Add toolbar button and Action menu item to toggle forcing the recompiler to interpret blocks, should help with some slowdowns (tested to help with Daggerfall on both recompilers and Legend of Hero III on new recompiler).

src/cpu/386_dynarec.c

@@ -51,6 +51,7 @@
 
 #define CPU_BLOCK_END() cpu_block_end = 1
 
+int cpu_force_interpreter   = 0;
 int cpu_override_dynarec    = 0;
 int inrecomp                = 0;
 int cpu_block_end           = 0;
@@ -778,7 +779,7 @@ exec386_dynarec(int32_t cycs)
             cycles_old       = cycles;
             oldtsc           = tsc;
             tsc_old          = tsc;
-            if ((!CACHE_ON()) || cpu_override_dynarec) /*Interpret block*/
+            if (cpu_force_interpreter || cpu_override_dynarec ||  (!CACHE_ON())) /*Interpret block*/
             {
                 exec386_dynarec_int();
             } else {

src/cpu/cpu.h

@@ -823,6 +823,8 @@ extern MMX_REG  *MMP[8];
 extern uint16_t *MMEP[8];
 
 extern int  cpu_block_end;
+
+extern int  cpu_force_interpreter;
 extern int  cpu_override_dynarec;
 
 extern void mmx_init(void);

src/cpu/x86.c

@@ -373,6 +373,8 @@ reset_common(int hard)
     in_lock    = 0;
 
     cpu_cpurst_on_sr = 0;
+
+    cpu_force_interpreter = 0;
 }
 
 /* Hard reset. */