diff --git a/SheepShaver/src/Unix/main_unix.cpp b/SheepShaver/src/Unix/main_unix.cpp
index 7ff5e2bf..38f6af29 100644
--- a/SheepShaver/src/Unix/main_unix.cpp
+++ b/SheepShaver/src/Unix/main_unix.cpp
@@ -987,10 +987,12 @@ void Dump68kRegs(M68kRegisters *r)
 
 void MakeExecutable(int dummy, void *start, uint32 length)
 {
-#if !EMULATED_PPC
-	if (((uint32)start >= ROM_BASE) && ((uint32)start < (ROM_BASE + ROM_SIZE)))
+	if (((uintptr)start >= ROM_BASE) && ((uintptr)start < (ROM_BASE + ROM_SIZE)))
 		return;
-	flush_icache_range(start, (void *)((uint32)start + length));
+#if EMULATED_PPC
+	FlushCodeCache((uintptr)start, (uintptr)start + length);
+#else
+	flush_icache_range(start, (void *)((uintptr)start + length));
 #endif
 }
 
diff --git a/SheepShaver/src/Unix/sysdeps.h b/SheepShaver/src/Unix/sysdeps.h
index 927bfe12..40577f71 100644
--- a/SheepShaver/src/Unix/sysdeps.h
+++ b/SheepShaver/src/Unix/sysdeps.h
@@ -79,6 +79,7 @@
 #endif
 // Configure PowerPC emulator
 #define PPC_NO_LAZY_PC_UPDATE 1
+#define PPC_NO_DECODE_CACHE 1
 #define PPC_FLIGHT_RECORDER 1
 #else
 // Mac ROM is write protected
diff --git a/SheepShaver/src/emul_op.cpp b/SheepShaver/src/emul_op.cpp
index a6c815ec..38a5e09a 100644
--- a/SheepShaver/src/emul_op.cpp
+++ b/SheepShaver/src/emul_op.cpp
@@ -257,10 +257,12 @@ void EmulOp(M68kRegisters *r, uint32 pc, int selector)
 			// Install drivers
 			InstallDrivers();
 
-#if !EMULATED_PPC
 			// Patch MakeExecutable()
 			MakeExecutableTvec = (uint32 *)FindLibSymbol("\023PrivateInterfaceLib", "\016MakeExecutable");
 			D(bug("MakeExecutable TVECT at %p\n", MakeExecutableTvec));
+#if EMULATED_PPC
+			MakeExecutableTvec[0] = POWERPC_NATIVE_OP_FUNC(NATIVE_MAKE_EXECUTABLE);
+#else
 #ifdef __BEOS__
 			MakeExecutableTvec[0] = ((uint32 *)MakeExecutable)[0];
 #else
diff --git a/SheepShaver/src/include/cpu_emulation.h b/SheepShaver/src/include/cpu_emulation.h
index ce9a4939..bfa54cd8 100644
--- a/SheepShaver/src/include/cpu_emulation.h
+++ b/SheepShaver/src/include/cpu_emulation.h
@@ -91,6 +91,7 @@ struct M68kRegisters;
 extern void Execute68k(uint32, M68kRegisters *r);			// Execute 68k subroutine from EMUL_OP routine, must be ended with RTS
 extern void Execute68kTrap(uint16 trap, M68kRegisters *r);	// Execute 68k A-Trap from EMUL_OP routine
 #if EMULATED_PPC
+extern void FlushCodeCache(uintptr start, uintptr end);		// Invalidate emulator caches
 extern void ExecuteNative(int selector);					// Execute native code from EMUL_OP routine (real mode switch)
 #else
 extern void ExecutePPC(void (*func)(void));					// Execute PPC code from EMUL_OP routine (real mode switch)
diff --git a/SheepShaver/src/include/emul_op.h b/SheepShaver/src/include/emul_op.h
index 5f08b5c2..4348c440 100644
--- a/SheepShaver/src/include/emul_op.h
+++ b/SheepShaver/src/include/emul_op.h
@@ -54,6 +54,7 @@ enum { // Selectors for NATIVE_EXEC callbacks (only used with PPC emulation)
   NATIVE_R_GET_RESOURCE,
   NATIVE_DISABLE_INTERRUPT,
   NATIVE_ENABLE_INTERRUPT,
+  NATIVE_MAKE_EXECUTABLE,
   NATIVE_OP_MAX
 };
 #define POWERPC_NATIVE_OP(SELECTOR) NativeOpTable[SELECTOR]
diff --git a/SheepShaver/src/kpx_cpu/sheepshaver_glue.cpp b/SheepShaver/src/kpx_cpu/sheepshaver_glue.cpp
index b1bbbd6a..dd9c76fd 100644
--- a/SheepShaver/src/kpx_cpu/sheepshaver_glue.cpp
+++ b/SheepShaver/src/kpx_cpu/sheepshaver_glue.cpp
@@ -144,7 +144,7 @@ void sheepshaver_cpu::init_decoder()
 		{ "sheep",
 		  (execute_fn)&sheepshaver_cpu::execute_sheep,
 		  NULL,
-		  D_form, 6, 0, CFLOW_TRAP
+		  D_form, 6, 0, CFLOW_JUMP | CFLOW_TRAP
 		}
 	};
 
