diff --git a/app/build.gradle b/app/build.gradle
index 60932dd..75ad731 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -21,13 +21,5 @@ model {
                 // compile and package all suppported ABI.
             }
         }
-
-        buildTypes {
-            release {
-                ndk {
-                    debuggable true
-                }
-            }
-        }
     }
 }
\ No newline at end of file
diff --git a/app/src/main/jni/emulate.c b/app/src/main/jni/emulate.c
index 6ce381f..68fbcc1 100644
--- a/app/src/main/jni/emulate.c
+++ b/app/src/main/jni/emulate.c
@@ -55,6 +55,7 @@
 
 #include "debugger.h"
 
+
 #if 0
 #define DEBUG_TIMER
 #define DEBUG_SCHED
@@ -66,6 +67,7 @@ static long	jumpaddr;
 unsigned long	instructions = 0;
 unsigned long	old_instr = 0;
 
+int throttle;
 int		rece_instr = 0;
 int		device_check = 0;
 
@@ -2453,35 +2455,25 @@ emulate()
 
   set_t1 = saturn.timer1;
 
-/*
-
-   do {
-    step_instruction();
-	
-    if (--schedule_event <= 0) {
-      schedule();
-    }
-  } while (exit_state);
-*/
-
   do {
 	  
     step_instruction();
 
-
-    /* gettimeofday(&tv, &tz);
-    while ((tv.tv_sec == tv2.tv_sec) && ((tv.tv_usec - tv2.tv_usec) < 2)) {
-	gettimeofday(&tv, &tz);
-    }
-    tv2.tv_usec = tv.tv_usec;
-    tv2.tv_sec = tv.tv_sec;
-
-    usleep(3);
-*/
-    if (schedule_event-- == 0)
       {
-        schedule();
+          int i;
+          for (i=0; i < sizeof(saturn.keybuf.rows)/sizeof(saturn.keybuf.rows[0]); i++) {
+              if (saturn.keybuf.rows[i] || throttle) {
+                  gettimeofday(&tv, &tz);
+                  while ((tv.tv_sec == tv2.tv_sec) && ((tv.tv_usec - tv2.tv_usec) < 2)) gettimeofday(&tv, &tz);
+                  tv2.tv_usec = tv.tv_usec; tv2.tv_sec = tv.tv_sec;
+                  break;
+              }
+          }
       }
+
+      if (schedule_event < 0) { /* puts("bug"); schedule_event = 0; */ }
+      if (schedule_event-- <= 0) { schedule(); }
+
   } while (!enter_debugger && exit_state); // exit_state
 
   return 0;
diff --git a/app/src/main/jni/hp48.h b/app/src/main/jni/hp48.h
index e867c5c..3a4480b 100644
--- a/app/src/main/jni/hp48.h
+++ b/app/src/main/jni/hp48.h
@@ -248,6 +248,7 @@ extern char    ram_filename  [256];
 extern char    conf_filename  [256];
 extern char    port1_filename [256];
 extern char    port2_filename [256];
+extern int  throttle;
 
 extern int		got_alarm;