Run Firepower on a System 7 CPU board

Steps

• Burn a 2532 holding both green flipper ROM images and fit it at IC17.
• Burn a 2716 holding the three original 512-byte PROMs (IC21+IC22+IC26 code) and fit it at IC14.
• Burn the original System 6 IC14 Firepower code into a 2716 and fit it at IC20.
• No jumper changes are needed as long as the System 7 board is set up for a standard game, not Hyperball or Defender.

Systems

• Williams System 7
• Williams System 6 / 6A

Games

• Firepower

Related tips

• System 7: the 2532 goes in IC17, the 2716 in IC20
• Leon's test EPROM: what to burn and where it goes
• Garbled or partial sounds from bad ROMs or sockets
• Seven-digit scoring on six-digit displays for green-ROM games
• System 4, 6 and 7 boards: one 2716 at IC14 replaces the three game PROMs
• Undo the Firepower 2732 change on a System 6 CPU board
• Flipper ROMs at IC17 and IC20: replace the originals with new EPROMs
• Firepower original ROM layout and jumpers

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