@@ -492,6 +492,15 @@ static sheepshaver_cpu *main_cpu = NULL;		// CPU emulator to handle usual contro
 static sheepshaver_cpu *interrupt_cpu = NULL;	// CPU emulator to handle interrupts
 static sheepshaver_cpu *current_cpu = NULL;		// Current CPU emulator context
 
+void FlushCodeCache(uintptr start, uintptr end)
+{
+	D(bug("FlushCodeCache(%08x, %08x)\n", start, end));
+	main_cpu->invalidate_cache_range(start, end);
+#if MULTICORE_CPU
+	interrupt_cpu->invalidate_cache_range(start, end);
+#endif
+}
+
 static inline void cpu_push(sheepshaver_cpu *new_cpu)
 {
 #if MULTICORE_CPU
@@ -723,6 +732,7 @@ const uint32 NativeOpTable[NATIVE_OP_MAX] = {
 	POWERPC_NATIVE_OP_INIT(1, NATIVE_R_GET_RESOURCE),
 	POWERPC_NATIVE_OP_INIT(0, NATIVE_DISABLE_INTERRUPT),
 	POWERPC_NATIVE_OP_INIT(0, NATIVE_ENABLE_INTERRUPT),
+	POWERPC_NATIVE_OP_INIT(1, NATIVE_MAKE_EXECUTABLE),
 };
 
 static void get_resource(void);
@@ -790,6 +800,9 @@ static void NativeOp(int selector)
 	case NATIVE_ENABLE_INTERRUPT:
 		EnableInterrupt();
 		break;
+	case NATIVE_MAKE_EXECUTABLE:
+		MakeExecutable(0, (void *)GPR(4), GPR(5));
+		break;
 	default:
 		printf("FATAL: NATIVE_OP called with bogus selector %d\n", selector);
 		QuitEmulator();
diff --git a/SheepShaver/src/kpx_cpu/src/cpu/ppc/ppc-cpu.hpp b/SheepShaver/src/kpx_cpu/src/cpu/ppc/ppc-cpu.hpp
index c387f81f..7d6cec52 100644
--- a/SheepShaver/src/kpx_cpu/src/cpu/ppc/ppc-cpu.hpp
+++ b/SheepShaver/src/kpx_cpu/src/cpu/ppc/ppc-cpu.hpp
@@ -364,16 +364,15 @@ inline void powerpc_cpu::do_execute()
 		uint32 dpc = pc() - 4;
 		do {
 			uint32 opcode = vm_read_memory_4(dpc += 4);
-			ii = decode(opcode);
-			di->opcode = opcode;
-			di->execute = ii->execute;
 #if PPC_FLIGHT_RECORDER
 			if (is_logging()) {
-				di++;
 				di->opcode = opcode;
 				di->execute = &powerpc_cpu::record_step;
+				di++;
 			}
 #endif
+			di->opcode = opcode;
+			di->execute = ii->execute;
 			if (++di >= decode_cache_end_p) {
 				// Invalidate cache and move current code to start
 				invalidate_cache();