diff --git a/src/engine/instrument.h b/src/engine/instrument.h
index 5c3882e3b..01323d90f 100644
--- a/src/engine/instrument.h
+++ b/src/engine/instrument.h
@@ -60,8 +60,8 @@ enum DivInstrumentType: unsigned short {
   DIV_INS_SU=30,
   DIV_INS_NAMCO=31,
   DIV_INS_OPL_DRUMS=32,
-  //33
-  //34
+  DIV_INS_OPM=33,
+  DIV_INS_NES=34,
   DIV_INS_MSM6258=35,
   DIV_INS_MSM6295=36,
   DIV_INS_ADPCMA=37,
diff --git a/src/gui/dataList.cpp b/src/gui/dataList.cpp
index e25f504dc..2a1c7a66a 100644
--- a/src/gui/dataList.cpp
+++ b/src/gui/dataList.cpp
@@ -338,6 +338,14 @@ void FurnaceGUI::drawInsList(bool asChild) {
               ImGui::PushStyleColor(ImGuiCol_Text,uiColors[GUI_COLOR_INSTR_OPL_DRUMS]);
               name=fmt::sprintf(ICON_FA_COFFEE " %.2X: %s##_INS%d",i,ins->name,i);
               break;
+            case DIV_INS_OPM:
+              ImGui::PushStyleColor(ImGuiCol_Text,uiColors[GUI_COLOR_INSTR_OPM]);
+              name=fmt::sprintf(ICON_FA_AREA_CHART " %.2X: %s##_INS%d",i,ins->name,i);
+              break;
+            case DIV_INS_NES:
+              ImGui::PushStyleColor(ImGuiCol_Text,uiColors[GUI_COLOR_INSTR_NES]);
+              name=fmt::sprintf(ICON_FA_GAMEPAD " %.2X: %s##_INS%d",i,ins->name,i);
+              break;
             case DIV_INS_MSM6258:
               ImGui::PushStyleColor(ImGuiCol_Text,uiColors[GUI_COLOR_INSTR_MSM6258]);
               name=fmt::sprintf(ICON_FA_VOLUME_UP " %.2X: %s##_INS%d",i,ins->name,i);
diff --git a/src/gui/gui.h b/src/gui/gui.h
index cb481f122..7f9c5924a 100644
--- a/src/gui/gui.h
+++ b/src/gui/gui.h
@@ -159,6 +159,8 @@ enum FurnaceGUIColors {
   GUI_COLOR_INSTR_SU,
   GUI_COLOR_INSTR_NAMCO,
   GUI_COLOR_INSTR_OPL_DRUMS,
+  GUI_COLOR_INSTR_OPM,
+  GUI_COLOR_INSTR_NES,
   GUI_COLOR_INSTR_MSM6258,
   GUI_COLOR_INSTR_MSM6295,
   GUI_COLOR_INSTR_ADPCMA,
diff --git a/src/gui/guiConst.cpp b/src/gui/guiConst.cpp
index 1827eb1a4..1ce78b5fa 100644
--- a/src/gui/guiConst.cpp
+++ b/src/gui/guiConst.cpp
@@ -80,8 +80,8 @@ const int vgmVersions[6]={
 };
 
 const char* insTypes[DIV_INS_MAX+1]={
-  "Standard (SMS/NES)",
-  "FM (4-operator)",
+  "SN76489/Sega PSG",
+  "FM (OPN)",
   "Game Boy",
   "C64",
   "Generic Sample",
@@ -113,8 +113,8 @@ const char* insTypes[DIV_INS_MAX+1]={
   "Sound Unit",
   "Namco WSG",
   "OPL (drums)",
-  "Reserved", // 33
-  "Reserved", // 34
+  "FM (OPM)", // 33
+  "NES", // 34
   "MSM6258",
   "MSM6295",
   "ADPCM-A",
@@ -788,6 +788,8 @@ const FurnaceGUIColorDef guiColors[GUI_COLOR_MAX]={
   D(GUI_COLOR_INSTR_SU,"",ImVec4(0.95f,0.98f,1.0f,1.0f)),
   D(GUI_COLOR_INSTR_NAMCO,"",ImVec4(1.0f,1.0f,0.0f,1.0f)),
   D(GUI_COLOR_INSTR_OPL_DRUMS,"",ImVec4(0.3f,1.0f,0.9f,1.0f)),
+  D(GUI_COLOR_INSTR_OPM,"",ImVec4(0.2f,0.6f,1.0f,1.0f)),
+  D(GUI_COLOR_INSTR_NES,"",ImVec4(0.4f,1.0f,0.3f,1.0f)),
   D(GUI_COLOR_INSTR_MSM6258,"",ImVec4(1.0f,0.5f,0.5f,1.0f)),
   D(GUI_COLOR_INSTR_MSM6295,"",ImVec4(1.0f,0.5f,0.5f,1.0f)),
   D(GUI_COLOR_INSTR_ADPCMA,"",ImVec4(1.0f,0.5f,0.5f,1.0f)),
diff --git a/src/gui/settings.cpp b/src/gui/settings.cpp
index 14ade83bd..4e292879b 100644
--- a/src/gui/settings.cpp
+++ b/src/gui/settings.cpp
@@ -1636,8 +1636,8 @@ void FurnaceGUI::drawSettings() {
               ImGui::TreePop();
             }
             if (ImGui::TreeNode("Instrument Types")) {
-              UI_COLOR_CONFIG(GUI_COLOR_INSTR_FM,"FM (4-operator)");
-              UI_COLOR_CONFIG(GUI_COLOR_INSTR_STD,"Standard");
+              UI_COLOR_CONFIG(GUI_COLOR_INSTR_FM,"FM (OPN)");
+              UI_COLOR_CONFIG(GUI_COLOR_INSTR_STD,"SN76489/Sega PSG");
               UI_COLOR_CONFIG(GUI_COLOR_INSTR_GB,"Game Boy");
               UI_COLOR_CONFIG(GUI_COLOR_INSTR_C64,"C64");
               UI_COLOR_CONFIG(GUI_COLOR_INSTR_AMIGA,"Amiga/Generic Sample");
@@ -1673,6 +1673,8 @@ void FurnaceGUI::drawSettings() {
               UI_COLOR_CONFIG(GUI_COLOR_INSTR_SU,"Sound Unit");
               UI_COLOR_CONFIG(GUI_COLOR_INSTR_NAMCO,"Namco WSG");
               UI_COLOR_CONFIG(GUI_COLOR_INSTR_OPL_DRUMS,"FM (OPL Drums)");
+              UI_COLOR_CONFIG(GUI_COLOR_INSTR_OPM,"FM (OPM)");
+              UI_COLOR_CONFIG(GUI_COLOR_INSTR_NES,"NES");
               UI_COLOR_CONFIG(GUI_COLOR_INSTR_MSM6258,"MSM6258");
               UI_COLOR_CONFIG(GUI_COLOR_INSTR_MSM6295,"MSM6295");
               UI_COLOR_CONFIG(GUI_COLOR_INSTR_ADPCMA,"ADPCM-A");