diff --git a/docs/internal-structure.md b/docs/internal-structure.md
new file mode 100644
index 0000000..e69de29
diff --git a/riscemu/CPU.py b/riscemu/CPU.py
index 429341c..ec95ce6 100644
--- a/riscemu/CPU.py
+++ b/riscemu/CPU.py
@@ -100,5 +100,5 @@ class CPU:
         return "CPU(pc=0x{:08X}, cycle={}, instructions={})".format(
             self.pc,
             self.cycle,
-            " ".join(s.name for s in self.sets)
+            " ".join(s.name for s in self.instruction_sets)
         )
\ No newline at end of file
diff --git a/riscemu/instructions/InstructionSet.py b/riscemu/instructions/InstructionSet.py
index 93d6c8d..7f7b712 100644
--- a/riscemu/instructions/InstructionSet.py
+++ b/riscemu/instructions/InstructionSet.py
@@ -10,6 +10,7 @@ class InstructionSet(ABC):
     """
 
     def __init__(self, cpu: 'CPU'):
+        self.name = self.__class__.__name__
         self.cpu = cpu
         self.mmu = cpu.mmu
         self.regs = cpu.regs