diff --git a/src/mame/includes/galaxold.h b/src/mame/includes/galaxold.h
index c6ed3ae8621..cb1a503a837 100644
--- a/src/mame/includes/galaxold.h
+++ b/src/mame/includes/galaxold.h
@@ -66,7 +66,6 @@ public:
 	UINT8 m__4in1_bank;
 	tilemap_t *m_bg_tilemap;
 	tilemap_t *m_rockclim_tilemap;
-	int m_mooncrst_gfxextend;
 	int m_spriteram2_present;
 	UINT8 m_gfxbank[5];
 	UINT8 m_flipscreen_x;
diff --git a/src/mame/includes/scramble.h b/src/mame/includes/scramble.h
index 20c26b47a8c..6c44551e48d 100644
--- a/src/mame/includes/scramble.h
+++ b/src/mame/includes/scramble.h
@@ -22,8 +22,6 @@ public:
 	optional_shared_ptr<UINT8> m_soundram;
 
 	UINT8 m_cavelon_bank;
-	UINT8 m_security_2B_counter;
-	UINT8 m_xb;
 
 	// harem
 	UINT8 m_harem_decrypt_mode;
@@ -83,8 +81,6 @@ public:
 	DECLARE_DRIVER_INIT(billiard);
 	DECLARE_MACHINE_RESET(scramble);
 	DECLARE_MACHINE_RESET(explorer);
-	DECLARE_WRITE8_MEMBER(scramble_protection_w);
-	DECLARE_READ8_MEMBER(scramble_protection_r);
 	DECLARE_WRITE_LINE_MEMBER(scramble_sh_7474_q_callback);
 	void cavelon_banksw();
 	inline int bit(int i,int n);
diff --git a/src/mame/machine/scramble.c b/src/mame/machine/scramble.c
index 1588999a577..cb1199489c5 100644
--- a/src/mame/machine/scramble.c
+++ b/src/mame/machine/scramble.c
@@ -19,8 +19,6 @@ MACHINE_RESET_MEMBER(scramble_state,scramble)
 
 	if (m_audiocpu != NULL)
 		sh_init();
-
-	m_security_2B_counter = 0;
 }
 
 MACHINE_RESET_MEMBER(scramble_state,explorer)
@@ -49,29 +47,6 @@ CUSTOM_INPUT_MEMBER(scramble_state::darkplnt_custom_r)
 
 /* state of the security PAL (6J) */
 
-WRITE8_MEMBER(scramble_state::scramble_protection_w)
-{
-	m_xb = data;
-}
-
-READ8_MEMBER(scramble_state::scramble_protection_r)
-{
-	switch (m_maincpu->pc())
-	{
-	case 0x00a8: return 0xf0;
-	case 0x00be: return 0xb0;
-	case 0x0c1d: return 0xf0;
-	case 0x0c6a: return 0xb0;
-	case 0x0ceb: return 0x40;
-	case 0x0d37: return 0x60;
-	case 0x1ca2: return 0x00;  /* I don't think it's checked */
-	case 0x1d7e: return 0xb0;
-	default:
-		logerror("%s: read protection\n",machine().describe_context());
-		return 0;
-	}
-}
-
 
 READ8_MEMBER(scramble_state::mariner_protection_1_r )
 {
diff --git a/src/mame/video/galaxold.c b/src/mame/video/galaxold.c
index 99c80a769b2..e9ae486b0dd 100644
--- a/src/mame/video/galaxold.c
+++ b/src/mame/video/galaxold.c
@@ -404,8 +404,6 @@ void galaxold_state::video_start_common()
 	m_modify_color = 0;
 	m_modify_ypos = 0;
 
-	m_mooncrst_gfxextend = 0;
-
 	m_draw_bullets = 0;
 
 	m_draw_background = &galaxold_state::galaxold_draw_background;