Reading audit 00: game number, flipper ROM version and software revision
In audit mode "04" in the credit window means audits and the ball-in-play window shows the audit number. For audit 00 the player 1 display shows the software ID: the first digit is the flipper ROM version (0 yellow, 1 green, 2 blue), the next three are the game number (497 is Firepower), and the last is the game software revision. A wrong first digit shows a game ROM and flipper ROM mismatch. In the same scheme 01 is lamp test, 02 solenoid test and 03 switch test.
Systems
Related tips
- Reading the software ID in audit 00
- Flash has yellow and green game ROM versions; match them to the flipper ROMs
- "Flipper ROMs" have nothing to do with the flippers
- Which System 3 to 7 games use which flipper ROM system
- Flipper ROM color codes by system
- Flipper ROMs at IC17 and IC20: replace the originals with new EPROMs
- Only Stellar Wars and Flash used yellow flipper ROMs
- Flipper ROM colour tells you the system generation
Source: Repairing Williams System 3 to System 7 Pinball 1977 to 1984, Part Two, Clay Harrell (pinrepair.com)