diff --git a/src/gui/presets.cpp b/src/gui/presets.cpp
index ba7478553..16d69cf78 100644
--- a/src/gui/presets.cpp
+++ b/src/gui/presets.cpp
@@ -88,42 +88,6 @@ void FurnaceGUI::initSystemPresets() {
       0
     }
   ));
-  cat.systems.push_back(FurnaceGUISysDef(
-    "Yamaha YM3526", {
-      DIV_SYSTEM_OPL, 64, 0, 0,
-      0
-    }
-  ));
-  cat.systems.push_back(FurnaceGUISysDef(
-    "Yamaha YM3526 (drums mode)", {
-      DIV_SYSTEM_OPL_DRUMS, 64, 0, 0,
-      0
-    }
-  ));
-  cat.systems.push_back(FurnaceGUISysDef(
-    "Yamaha YM3812", {
-      DIV_SYSTEM_OPL2, 64, 0, 0,
-      0
-    }
-  ));
-  cat.systems.push_back(FurnaceGUISysDef(
-    "Yamaha YM3812 (drums mode)", {
-      DIV_SYSTEM_OPL2_DRUMS, 64, 0, 0,
-      0
-    }
-  ));
-  cat.systems.push_back(FurnaceGUISysDef(
-    "Yamaha YMF262", {
-      DIV_SYSTEM_OPL3, 64, 0, 0,
-      0
-    }
-  ));
-  cat.systems.push_back(FurnaceGUISysDef(
-    "Yamaha YMF262 (drums mode)", {
-      DIV_SYSTEM_OPL3_DRUMS, 64, 0, 0,
-      0
-    }
-  ));
   sysCategories.push_back(cat);
 
   cat=FurnaceGUISysCategory("Square");
@@ -323,6 +287,7 @@ void FurnaceGUI::initSystemPresets() {
       0
     }
   ));
+  /*
   cat.systems.push_back(FurnaceGUISysDef(
     "Commodore 64 (6581 SID + Sound Expander)", {
       DIV_SYSTEM_OPL, 64, 0, 0,
@@ -350,7 +315,7 @@ void FurnaceGUI::initSystemPresets() {
       DIV_SYSTEM_C64_8580, 64, 0, 1,
       0
     }
-  ));
+  ));*/
   cat.systems.push_back(FurnaceGUISysDef(
     "Amiga", {
       DIV_SYSTEM_AMIGA, 64, 0, 0,
@@ -474,22 +439,6 @@ void FurnaceGUI::initSystemPresets() {
       0
     }
   ));
-  cat.systems.push_back(FurnaceGUISysDef(
-    "PC + Sound Blaster Pro", {
-      DIV_SYSTEM_OPL2, 64, -127, 0,
-      DIV_SYSTEM_OPL2, 64, 127, 0,
-      DIV_SYSTEM_PCSPKR, 64, 0, 0,
-      0
-    }
-  ));
-  cat.systems.push_back(FurnaceGUISysDef(
-    "PC + Sound Blaster Pro (drums mode)", {
-      DIV_SYSTEM_OPL2_DRUMS, 64, -127, 0,
-      DIV_SYSTEM_OPL2_DRUMS, 64, 127, 0,
-      DIV_SYSTEM_PCSPKR, 64, 0, 0,
-      0
-    }
-  ));
   cat.systems.push_back(FurnaceGUISysDef(
     "PC + Sound Blaster Pro 2", {
       DIV_SYSTEM_OPL3, 64, 0, 0,
@@ -504,15 +453,6 @@ void FurnaceGUI::initSystemPresets() {
       0
     }
   ));
-  cat.systems.push_back(FurnaceGUISysDef(
-    "PC + SAAYM", {
-      DIV_SYSTEM_YM2151, 64, 0, 0, // 3.58MHz or 4MHz selectable via jumper
-      DIV_SYSTEM_SAA1099, 64, -127, 1, // 7.16MHz or 8MHz selectable via jumper
-      DIV_SYSTEM_SAA1099, 64, 127, 1, // ""
-      DIV_SYSTEM_PCSPKR, 64, 0, 0,
-      0
-    }
-  ));
   cat.systems.push_back(FurnaceGUISysDef(
     "Sharp X1", {
       DIV_SYSTEM_AY8910, 64, 0, 3,
@@ -601,13 +541,6 @@ void FurnaceGUI::initSystemPresets() {
       0
     }
   ));
-  cat.systems.push_back(FurnaceGUISysDef(
-    "Seta 1 + FM addon", {
-      DIV_SYSTEM_YM2612, 64, 0, 2, // Discrete YM3438
-      DIV_SYSTEM_X1_010, 64, 0, 0,
-      0
-    }
-  ));
   cat.systems.push_back(FurnaceGUISysDef(
     "Seta 2", {
       DIV_SYSTEM_X1_010, 64, 0, 1,