diff --git a/papers/format.md b/papers/format.md
index e28a14773..f979ee2f7 100644
--- a/papers/format.md
+++ b/papers/format.md
@@ -239,11 +239,12 @@ size | description
      |   - 0xd2: Ensoniq ES5503 (hard pan) - 32 channels (UNAVAILABLE)
      |   - 0xd4: PowerNoise - 4 channels
      |   - 0xd5: Dave - 6 channels
-     |   - 0xd6: NDS - 16 channels (UNAVAILABLE)
-     |   - 0xd7: Game Boy Advance (direct) - 2 channels (UNAVAILABLE)
-     |   - 0xd8: Game Boy Advance (MinMod) - 16 channels (UNAVAILABLE)
+     |   - 0xd6: NDS - 16 channels
+     |   - 0xd7: Game Boy Advance (direct) - 2 channels
+     |   - 0xd8: Game Boy Advance (MinMod) - 16 channels
      |   - 0xde: YM2610B extended - 19 channels
      |   - 0xe0: QSound - 19 channels
+     |   - 0xf1: 5E01 - 5 channels
      |   - 0xfc: Pong - 1 channel
      |   - 0xfd: Dummy System - 8 channels
      |   - 0xfe: reserved for development
diff --git a/src/engine/dispatchContainer.cpp b/src/engine/dispatchContainer.cpp
index 8d4983c77..0a88e5407 100644
--- a/src/engine/dispatchContainer.cpp
+++ b/src/engine/dispatchContainer.cpp
@@ -310,6 +310,7 @@ void DivDispatchContainer::init(DivSystem sys, DivEngine* eng, int chanCount, do
       } else {
         ((DivPlatformNES*)dispatch)->setNSFPlay(eng->getConfInt("nesCore",0)==1);
       }
+      ((DivPlatformNES*)dispatch)->set5E01(false);
       break;
     case DIV_SYSTEM_C64_6581:
       dispatch=new DivPlatformC64;
@@ -673,6 +674,15 @@ void DivDispatchContainer::init(DivSystem sys, DivEngine* eng, int chanCount, do
     case DIV_SYSTEM_NDS:
       dispatch=new DivPlatformNDS;
       break;
+    case DIV_SYSTEM_5E01:
+      dispatch=new DivPlatformNES;
+      if (isRender) {
+        ((DivPlatformNES*)dispatch)->setNSFPlay(eng->getConfInt("nesCoreRender",0)==1);
+      } else {
+        ((DivPlatformNES*)dispatch)->setNSFPlay(eng->getConfInt("nesCore",0)==1);
+      }
+      ((DivPlatformNES*)dispatch)->set5E01(true);
+      break;
     case DIV_SYSTEM_DUMMY:
       dispatch=new DivPlatformDummy;
       break;
diff --git a/src/engine/fileOps/ftm.cpp b/src/engine/fileOps/ftm.cpp
index 781a1be17..dde258f98 100644
--- a/src/engine/fileOps/ftm.cpp
+++ b/src/engine/fileOps/ftm.cpp
@@ -723,8 +723,7 @@ bool DivEngine::loadFTM(unsigned char* file, size_t len, bool dnft, bool dnft_si
           }
         }
         if (expansions & 256) {
-          // TODO: change when 5E01 is added
-          ds.system[systemID++] = DIV_SYSTEM_NES;
+          ds.system[systemID++] = DIV_SYSTEM_5E01;
 
           for (int ch = 0; ch < 5; ch++) {
             map_channels[curr_chan] = map_ch;
diff --git a/src/engine/platform/nes.cpp b/src/engine/platform/nes.cpp
index c5993c624..d8dfba3d6 100644
--- a/src/engine/platform/nes.cpp
+++ b/src/engine/platform/nes.cpp
@@ -817,6 +817,10 @@ void DivPlatformNES::setNSFPlay(bool use) {
   useNP=use;
 }
 
+void DivPlatformNES::set5E01(bool use) {
+  isE=use;
+}
+
 unsigned char DivPlatformNES::readDMC(unsigned short addr) {
   return dpcmMem[(addr&0x3fff)|((dpcmBank&15)<<14)];
 }
diff --git a/src/engine/platform/nes.h b/src/engine/platform/nes.h
index a2c1ed8ab..aaebb4d84 100644
--- a/src/engine/platform/nes.h
+++ b/src/engine/platform/nes.h
@@ -62,6 +62,7 @@ class DivPlatformNES: public DivDispatch {
   bool useNP;
   bool goingToLoop;
   bool countMode;
+  bool isE;
   struct NESAPU* nes;
   xgm::NES_APU* nes1_NP;
   xgm::NES_DMC* nes2_NP;
@@ -93,6 +94,7 @@ class DivPlatformNES: public DivDispatch {
     float getPostAmp();
     unsigned char readDMC(unsigned short addr);
     void setNSFPlay(bool use);
+    void set5E01(bool use);
     void setFlags(const DivConfig& flags);
     void notifyInsDeletion(void* ins);
     void poke(unsigned int addr, unsigned short val);
diff --git a/src/engine/song.h b/src/engine/song.h
index f9ebc0c62..f9983ba9e 100644
--- a/src/engine/song.h
+++ b/src/engine/song.h
@@ -138,6 +138,7 @@ enum DivSystem {
   DIV_SYSTEM_NDS,
   DIV_SYSTEM_GBA_DMA,
   DIV_SYSTEM_GBA_MINMOD,
+  DIV_SYSTEM_5E01,
 };
 
