If you are here, it’s probably because your old EPROM labels are unreadable or missing and you want to know what version you are running to determine if you want to upgrade.
Most modern DMD games are great, as they tell you at boot up what version of CPU/Display your are running, or even with a self explanatory menu it can be found somewhat easliy.
But what about those older System 11 games with the older displays?
Sound roms are still easy…Normally you do not need sound roms unless you are having sound issues.
However, the latest CPU code is always recommended even if “working properly” as it fixes bugs, scoring, or even safety issues etc. When the specific information on what was changed is available from Bally/Williams, it is usually in a readme file in the rom archive, and I will paste it in the listing. Sometimes, unfortunately more often than not, the info is very scarce for these old games and not available.
System 9’s aren’t as easy to just power them on and get your version like new machines, but here’s how, you can check the version in the test mode:
System 9 Version Test Procedure:
System 9 games have the software revision identified with an “L” to signify the Level of software release. To see what version your game is running, set your test switch to AUTO/UP and press ADVANCE while in Game Over mode. You will see “2GGG” in the player 1 display, where GGG is the game number. The player 2 display will show the number of the installed game revision.