o add my bsnes branch

tools/bsnes/dsp/sdsp/misc.cpp

@@ -0,0 +1,35 @@
+#ifdef SDSP_CPP
+
+void sDSP::misc_27() {
+  state.t_pmon = REG(pmon) & ~1; //voice 0 doesn't support PMON
+}
+
+void sDSP::misc_28() {
+  state.t_non = REG(non);
+  state.t_eon = REG(eon);
+  state.t_dir = REG(dir);
+}
+
+void sDSP::misc_29() {
+  state.every_other_sample ^= 1;
+  if(state.every_other_sample) {
+    state.new_kon &= ~state.kon; //clears KON 63 clocks after it was last read
+  }
+}
+
+void sDSP::misc_30() {
+  if(state.every_other_sample) {
+    state.kon = state.new_kon;
+    state.t_koff = REG(koff);
+  }
+
+  counter_tick();
+
+  //noise
+  if(counter_poll(REG(flg) & 0x1f) == true) {
+    int feedback = (state.noise << 13) ^ (state.noise << 14);
+    state.noise = (feedback & 0x4000) ^ (state.noise >> 1);
+  }
+}
+
+#endif //ifdef SDSP_CPP