 enum DivEffectType: unsigned short {
diff --git a/src/engine/sysDef.cpp b/src/engine/sysDef.cpp
index 3f0b0c2e2..e3cbc2c94 100644
--- a/src/engine/sysDef.cpp
+++ b/src/engine/sysDef.cpp
@@ -2069,6 +2069,28 @@ void DivEngine::registerSystems() {
     }
   );
 
+  sysDefs[DIV_SYSTEM_5E01]=new DivSysDef(
+    "5E01", NULL, 0xf1, 0, 5, false, true, 0x161, false, (1U<<DIV_SAMPLE_DEPTH_1BIT_DPCM)|(1U<<DIV_SAMPLE_DEPTH_8BIT), 0, 0,
+    "a fantasy sound chip created by Euly. it is based on Ricoh 2A03, adding a couple features such as 32 noise pitches, an extra duty cycle, and three waveforms (besides triangle).",
+    {"Pulse 1", "Pulse 2", "Wave", "Noise", "DPCM"},
+    {"S1", "S2", "WA", "NO", "DMC"},
+    {DIV_CH_PULSE, DIV_CH_PULSE, DIV_CH_WAVE, DIV_CH_NOISE, DIV_CH_PCM},
+    {DIV_INS_NES, DIV_INS_NES, DIV_INS_NES, DIV_INS_NES, DIV_INS_NES},
+    {DIV_INS_NULL, DIV_INS_NULL, DIV_INS_NULL, DIV_INS_NULL, DIV_INS_AMIGA},
+    {
+      {0x11, {DIV_CMD_NES_DMC, "11xx: Write to delta modulation counter (0 to 7F)"}},
+      {0x12, {DIV_CMD_STD_NOISE_MODE, "12xx: Set duty cycle/noise mode/waveform (pulse/wave: 0 to 3; noise: 0 or 1)"}},
+      {0x13, {DIV_CMD_NES_SWEEP, "13xy: Sweep up (x: time; y: shift)",constVal<0>,effectVal}},
+      {0x14, {DIV_CMD_NES_SWEEP, "14xy: Sweep down (x: time; y: shift)",constVal<1>,effectVal}},
+      {0x15, {DIV_CMD_NES_ENV_MODE, "15xx: Set envelope mode (0: envelope, 1: length, 2: looping, 3: constant)"}},
+      {0x16, {DIV_CMD_NES_LENGTH, "16xx: Set length counter (refer to manual for a list of values)"}},
+      {0x17, {DIV_CMD_NES_COUNT_MODE, "17xx: Set frame counter mode (0: 4-step, 1: 5-step)"}},
+      {0x18, {DIV_CMD_SAMPLE_MODE, "18xx: Select PCM/DPCM mode (0: PCM; 1: DPCM)"}},
+      {0x19, {DIV_CMD_NES_LINEAR_LENGTH, "19xx: Set triangle linear counter (0 to 7F; 80 and higher halt)"}},
+      {0x20, {DIV_CMD_SAMPLE_FREQ, "20xx: Set DPCM frequency (0 to F)"}}
+    }
+  );
+
   sysDefs[DIV_SYSTEM_DUMMY]=new DivSysDef(
     "Dummy System", NULL, 0xfd, 0, 8, false, true, 0, false, 0, 0, 0,
     "this is a system designed for testing purposes.",
diff --git a/src/gui/guiConst.cpp b/src/gui/guiConst.cpp
index b1734caf1..aee901f4d 100644
--- a/src/gui/guiConst.cpp
+++ b/src/gui/guiConst.cpp
@@ -1243,6 +1243,7 @@ const int availableSystems[]={
   DIV_SYSTEM_POWERNOISE,
   DIV_SYSTEM_DAVE,
   DIV_SYSTEM_NDS,
+  DIV_SYSTEM_5E01,
   0 // don't remove this last one!
 };
 
@@ -1335,6 +1336,7 @@ const int chipsSpecial[]={
   DIV_SYSTEM_POWERNOISE,
   DIV_SYSTEM_DAVE,
   DIV_SYSTEM_NDS,
+  DIV_SYSTEM_5E01,
   0 // don't remove this last one!
 };