diff --git a/riscemu/CPU.py b/riscemu/CPU.py
index 02b6e5b..fac3519 100644
--- a/riscemu/CPU.py
+++ b/riscemu/CPU.py
@@ -76,7 +76,7 @@ class CPU:
 
     def step(self):
         if self.exit:
-            print(FMT_CPU + "Program exited with code {}".format(self.exit_code) + FMT_NONE)
+            print(FMT_CPU + "[CPU] Program exited with code {}".format(self.exit_code) + FMT_NONE)
         else:
             try:
                 self.cycle += 1
diff --git a/riscemu/Executable.py b/riscemu/Executable.py
index 3602f17..4f7865f 100644
--- a/riscemu/Executable.py
+++ b/riscemu/Executable.py
@@ -204,7 +204,7 @@ class LoadedMemorySection:
                     ins = repr(self.content[i])
                 print(fmt_str.format(self.base + i, ins))
         else:
-            print(FMT_MEM +  "{}, viewing {} bytes:".format(
+            print(FMT_MEM + "{}, viewing {} bytes:".format(
                 self, end - start
             ) + FMT_NONE)
             for i in range(start, end, bytes_per_row):
diff --git a/riscemu/MMU.py b/riscemu/MMU.py
index e9be0d1..ec60e29 100644
--- a/riscemu/MMU.py
+++ b/riscemu/MMU.py
@@ -49,7 +49,7 @@ class MMU:
 
         self.global_symbols.update(loaded_bin.exported_symbols)
 
-        print(FMT_MEM + "Successfully loaded{}: {}".format(FMT_NONE, loaded_bin))
+        print(FMT_MEM + "[MMU] Successfully loaded{}: {}".format(FMT_NONE, loaded_bin))
 
         return loaded_bin
 
@@ -79,7 +79,7 @@ class MMU:
         sec.dump(addr, *args, **kwargs)
 
     def symbol(self, symb:str):
-        print(FMT_MEM + "Lookup for symbol {}:".format(symb) + FMT_NONE)
+        print(FMT_MEM + "[MMU] Lookup for symbol {}:".format(symb) + FMT_NONE)
         if symb in self.global_symbols:
             print("   Found global symbol {}: 0x{:X}".format(symb, self.global_symbols[symb]))
         for b in self.binaries:
diff --git a/riscemu/helpers.py b/riscemu/helpers.py
index 235d53c..ecd8019 100644
--- a/riscemu/helpers.py
+++ b/riscemu/helpers.py
@@ -3,6 +3,7 @@ from .Exceptions import NumberFormatException
 from .colors import *
 from .Exceptions import *
 
+
 def align_addr(addr: int, to_bytes: int = 8):
     """
     align an address to `to_bytes` (meaning addr & to_bytes = 0)
@@ -21,6 +22,7 @@ def parse_numeric_argument(arg: str):
     except ValueError as ex:
         raise ParseException('Invalid immediate argument \"{}\", maybe missing symbol?'.format(arg), (arg, ex))
 
+
 def int_to_bytes(val, bytes=4, unsigned=False):
     """
     int -> byte (two's complement)