diff --git a/.gitattributes b/.gitattributes
index 8361fa61cb2..c9973713140 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -3166,6 +3166,7 @@ src/mame/includes/snk.h svneol=native#text/plain
 src/mame/includes/snk6502.h svneol=native#text/plain
 src/mame/includes/snk68.h svneol=native#text/plain
 src/mame/includes/snookr10.h svneol=native#text/plain
+src/mame/includes/snowbros.h svneol=native#text/plain
 src/mame/includes/solomon.h svneol=native#text/plain
 src/mame/includes/sonson.h svneol=native#text/plain
 src/mame/includes/spacefb.h svneol=native#text/plain
diff --git a/src/mame/drivers/snowbros.c b/src/mame/drivers/snowbros.c
index 05986856d2a..513669a352c 100644
--- a/src/mame/drivers/snowbros.c
+++ b/src/mame/drivers/snowbros.c
@@ -64,6 +64,7 @@ out of the sprite list at that point.. (verify on real hw)
 
 #include "emu.h"
 #include "deprecat.h"
+#include "includes/snowbros.h"
 #include "cpu/m68000/m68000.h"
 #include "cpu/z80/z80.h"
 #include "sound/2151intf.h"
@@ -74,21 +75,6 @@ out of the sprite list at that point.. (verify on real hw)
 #include "cpu/mcs51/mcs51.h" // for semicom mcu
 
 
-class snowbros_state : public driver_device
-{
-public:
-	snowbros_state(running_machine &machine, const driver_device_config_base &config)
-		: driver_device(machine, config) { }
-
-	UINT16 *hyperpac_ram;
-	int sb3_music_is_playing;
-	int sb3_music;
-	UINT8 semicom_prot_offset;
-	UINT8 *spriteram;
-	size_t spriteram_size;
-};
-
-
 static WRITE16_HANDLER( snowbros_flipscreen_w )
 {
 	if (ACCESSING_BITS_8_15)
@@ -280,7 +266,7 @@ static ADDRESS_MAP_START( wintbob_map, AS_PROGRAM, 16 )
 	AM_RANGE(0x500002, 0x500003) AM_READ_PORT("DSW2")
 	AM_RANGE(0x500004, 0x500005) AM_READ_PORT("SYSTEM")
 	AM_RANGE(0x600000, 0x6001ff) AM_RAM_WRITE(paletteram16_xBBBBBGGGGGRRRRR_word_w) AM_BASE_GENERIC(paletteram)
-	AM_RANGE(0x700000, 0x701fff) AM_RAM AM_BASE_SIZE_MEMBER(snowbros_state, spriteram, spriteram_size)
+	AM_RANGE(0x700000, 0x701fff) AM_RAM AM_BASE_SIZE_MEMBER(snowbros_state, bootleg_spriteram16, spriteram_size)
 	AM_RANGE(0x800000, 0x800001) AM_WRITE(snowbros_irq4_ack_w)	/* IRQ 4 acknowledge */
 	AM_RANGE(0x900000, 0x900001) AM_WRITE(snowbros_irq3_ack_w)	/* IRQ 3 acknowledge */
 	AM_RANGE(0xa00000, 0xa00001) AM_WRITE(snowbros_irq2_ack_w)	/* IRQ 2 acknowledge */
@@ -301,7 +287,7 @@ static ADDRESS_MAP_START( honeydol_map, AS_PROGRAM, 16 )
 	AM_RANGE(0x900002, 0x900003) AM_READ_PORT("DSW2")
 	AM_RANGE(0x900004, 0x900005) AM_READ_PORT("SYSTEM")
 	AM_RANGE(0xa00000, 0xa007ff) AM_RAM_WRITE(paletteram16_xBBBBBGGGGGRRRRR_word_w) AM_BASE_GENERIC(paletteram)
-	AM_RANGE(0xb00000, 0xb01fff) AM_RAM AM_BASE_SIZE_MEMBER(snowbros_state, spriteram, spriteram_size)
+	AM_RANGE(0xb00000, 0xb01fff) AM_RAM AM_BASE_SIZE_MEMBER(snowbros_state, bootleg_spriteram16, spriteram_size)
 ADDRESS_MAP_END
 
