> There's something weird I noticed about Freedom Fighter on Star Rider hardware, > actually. The game mostly uses sampled sound effects with some occasional typical PSG > ones (like when you enter one of the three doors after taking out a tank). Does the > hardware even have any dedicated sample playback hardware? I'm pretty sure Star Rider > never did anything like that.
Star Rider has no PSG. The sound board has a 6809 driving two DACs via 32*8 FIFOs. The playback rate is controlled by a PTM.