The D-11581 sound board: chips and ROMs
D-11581 uses a 68B09E CPU, YM2151/YM3012 FM synthesizer, an MC1408 DAC and a 55536 CVSD speech chip. U4 holds the sound operating system and music; U21 and U22 hold speech and samples. Spares turn up from Williams video games of the late 1980s that share this board, such as Smash TV, Trog, Arch Rivals, Strike Force and High Impact.
Systems
Related tips
- Which System 11 sound board each game uses
- How System 11 makes sound
- Power-on sound tones and what they mean
- D-11297, D-11298 and D-12338 sound boards
- Replacing the obsolete 55536 speech chip
- Sound circuits on the 11A and 11B CPU boards
- CPU sound diagnostic switch SW1 results
- Game-over music missing: reflow the sound board header pins
Source: Repairing Williams System 11 Pinball 1986 to 1990, Part Two, Clay Harrell (pinrepair.com)