diff --git a/papers/format.md b/papers/format.md
index 895cc41e..cdbf5708 100644
--- a/papers/format.md
+++ b/papers/format.md
@@ -284,6 +284,7 @@ size | description
      |   - 0xc5: YM2610B CSM - 20 channels
      |   - 0xc6: K007232 - 2 channels
      |   - 0xc7: GA20 - 4 channels
+     |   - 0xc8: SM8521 - 3 channels
      |   - 0xde: YM2610B extended - 19 channels
      |   - 0xe0: QSound - 19 channels
      |   - 0xfc: Pong - 1 channel
diff --git a/papers/newIns.md b/papers/newIns.md
index 31dff219..5a328c96 100644
--- a/papers/newIns.md
+++ b/papers/newIns.md
@@ -115,6 +115,7 @@ the following instrument types are available:
 - 45: K007232
 - 46: GA20
 - 47: Pokémon Mini
+- 48: SM8521
 
 the following feature codes are recognized:
 
diff --git a/src/engine/sysDef.cpp b/src/engine/sysDef.cpp
index b05ee5de..fe7606e0 100644
--- a/src/engine/sysDef.cpp
+++ b/src/engine/sysDef.cpp
@@ -1824,9 +1824,9 @@ void DivEngine::registerSystems() {
 
   sysDefs[DIV_SYSTEM_SM8521]=new DivSysDef(
     "Sharp SM8521", NULL, 0xc8, 0, 3, false, true, 0, false, 0,
-    "a SoC with wavetable sound hardware",
+    "a SoC with wavetable sound hardware.",
     {"Channel 1", "Channel 2", "Noise"},
-    {"CH1", "CH2", "NOI"},
+    {"CH1", "CH2", "NS"},
     {DIV_CH_WAVE, DIV_CH_WAVE, DIV_CH_NOISE},
     {DIV_INS_SM8521, DIV_INS_SM8521, DIV_INS_SM8521},
     {},