diff --git a/src/cpu.ml b/src/cpu.ml
index f67bf2a..27295e5 100644
--- a/src/cpu.ml
+++ b/src/cpu.ml
@@ -30,6 +30,21 @@ type t = {
   mutable cycles : int;
 }
 
+let print_cpu_state cpu =
+  printf "Registers:\n";
+  printf "  A: 0x%02X  F: 0x%02X\n" (int_of_char cpu.reg.a) (int_of_char cpu.reg.f);
+  printf "  B: 0x%02X  C: 0x%02X\n" (int_of_char cpu.reg.b) (int_of_char cpu.reg.c);
+  printf "  D: 0x%02X  E: 0x%02X\n" (int_of_char cpu.reg.d) (int_of_char cpu.reg.e);
+  printf "  H: 0x%02X  L: 0x%02X\n" (int_of_char cpu.reg.h) (int_of_char cpu.reg.l);
+  printf "  PC: 0x%04X\n" cpu.reg.pc;
+  printf "  SP: 0x%04X\n" cpu.reg.sp;
+
+  printf "Flags:\n";
+  printf "  Z: %b\n" cpu.flag.z;
+  printf "  N: %b\n" cpu.flag.n;
+  printf "  H: %b\n" cpu.flag.h;
+  printf "  C: %b\n" cpu.flag.c
+
 (** http://bgb.bircd.org/pandocs.htm#powerupsequence *)
 let init_registers =
   {
@@ -109,6 +124,8 @@ let read_pc_2bytes cpu mem =
   https://github.com/sinamas/gambatte/blob/master/libgambatte/src/cpu.cpp
 *)
 let run cpu (mem: Memory.map) =
+  printf "\n";
+  print_cpu_state cpu;
   let opcode = read_pc_byte cpu mem |> char_of_int in
 (*  Hexa.print_slice cartridge.full_rom cpu.reg.pc (cpu.reg.pc + 7); *)
   match opcode with