15.png)
You first need to download these files and then follow these steps. All wire links can be made with signal wire, tidying up afterwards with spots of glue from a glue gun to hold the wires in place. (it’s best to complete installation and test it before doing this)
- Program fourplay.bin into a 27512 rom and graph1 and graph2 into 2732 roms
- Remove rom board and Graphics roms
- On a 28 pin socket (or the 27512 programmed earlier) bend out pins 1,2,20,22,23,26,27 and 28
- Insert socket (or rom) into socket 7F aligning pin 14 to original pin 12. Pins 1,2,27 and 28 will overhang the end.
- Connect links as follows
- Pin 28 to 7J pin 24 (+5v)
- Pin 2 to 7D pin 5 (A12)
- Pin 20 to 7J pin 12 (CE)
- Pin 22 to 8E pin 13 (OE)
- Pin 23 to 7D pin 3 (A11)
- Pin 26 to 7D pin 7 (A13)
- Pin 27 to 9N pin 6 (A14) Switched by Menu
- Pin 1 to 9N pin 7 (A15) Switched by Menu
- Bend up pin 21 on both graphics roms
- Insert graph1 in 1H, graph2 into 1L
- Connect pin 21 of each graphic rom to 9M pin 4
If all this has been done sucessfully, then power-up should give you a menu listing the 4 available games. Select which game you wish to play using left and right, press fire to start the game.
If you wish to add a button to return you to the menu, then you can extend the on-board reset button to an unused button in the harness, or add an extra button.