User:Pincoder
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I have created "in game" test ROMs for williams system 6. I've written some ROMs for Williams System 3, 4, 6 pinball machines games that are very simple to use, and can be used in-game, so you don't need any test fixtures.
Install and power up each ROM in order to quickly help you identify problems with your entire machine.
System 6 games:
Tri Zone Time Warp Gorgar Laser Ball FirePower Blackout Scorpion Algar Alien Poker
System 4 games:
Pokerino Phoenix Flash Stellar Wars
System 3 games:
Hot Tip Lucky Seven World Cup Contact Disco Fever
They are 2716 (2K) ROMs and can also be used in a 2816 EEPROM.
You can get them all in a single zip file here: [1]