The restoration of a 1980's Williams Defender arcade machine
Testing: Building a sound board test rig (part 2 – with video :-) )
So we have the sound board correctly powered with +5V, +12V and -5V, speaker connected and volume control turned up, so the final task is to simulate sound triggering from the CPU by grounding some of the input pins on IOJ3 (top right of sound board) from 2 to 8 (1 is key and 9 is not used according to the schematics)
Here’s how it works 🙂
| Print article | This entry was posted by Judder on April 22, 2014 at 11:42 am, and is filed under The Boards, Williams Defender restoration. Follow any responses to this post through RSS 2.0. You can skip to the end and leave a response. Pinging is currently not allowed. |
about 4 years ago
Do you know where I can find information on how the D8224 is programmed and produces sound. I am working on a Joust project and am curious about producing all of the sounds created by the board by the games it was used in.