 static ADDRESS_MAP_START( honeydol_sound_map, AS_PROGRAM, 8 )
@@ -338,7 +324,7 @@ static ADDRESS_MAP_START( twinadv_map, AS_PROGRAM, 16 )
 	AM_RANGE(0x500002, 0x500003) AM_READ_PORT("DSW2")
 	AM_RANGE(0x500004, 0x500005) AM_READ_PORT("SYSTEM")
 	AM_RANGE(0x600000, 0x6001ff) AM_RAM_WRITE(paletteram16_xBBBBBGGGGGRRRRR_word_w) AM_BASE_GENERIC(paletteram)
-	AM_RANGE(0x700000, 0x701fff) AM_RAM AM_BASE_SIZE_MEMBER(snowbros_state, spriteram, spriteram_size)
+	AM_RANGE(0x700000, 0x701fff) AM_RAM AM_BASE_SIZE_MEMBER(snowbros_state, bootleg_spriteram16, spriteram_size)
 	AM_RANGE(0x800000, 0x800001) AM_WRITE(snowbros_irq4_ack_w)	/* IRQ 4 acknowledge */
 	AM_RANGE(0x900000, 0x900001) AM_WRITE(snowbros_irq3_ack_w)	/* IRQ 3 acknowledge */
 	AM_RANGE(0xa00000, 0xa00001) AM_WRITE(snowbros_irq2_ack_w)	/* IRQ 2 acknowledge */
@@ -513,7 +499,7 @@ static ADDRESS_MAP_START( snowbros3_map, AS_PROGRAM, 16 )
 	AM_RANGE( 0x500002, 0x500003) AM_READ_PORT("DSW2")
 	AM_RANGE( 0x500004, 0x500005) AM_READ_PORT("SYSTEM")
 	AM_RANGE( 0x600000, 0x6003ff) AM_RAM_WRITE(paletteram16_xBBBBBGGGGGRRRRR_word_w) AM_BASE_GENERIC (paletteram)
-	AM_RANGE( 0x700000, 0x7021ff) AM_RAM AM_BASE_SIZE_MEMBER(snowbros_state, spriteram, spriteram_size)
+	AM_RANGE( 0x700000, 0x7021ff) AM_RAM AM_BASE_SIZE_MEMBER(snowbros_state, bootleg_spriteram16, spriteram_size)
 	AM_RANGE(0x800000, 0x800001) AM_WRITE(snowbros_irq4_ack_w)	/* IRQ 4 acknowledge */
 	AM_RANGE(0x900000, 0x900001) AM_WRITE(snowbros_irq3_ack_w)	/* IRQ 3 acknowledge */
 	AM_RANGE(0xa00000, 0xa00001) AM_WRITE(snowbros_irq2_ack_w)	/* IRQ 2 acknowledge */
diff --git a/src/mame/includes/snowbros.h b/src/mame/includes/snowbros.h
new file mode 100644
index 00000000000..f7852c83e2f
--- /dev/null
+++ b/src/mame/includes/snowbros.h
@@ -0,0 +1,17 @@
+#include "emu.h"
+
+class snowbros_state : public driver_device
+{
+public:
+	snowbros_state(running_machine &machine, const driver_device_config_base &config)
+		: driver_device(machine, config) { }
+
+	UINT16 *hyperpac_ram;
+	int sb3_music_is_playing;
+	int sb3_music;
+	UINT8 semicom_prot_offset;
+	UINT8 *spriteram;
+	UINT16 *bootleg_spriteram16;
+	size_t spriteram_size;
+};
+
diff --git a/src/mame/video/kan_panb.c b/src/mame/video/kan_panb.c
index 50190ceb786..b8b0464157e 100644
--- a/src/mame/video/kan_panb.c
+++ b/src/mame/video/kan_panb.c
@@ -2,10 +2,12 @@
 
 #include "emu.h"
 #include "kan_panb.h"
+#include "includes/snowbros.h"
 
 SCREEN_UPDATE( honeydol )
 {
-	UINT16 *spriteram16 = screen->machine().generic.spriteram.u16;
+	snowbros_state *state = screen->machine().driver_data<snowbros_state>();
+	UINT16 *spriteram16 = state->bootleg_spriteram16;
 	int sx=0, sy=0, x=0, y=0, offs;
 	/* sprites clip on left / right edges when scrolling, but it seems correct,
        no extra sprite attribute bits are set during this time, the sprite co-ordinates
@@ -90,7 +92,8 @@ SCREEN_UPDATE( honeydol )
 
 SCREEN_UPDATE( twinadv )
 {
-	UINT16 *spriteram16 = screen->machine().generic.spriteram.u16;
+	snowbros_state *state = screen->machine().driver_data<snowbros_state>();
+	UINT16 *spriteram16 = state->bootleg_spriteram16;
 	int sx=0, sy=0, x=0, y=0, offs;
 	/* sprites clip on left / right edges when scrolling, but it seems correct,
        no extra sprite attribute bits are set during this time, the sprite co-ordinates
@@ -145,12 +148,13 @@ SCREEN_UPDATE( twinadv )
 
 SCREEN_UPDATE( wintbob )
 {
-	UINT16 *spriteram16 = screen->machine().generic.spriteram.u16;
+	snowbros_state *state = screen->machine().driver_data<snowbros_state>();
+	UINT16 *spriteram16 = state->bootleg_spriteram16;
 	int offs;
 
 	bitmap_fill(bitmap,cliprect,get_black_pen(screen->machine()));
 
-	for (offs = 0;offs < screen->machine().generic.spriteram_size/2;offs += 8)
+	for (offs = 0;offs < state->spriteram_size/2;offs += 8)
 	{
 		int xpos  = spriteram16[offs] & 0xff;
 		int ypos  = spriteram16[offs+4] & 0xff;
@@ -188,7 +192,8 @@ SCREEN_UPDATE( wintbob )
 
 SCREEN_UPDATE( snowbro3 )
 {
-	UINT16 *spriteram16 = screen->machine().generic.spriteram.u16;
+	snowbros_state *state = screen->machine().driver_data<snowbros_state>();
+	UINT16 *spriteram16 = state->bootleg_spriteram16;
 	int sx=0, sy=0, x=0, y=0, offs;
 
 	/*
@@ -217,7 +222,7 @@ SCREEN_UPDATE( snowbro3 )
 
 	bitmap_fill(bitmap,cliprect,get_black_pen(screen->machine()));
 
-	for (offs = 0;offs < screen->machine().generic.spriteram_size/2;offs += 8)
+	for (offs = 0;offs < state->spriteram_size/2;offs += 8)
 	{
 		gfx_element *gfx = screen->machine().gfx[0];
 		int dx = spriteram16[offs+4] & 0xff;