diff --git a/source/m68k/m68kcpu.c b/source/m68k/m68kcpu.c
index bcafade..151ad57 100644
--- a/source/m68k/m68kcpu.c
+++ b/source/m68k/m68kcpu.c
@@ -836,13 +836,6 @@ extern uint32 count_m68k;
 
 void m68k_run (int cyc) 
 {
-  /* Make sure we're not stopped */
-  if(CPU_STOPPED)
-  {
-    count_m68k = cyc;
-    return;
-  }
-
   int temp;
 
   /* Return point if we had an address error */
@@ -870,6 +863,13 @@ void m68k_run (int cyc)
       CPU_INT_CYCLES = 0;
     }
 
+    /* Make sure we're not stopped */
+    if(CPU_STOPPED)
+    {
+      count_m68k = cyc;
+      return;
+    }
+
     /* execute a single instruction */
     count_m68k += m68k_execute();
   }
diff --git a/source/sound/ym2612.c b/source/sound/ym2612.c
index d3c05e2..cda6040 100644
--- a/source/sound/ym2612.c
+++ b/source/sound/ym2612.c
@@ -30,7 +30,7 @@
 **  - implemented correct SSG-EG emulation (Asterix, Beavis&Butthead, Bubba'n Six & many others)
 **  - adjusted some EG rates
 **  - modified address/data port behavior
-**  - fixed LFO implementation (only 11 bits of precision)
+**  - fixed Phase Modulation (LFO) calculations (precision reduced to 11 bits)
 **
 **  TODO: complete SSG-EG documentation
 **
@@ -1244,8 +1244,8 @@ INLINE void update_phase_lfo_slot(FM_SLOT *SLOT , INT32 pms, UINT32 block_fnum)
     /* retrieve BLOCK register value */
     UINT8 blk = (block_fnum >> 11) & 7;
 
-    /* increase FNUM register value */
-    UINT32 fn  = (block_fnum + lfo_fn_table_index_offset) & 0x7ff;
+    /* apply phase modulation to FNUM register value */
+    UINT32 fn  = (block_fnum + (UINT32)lfo_fn_table_index_offset) & 0x7ff;
 
     /* recalculate keyscale code */
     int kc = (blk<<2) | opn_fktable[fn >> 7];
@@ -1277,8 +1277,8 @@ INLINE void update_phase_lfo_channel(FM_CH *CH)
     /* retrieve BLOCK register value */
     UINT8 blk = (block_fnum >> 11) & 7;
 
-    /* increase FNUM register value */
-    UINT32 fn  = (block_fnum + lfo_fn_table_index_offset)& 0x7ff;
+    /* apply phase modulation to FNUM register value */
+    UINT32 fn  = (block_fnum + (UINT32)lfo_fn_table_index_offset) & 0x7ff;
 
     /* recalculate keyscale code */
     int kc = (blk<<2) | opn_fktable[fn >> 7];