diff --git a/src/mame/hitachi/mbs1.cpp b/src/mame/hitachi/mbs1.cpp
index 581b0466cf3..a2278d96037 100644
--- a/src/mame/hitachi/mbs1.cpp
+++ b/src/mame/hitachi/mbs1.cpp
@@ -4,7 +4,9 @@
 
 MB-S1 (c) 1984 Hitachi
 
-
+TODO:
+- Cassette won't load, not even in Level 3 mode;
+- Many features missing;
 
 **************************************************************************************************/
 
diff --git a/src/mame/hitachi/mbs1_mmu.cpp b/src/mame/hitachi/mbs1_mmu.cpp
index ae5f09b1026..9bd46756c0c 100644
--- a/src/mame/hitachi/mbs1_mmu.cpp
+++ b/src/mame/hitachi/mbs1_mmu.cpp
@@ -45,8 +45,6 @@ void mbs1_mmu_device::device_start()
 
 void mbs1_mmu_device::device_reset()
 {
-	// Mark 5 mode
-
 }
 
 // TODO: should not reset everything when in user mode
@@ -62,6 +60,7 @@ void mbs1_mmu_device::init_banks(bool system_type, bool user_mode)
 	}
 	else
 	{
+		// Level 3 mode
 		for (i = 0; i < 16; i++)
 			m_bank_latch[i] = 0xf0 | i;
 	}
diff --git a/src/mame/hitachi/mbs1_mmu.h b/src/mame/hitachi/mbs1_mmu.h
index e4c6dee0a9f..99e885f54ca 100644
--- a/src/mame/hitachi/mbs1_mmu.h
+++ b/src/mame/hitachi/mbs1_mmu.h
@@ -29,7 +29,7 @@ protected:
 	virtual void device_reset() override;
 private:
 	const address_space_config m_space_config;
-	address_space *     m_space;
+	address_space *m_space;
 
 	u8 m_bank_latch[16]{};
 };