diff --git a/tm-11.cpp b/tm-11.cpp
index 057376d..2420148 100644
--- a/tm-11.cpp
+++ b/tm-11.cpp
@@ -10,11 +10,8 @@
 #include "memory.h"
 #include "utils.h"
 
-tm_11::tm_11(const std::string & file, memory *const m) : m(m)
+tm_11::tm_11(const std::string & file, memory *const m): file(file), m(m)
 {
-	fh = fopen(file.c_str(), "rb");
-
-	reset();
 }
 
 tm_11::~tm_11()
@@ -22,6 +19,13 @@ tm_11::~tm_11()
 	fclose(fh);
 }
 
+void tm_11::begin()
+{
+	fh = fopen(file.c_str(), "rb");
+
+	reset();
+}
+
 void tm_11::reset()
 {
 	memset(registers,   0x00, sizeof registers  );
diff --git a/tm-11.h b/tm-11.h
index 31801c8..45163c7 100644
--- a/tm-11.h
+++ b/tm-11.h
@@ -24,6 +24,7 @@ class memory;
 class tm_11 : public device
 {
 private:
+	std::string     file;
 	memory   *const m                  { nullptr };
 	uint16_t        registers[6]       { 0       };
 	uint8_t         xfer_buffer[65536];
@@ -34,6 +35,8 @@ public:
 	tm_11(const std::string & file, memory *const m);
 	virtual ~tm_11();
 
+	void begin();
+
 	void reset() override;
 
 	uint8_t  readByte(const uint16_t addr) override;