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diff --git a/Pico/Pico.c b/Pico/Pico.c
index bc764b6..6d9d525 100644
--- a/Pico/Pico.c
+++ b/Pico/Pico.c
@@ -17,7 +17,9 @@ int PicoSkipFrame=0; // skip rendering frame?
 int PicoRegionOverride = 0; // override the region detection 0: Auto, 1: Japan NTSC, 2: Japan PAL, 4: US, 8: Europe
 int PicoAutoRgnOrder = 0;
 int emustatus = 0; // rapid_ym2612, multi_ym_updates
-void (*PicoWriteSound)(int len) = 0; // called once per frame at the best time to send sound buffer (PsndOut) to hardware
+void (*PicoWriteSound)(int len) = NULL; // called at the best time to send sound buffer (PsndOut) to hardware
+void (*PicoResetHook)(void) = NULL;
+void (*PicoLineHook)(void) = NULL;
 
 struct PicoSRAM SRam = {0,};
 int z80startCycle, z80stopCycle; // in 68k cycles
@@ -139,6 +141,8 @@ int PicoReset(int hard)
 
   PsndReset(); // pal must be known here
 
+  if (PicoResetHook) PicoResetHook();
+
   if (PicoMCD & 1) {
     PicoResetMCD(hard);
     return 0;
@@ -297,10 +301,10 @@ static void PicoRunZ80Simple(int line_from, int line_to)
       if ((line == 224 || line == line_sample) && PsndOut) getSamples(line);
       if (line == 32 && PsndOut) emustatus &= ~1;
       if (line >= line_from_r && line < line_to_r)
-        z80_run(228);
+        z80_run_nr(228);
     }
   } else if (line_to_r-line_from_r > 0) {
-    z80_run(228*(line_to_r-line_from_r));
+    z80_run_nr(228*(line_to_r-line_from_r));
     // samples will be taken by caller
   }
 }