diff --git a/src/mame/drivers/karnov.cpp b/src/mame/drivers/karnov.cpp
index 6df531ebaee..36b56e79ee0 100644
--- a/src/mame/drivers/karnov.cpp
+++ b/src/mame/drivers/karnov.cpp
@@ -826,8 +826,7 @@ static MACHINE_CONFIG_START( karnov )
 	MCFG_SCREEN_PALETTE("palette")
 
 	MCFG_GFXDECODE_ADD("gfxdecode", "palette", karnov)
-	MCFG_PALETTE_ADD("palette", 1024)
-	MCFG_PALETTE_INIT_OWNER(karnov_state, karnov)
+	MCFG_DECO_RMC3_ADD_PROMS("palette","proms",1024) // xxxxBBBBGGGGRRRR with custom weighting
 
 	MCFG_DEVICE_ADD("spritegen", DECO_KARNOVSPRITES, 0)
 	MCFG_DECO_KARNOVSPRITES_GFX_REGION(2)
@@ -905,8 +904,7 @@ static MACHINE_CONFIG_START( wndrplnt )
 	MCFG_SCREEN_PALETTE("palette")
 
 	MCFG_GFXDECODE_ADD("gfxdecode", "palette", karnov)
-	MCFG_PALETTE_ADD("palette", 1024)
-	MCFG_PALETTE_INIT_OWNER(karnov_state, karnov)
+	MCFG_DECO_RMC3_ADD_PROMS("palette","proms",1024) // xxxxBBBBGGGGRRRR with custom weighting
 
 	MCFG_DEVICE_ADD("spritegen", DECO_KARNOVSPRITES, 0)
 	MCFG_DECO_KARNOVSPRITES_GFX_REGION(2)
diff --git a/src/mame/includes/karnov.h b/src/mame/includes/karnov.h
index 9c11f22b015..84b41b76824 100644
--- a/src/mame/includes/karnov.h
+++ b/src/mame/includes/karnov.h
@@ -9,6 +9,7 @@
 #include "machine/gen_latch.h"
 #include "video/bufsprite.h"
 #include "video/deckarn.h"
+#include "video/decrmc3.h"
 
 class karnov_state : public driver_device
 {
@@ -32,7 +33,7 @@ public:
 	required_device<buffered_spriteram16_device> m_spriteram;
 	required_device<deco_karnovsprites_device> m_spritegen;
 	required_device<gfxdecode_device> m_gfxdecode;
-	required_device<palette_device> m_palette;
+	required_device<deco_rmc3_device> m_palette;
 	required_device<generic_latch_8_device> m_soundlatch;
 
 	/* memory pointers */
@@ -69,7 +70,6 @@ public:
 	TILE_GET_INFO_MEMBER(get_fix_tile_info);
 	virtual void machine_start() override;
 	virtual void machine_reset() override;
-	DECLARE_PALETTE_INIT(karnov);
 	DECLARE_VIDEO_START(karnov);
 	DECLARE_VIDEO_START(wndrplnt);
 	uint32_t screen_update_karnov(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
diff --git a/src/mame/video/karnov.cpp b/src/mame/video/karnov.cpp
index 7fa4afa9769..a1584d7b2ed 100644
--- a/src/mame/video/karnov.cpp
+++ b/src/mame/video/karnov.cpp
@@ -9,64 +9,6 @@
 #include "emu.h"
 #include "includes/karnov.h"
 
-/***************************************************************************
-
-  Convert the color PROMs into a more useable format.
-
-  Karnov has two 1024x8 palette PROM.
-  I don't know the exact values of the resistors between the RAM and the
-  RGB output. I assumed these values (the same as Commando)
-
-  bit 7 -- 220 ohm resistor  -- GREEN
-        -- 470 ohm resistor  -- GREEN
-        -- 1  kohm resistor  -- GREEN
-        -- 2.2kohm resistor  -- GREEN
-        -- 220 ohm resistor  -- RED
-        -- 470 ohm resistor  -- RED
-        -- 1  kohm resistor  -- RED
-  bit 0 -- 2.2kohm resistor  -- RED
-
-  bit 7 -- unused
-        -- unused
-        -- unused
-        -- unused
-        -- 220 ohm resistor  -- BLUE
-        -- 470 ohm resistor  -- BLUE
-        -- 1  kohm resistor  -- BLUE
-  bit 0 -- 2.2kohm resistor  -- BLUE
-
-***************************************************************************/
-
-PALETTE_INIT_MEMBER(karnov_state, karnov)
-{
-	const uint8_t *color_prom = memregion("proms")->base();
-	int i;
-
-	for (i = 0; i < palette.entries(); i++)
-	{
-		int bit0, bit1, bit2, bit3, r, g, b;
-
-		bit0 = (color_prom[0] >> 0) & 0x01;
-		bit1 = (color_prom[0] >> 1) & 0x01;
-		bit2 = (color_prom[0] >> 2) & 0x01;
-		bit3 = (color_prom[0] >> 3) & 0x01;
-		r = 0x0e * bit0 + 0x1f * bit1 + 0x43 * bit2 + 0x8f * bit3;
-		bit0 = (color_prom[0] >> 4) & 0x01;
-		bit1 = (color_prom[0] >> 5) & 0x01;
-		bit2 = (color_prom[0] >> 6) & 0x01;
-		bit3 = (color_prom[0] >> 7) & 0x01;
-		g = 0x0e * bit0 + 0x1f * bit1 + 0x43 * bit2 + 0x8f * bit3;
-		bit0 = (color_prom[palette.entries()] >> 0) & 0x01;
-		bit1 = (color_prom[palette.entries()] >> 1) & 0x01;
-		bit2 = (color_prom[palette.entries()] >> 2) & 0x01;
-		bit3 = (color_prom[palette.entries()] >> 3) & 0x01;
-		b = 0x0e * bit0 + 0x1f * bit1 + 0x43 * bit2 + 0x8f * bit3;
-
-		palette.set_pen_color(i, rgb_t(r, g, b));
-		color_prom++;
-	}
-}
-
 void karnov_state::karnov_flipscreen_w( int data )
 {
 	m_flipscreen = data;