diff --git a/papers/format.md b/papers/format.md
index 8aa96b936..406a07c02 100644
--- a/papers/format.md
+++ b/papers/format.md
@@ -254,6 +254,7 @@ size | description
      |   - 0xde: YM2610B extended - 19 channels
      |   - 0xdf: YM2612 XGM extended - 13 channels (UNAVAILABLE)
      |   - 0xe0: QSound - 19 channels
+     |   - 0xe1: PS1 - 24 channels (UNAVAILABLE)
      |   - 0xf0: SID2 - 3 channels
      |   - 0xf1: 5E01 - 5 channels
      |   - 0xfc: Pong - 1 channel