diff --git a/src/engine/platform/c140.cpp b/src/engine/platform/c140.cpp
index 58ef1570b..f68531576 100644
--- a/src/engine/platform/c140.cpp
+++ b/src/engine/platform/c140.cpp
@@ -639,10 +639,26 @@ void DivPlatformC140::set219(bool is_219) {
   totalChans=is219?16:24;
 }
 
+int DivPlatformC140::getClockRangeMin() {
+  if (is219) return 1000000;
+  return MIN_CUSTOM_CLOCK;
+}
+
+int DivPlatformC140::getClockRangeMax() {
+  if (is219) return 100000000;
+  return MAX_CUSTOM_CLOCK;
+}
+
 void DivPlatformC140::setFlags(const DivConfig& flags) {
-  chipClock=32000*256; // 8.192MHz and 12.288MHz input, verified from Assault Schematics
-  CHECK_CUSTOM_CLOCK;
-  rate=chipClock/192;
+  if (is219) {
+    chipClock=50113000; // 50.113MHz clock input in Namco NA-1/NA-2 PCB
+    CHECK_CUSTOM_CLOCK;
+    rate=chipClock/1136; // assumed as ~44100hz
+  } else {
+    chipClock=32000*256; // 8.192MHz and 12.288MHz input, verified from Assault Schematics
+    CHECK_CUSTOM_CLOCK;
+    rate=chipClock/192;
+  }
   for (int i=0; i<totalChans; i++) {
     oscBuf[i]->rate=rate;
   }
diff --git a/src/engine/platform/c140.h b/src/engine/platform/c140.h
index 0706a6fbc..fb74151c0 100644
--- a/src/engine/platform/c140.h
+++ b/src/engine/platform/c140.h
@@ -106,6 +106,8 @@ class DivPlatformC140: public DivDispatch {
     size_t getSampleMemUsage(int index = 0);
     bool isSampleLoaded(int index, int sample);
     void renderSamples(int chipID);
+    int getClockRangeMin();
+    int getClockRangeMax();
     void set219(bool is_219);
     void setFlags(const DivConfig& flags);
     int init(DivEngine* parent, int channels, int sugRate, const DivConfig& flags);
diff --git a/src/gui/sysConf.cpp b/src/gui/sysConf.cpp
index 1609ca7b0..b048ca6a0 100644
--- a/src/gui/sysConf.cpp
+++ b/src/gui/sysConf.cpp
@@ -2099,6 +2099,7 @@ bool FurnaceGUI::drawSysConf(int chan, DivSystem type, DivConfig& flags, bool mo
     case DIV_SYSTEM_PV1000:
     case DIV_SYSTEM_VERA:
     case DIV_SYSTEM_C140:
+    case DIV_SYSTEM_C219:
       break;
     case DIV_SYSTEM_YMU759:
       supportsCustomRate=false;