diff --git a/src/engine/instrument.h b/src/engine/instrument.h
index 90f0e2309..a470bea6d 100644
--- a/src/engine/instrument.h
+++ b/src/engine/instrument.h
@@ -89,8 +89,9 @@ enum DivInstrumentType: unsigned short {
   DIV_INS_POWERNOISE=56,
   DIV_INS_POWERNOISE_SLOPE=57,
   DIV_INS_DAVE=58,
-  DIV_INS_GBA_DMA=59,
-  DIV_INS_GBA_MINMOD=60,
+  DIV_INS_NDS=59,
+  DIV_INS_GBA_DMA=60,
+  DIV_INS_GBA_MINMOD=61,
   DIV_INS_MAX,
   DIV_INS_NULL
 };
diff --git a/src/engine/sysDef.cpp b/src/engine/sysDef.cpp
index 1cdcdfb70..edb9419ac 100644
--- a/src/engine/sysDef.cpp
+++ b/src/engine/sysDef.cpp
@@ -2026,7 +2026,7 @@ void DivEngine::registerSystems() {
   );
   
   sysDefs[DIV_SYSTEM_GBA_DMA]=new DivSysDef(
-    "Game Boy Advance DMA Sound", NULL, 0xfe, 0, 2, false, true, 0, false, 1U<<DIV_SAMPLE_DEPTH_8BIT, 0, 256,
+    "Game Boy Advance DMA Sound", NULL, 0xd7, 0, 2, false, true, 0, false, 1U<<DIV_SAMPLE_DEPTH_8BIT, 0, 256,
     "additional PCM FIFO channels in Game Boy Advance driven directly by its DMA hardware.",
     {"PCM 1", "PCM 2"},
     {"P1", "P2"},
@@ -2040,7 +2040,7 @@ void DivEngine::registerSystems() {
   );
 
   sysDefs[DIV_SYSTEM_GBA_MINMOD]=new DivSysDef(
-    "Game Boy Advance MinMod", NULL, 0xff, 0, 16, false, true, 0, false, 1U<<DIV_SAMPLE_DEPTH_8BIT, 0, 256,
+    "Game Boy Advance MinMod", NULL, 0xd8, 0, 16, false, true, 0, false, 1U<<DIV_SAMPLE_DEPTH_8BIT, 0, 256,
     "additional PCM FIFO channels in Game Boy Advance driven by software mixing to provide up to sixteen sample channels",
     {"Channel 1", "Channel 2", "Channel 3", "Channel 4", "Channel 5", "Channel 6", "Channel 7", "Channel 8", "Channel 9", "Channel 10", "Channel 11", "Channel 12", "Channel 13", "Channel 14", "Channel 15", "Channel 16"},
     {"1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12", "13", "14", "15", "16"},