diff --git a/src/mame/drivers/dkong.cpp b/src/mame/drivers/dkong.cpp
index c869ca8be03..0fd9536d9c5 100644
--- a/src/mame/drivers/dkong.cpp
+++ b/src/mame/drivers/dkong.cpp
@@ -633,17 +633,6 @@ READ8_MEMBER(dkong_state::dkong_in2_r)
 	return r;
 }
 
-READ8_MEMBER(dkong_state::s2650_mirror_r)
-{
-	return space.read_byte(0x1000 + offset);
-}
-
-
-WRITE8_MEMBER(dkong_state::s2650_mirror_w)
-{
-	space.write_byte(0x1000 + offset, data);
-}
-
 
 READ8_MEMBER(dkong_state::epos_decrypt_rom)
 {
@@ -892,28 +881,25 @@ void dkong_state::epos_readport(address_map &map)
 void dkong_state::s2650_map(address_map &map)
 {
 	map(0x0000, 0x0fff).rom();
-	map(0x1000, 0x13ff).ram().share("sprite_ram");  /* 0x7000 */
-	map(0x1400, 0x1400).mirror(0x007f).portr("IN0").w("ls175.3d", FUNC(latch8_device::write));
-	map(0x1480, 0x1480).portr("IN1");
-	map(0x1500, 0x1500).mirror(0x007f).r(FUNC(dkong_state::dkong_in2_r));                                 /* IN2 */
-	map(0x1500, 0x1507).w(m_dev_6h, FUNC(latch8_device::bit0_w));       /* Sound signals */
-	map(0x1580, 0x1580).portr("DSW0").w(FUNC(dkong_state::dkong_audio_irq_w));     /* DSW0 */
-	map(0x1582, 0x1582).w(FUNC(dkong_state::dkong_flipscreen_w));
-	map(0x1583, 0x1583).w(FUNC(dkong_state::dkong_spritebank_w));                         /* 2 PSL Signal */
-	map(0x1584, 0x1584).noprw();                                               /* Possibly still interrupt enable */
-	map(0x1585, 0x1585).w(FUNC(dkong_state::p8257_drq_w));          /* P8257 ==> /DRQ0 /DRQ1 */
-	map(0x1586, 0x1587).w(FUNC(dkong_state::dkong_palettebank_w));
-	map(0x1600, 0x17ff).ram();                                               /* 0x6400  spriteram location */
-	map(0x1800, 0x1bff).ram().w(FUNC(dkong_state::dkong_videoram_w)).share("video_ram");        /* 0x7400 */
-	map(0x1C00, 0x1f7f).ram();                                               /* 0x6000 */
-	map(0x1f80, 0x1f8f).rw(m_dma8257, FUNC(i8257_device::read), FUNC(i8257_device::write));   /* P8257 control registers */
+	map(0x1000, 0x13ff).mirror(0x6000).ram().share("sprite_ram");  /* 0x7000 */
+	map(0x1400, 0x1400).mirror(0x607f).portr("IN0").w("ls175.3d", FUNC(latch8_device::write));
+	map(0x1480, 0x1480).mirror(0x6000).portr("IN1");
+	map(0x1500, 0x1500).mirror(0x607f).r(FUNC(dkong_state::dkong_in2_r));                                 /* IN2 */
+	map(0x1500, 0x1507).mirror(0x6000).w(m_dev_6h, FUNC(latch8_device::bit0_w));       /* Sound signals */
+	map(0x1580, 0x1580).mirror(0x6000).portr("DSW0").w(FUNC(dkong_state::dkong_audio_irq_w));     /* DSW0 */
+	map(0x1582, 0x1582).mirror(0x6000).w(FUNC(dkong_state::dkong_flipscreen_w));
+	map(0x1583, 0x1583).mirror(0x6000).w(FUNC(dkong_state::dkong_spritebank_w));                         /* 2 PSL Signal */
+	map(0x1584, 0x1584).mirror(0x6000).noprw();                                               /* Possibly still interrupt enable */
+	map(0x1585, 0x1585).mirror(0x6000).w(FUNC(dkong_state::p8257_drq_w));          /* P8257 ==> /DRQ0 /DRQ1 */
+	map(0x1586, 0x1587).mirror(0x6000).w(FUNC(dkong_state::dkong_palettebank_w));
+	map(0x1600, 0x17ff).mirror(0x6000).ram();                                               /* 0x6400  spriteram location */
+	map(0x1800, 0x1bff).mirror(0x6000).ram().w(FUNC(dkong_state::dkong_videoram_w)).share("video_ram");        /* 0x7400 */
+	map(0x1C00, 0x1f7f).mirror(0x6000).ram();                                               /* 0x6000 */
+	map(0x1f80, 0x1f8f).mirror(0x6000).rw(m_dma8257, FUNC(i8257_device::read), FUNC(i8257_device::write));   /* P8257 control registers */
 	/* 0x6800 not remapped */
 	map(0x2000, 0x2fff).rom();
-	map(0x3000, 0x3fff).rw(FUNC(dkong_state::s2650_mirror_r), FUNC(dkong_state::s2650_mirror_w));
 	map(0x4000, 0x4fff).rom();
-	map(0x5000, 0x5fff).rw(FUNC(dkong_state::s2650_mirror_r), FUNC(dkong_state::s2650_mirror_w));
 	map(0x6000, 0x6fff).rom();
-	map(0x7000, 0x7fff).rw(FUNC(dkong_state::s2650_mirror_r), FUNC(dkong_state::s2650_mirror_w));
 }
 
 void dkong_state::s2650_io_map(address_map &map)
diff --git a/src/mame/includes/dkong.h b/src/mame/includes/dkong.h
index 9b94953c177..456fdd43d69 100644
--- a/src/mame/includes/dkong.h
+++ b/src/mame/includes/dkong.h
@@ -265,8 +265,6 @@ private:
 	void hb_dma_write_byte(offs_t offset, uint8_t data);
 	DECLARE_WRITE8_MEMBER(dkong3_coin_counter_w);
 	DECLARE_READ8_MEMBER(dkong_in2_r);
-	DECLARE_READ8_MEMBER(s2650_mirror_r);
-	DECLARE_WRITE8_MEMBER(s2650_mirror_w);
 	DECLARE_READ8_MEMBER(epos_decrypt_rom);
 	DECLARE_WRITE8_MEMBER(s2650_data_w);
 	DECLARE_WRITE_LINE_MEMBER(s2650_fo_w);