Seven-digit scoring on six-digit displays for green-ROM games

Games with green flipper ROMs can use a modified flipper ROM 2 at IC17 that divides every score by ten. The stock six-digit displays then show what is effectively a seven-digit score, so high scores stop rolling over. It needs one 2716.

Systems

• Williams System 6 / 6A

Games

• Firepower
• Gorgar
• Laser Ball
• Scorpion
• Time Warp
• Tri Zone

Related tips

• Run Firepower on a System 7 CPU board
• Flipper ROMs at IC17 and IC20: replace the originals with new EPROMs
• System 4, 6 and 7 boards: one 2716 at IC14 replaces the three game PROMs
• Leon's test EPROM: what to burn and where it goes
• Garbled or partial sounds from bad ROMs or sockets
• Convert a System 3 CPU board to a single 2716 game EPROM at IC14
• System 7: the 2532 goes in IC17, the 2716 in IC20
• System 3/4 sound board jumpers for 7641 PROM vs 2716

Source: Repairing Williams System 3 to System 7 Pinball 1977 to 1984, Part Two, Clay Harrell (pinrepair.com)