add Power Noise support

src/engine/dispatch.h

@@ -248,6 +248,9 @@ enum DivDispatchCmds {
   DIV_CMD_ESFM_MODIN, // (op, value)
   DIV_CMD_ESFM_ENV_DELAY, // (op, value)
 
+  DIV_CMD_POWER_NOISE_COUNTER_LOAD, // (which, val)
+  DIV_CMD_POWER_NOISE_IO_WRITE, // (port, value)
+
   DIV_CMD_MACRO_RESTART, // (which)
 
   DIV_CMD_MAX

src/engine/dispatchContainer.cpp

@@ -83,6 +83,7 @@
 #include "platform/c140.h"
 #include "platform/pcmdac.h"
 #include "platform/esfm.h"
+#include "platform/powernoise.h"
 #include "platform/dummy.h"
 #include "../ta-log.h"
 #include "song.h"
@@ -648,6 +649,9 @@ void DivDispatchContainer::init(DivSystem sys, DivEngine* eng, int chanCount, do
     case DIV_SYSTEM_ESFM:
       dispatch=new DivPlatformESFM;
       break;
+    case DIV_SYSTEM_POWER_NOISE:
+      dispatch=new DivPlatformPowerNoise;
+      break;
     case DIV_SYSTEM_DUMMY:
       dispatch=new DivPlatformDummy;
       break;

src/engine/instrument.cpp

@@ -1043,6 +1043,8 @@ void DivInstrument::putInsData2(SafeWriter* w, bool fui, const DivSong* song, bo
         featureFM=true;
         featureEF=true;
         break;
+      case DIV_INS_POWER_NOISE:
+        break;
       case DIV_INS_MAX:
         break;
       case DIV_INS_NULL:

src/engine/instrument.h

@@ -86,6 +86,7 @@ enum DivInstrumentType: unsigned short {
   DIV_INS_C140=53,
   DIV_INS_C219=54,
   DIV_INS_ESFM=55,
+  DIV_INS_POWER_NOISE=56,
   DIV_INS_MAX,
   DIV_INS_NULL
 };

src/engine/playback.cpp

@@ -247,6 +247,9 @@ const char* cmdName[]={
   "ESFM_MODIN",
   "ESFM_ENV_DELAY",
 
+  "POWER_NOISE_COUNTER_LOAD",
+  "POWER_NOISE_IO_WRITE",
+
   "MACRO_RESTART",
 };
 

src/engine/song.h

@@ -132,7 +132,8 @@ enum DivSystem {
   DIV_SYSTEM_TED,
   DIV_SYSTEM_C140,
   DIV_SYSTEM_C219,
-  DIV_SYSTEM_ESFM
+  DIV_SYSTEM_ESFM,
+  DIV_SYSTEM_POWER_NOISE,
 };
 
 enum DivEffectType: unsigned short {

src/engine/sysDef.cpp

@@ -1984,6 +1984,23 @@ void DivEngine::registerSystems() {
     },
     fmESFMPostEffectHandlerMap
   );
+  
+  sysDefs[DIV_SYSTEM_POWER_NOISE]=new DivSysDef(
+    "BS-C-04xx series (Power Noise)", NULL, 0xd2, 0, 4, false, false, 0, false, 0, 0, 0, 
+    "a fantasy sound chip designed by jvsTSX and The Beesh-Spweesh!\nused in the Hexheld fantasy console.",
+    {"Noise 1", "Noise 2", "Noise 3", "Slope"},
+    {"N1", "N2", "N3", "SL"},
+    {DIV_CH_NOISE, DIV_CH_NOISE, DIV_CH_NOISE, DIV_CH_PULSE},
+    {DIV_INS_POWER_NOISE, DIV_INS_POWER_NOISE, DIV_INS_POWER_NOISE, DIV_INS_POWER_NOISE},
+    {},
+    {
+      {0x20, {DIV_CMD_POWER_NOISE_COUNTER_LOAD, "20xx: Load low byte of noise channel LFSR (00 to FF) or slope channel accumulator (00 to 7F)", constVal<0>, effectVal}},
+      {0x21, {DIV_CMD_POWER_NOISE_COUNTER_LOAD, "21xx: Load high byte of noise channel LFSR (00 to FF)", constVal<1>, effectVal}},
+      {0x22, {DIV_CMD_POWER_NOISE_IO_WRITE, "22xx: Write to I/O port A", constVal<0>, effectVal}},
+      {0x23, {DIV_CMD_POWER_NOISE_IO_WRITE, "23xx: Write to I/O port B", constVal<1>, effectVal}},
+    },
+    {}
+  );
 
   sysDefs[DIV_SYSTEM_DUMMY]=new DivSysDef(
     "Dummy System", NULL, 0xfd, 0, 8, false, true, 0, false, 0, 0, 0,