diff --git a/src/mame/drivers/naomi.cpp b/src/mame/drivers/naomi.cpp
index 71b404b42b6..493626a3926 100644
--- a/src/mame/drivers/naomi.cpp
+++ b/src/mame/drivers/naomi.cpp
@@ -61,9 +61,9 @@ TODO (game-specific):
     - Giant Gram 2: no VMU emulation;
     - Gun Survivor 2: crashes during game loading;
     - Lupin the Shooting: "com. error between Naomi BD and i/o BD" after some secs. of gameplay;
-    - marstv: locks up during anchor talking (does same in Demul);
+    - marstv: temporary lock ups during anchor talking (does same in Demul);
     - marstv: missing graphics at stage select, renderer fault or something else?
-    - Monkey Ball: asserts when attempts to load a stage;
+    - monkeyba: CPU jumps to la la land when attempts to load a stage (bp c09e950, uses FPU opcodes for calculating the return address?);
     - Oinori-Daimyoujin Matsuri: reports "B. RAM error" in test mode, inputs doesn't seem to work after that point;
     - OutTrigger: crashes on naomibd_r();
     - puyofev: hangs after pressing start (bp 0C03F490, similar if not same snippet as Tetris 4d on DC).
diff --git a/src/mame/machine/namco_c148.cpp b/src/mame/machine/namco_c148.cpp
index e7e60b8aeb7..a12ece76d55 100644
--- a/src/mame/machine/namco_c148.cpp
+++ b/src/mame/machine/namco_c148.cpp
@@ -111,6 +111,14 @@ void namco_c148_device::device_start()
 	m_out_ext2_cb.resolve_safe();
 
 	// TODO: link to SCI, EX and the screen device controller devices
+
+	save_item(NAME(m_irqlevel.cpu));
+	save_item(NAME(m_irqlevel.ex));
+	save_item(NAME(m_irqlevel.sci));
+	save_item(NAME(m_irqlevel.pos));
+	save_item(NAME(m_irqlevel.vblank));
+	save_item(NAME(m_posirq_line));
+	save_item(NAME(m_bus_reg));
 }