diff --git a/src/devices/bus/compis/hrg.cpp b/src/devices/bus/compis/hrg.cpp
index c4bcf950061..b68c191cdf4 100644
--- a/src/devices/bus/compis/hrg.cpp
+++ b/src/devices/bus/compis/hrg.cpp
@@ -42,7 +42,7 @@ ADDRESS_MAP_END
 
 
 //-------------------------------------------------
-//  UPD7220_INTERFACE( hgdc_intf )
+//  UPD7220_DISPLAY_PIXELS_MEMBER( display_pixels )
 //-------------------------------------------------
 
 UPD7220_DISPLAY_PIXELS_MEMBER( compis_hrg_t::display_pixels )
@@ -55,6 +55,20 @@ UPD7220_DISPLAY_PIXELS_MEMBER( compis_hrg_t::display_pixels )
 }
 
 
+//-------------------------------------------------
+//  UPD7220_DISPLAY_PIXELS_MEMBER( display_pixels )
+//-------------------------------------------------
+
+UPD7220_DISPLAY_PIXELS_MEMBER( compis_uhrg_t::display_pixels )
+{
+	UINT16 i,gfx = m_video_ram[(address & 0x1ffff) >> 1];
+	const pen_t *pen = m_palette->pens();
+
+	for(i=0; i<16; i++)
+		bitmap.pix32(y, x + i) = pen[BIT(gfx, i)];
+}
+
+
 //-------------------------------------------------
 //  MACHINE_CONFIG_FRAGMENT( hrg )
 //-------------------------------------------------
@@ -103,7 +117,7 @@ static MACHINE_CONFIG_FRAGMENT( uhrg )
 
 	MCFG_DEVICE_ADD(UPD7220_TAG, UPD7220, XTAL_4_433619MHz/2) // unknown clock
 	MCFG_DEVICE_ADDRESS_MAP(AS_0, uhrg_map)
-	MCFG_UPD7220_DISPLAY_PIXELS_CALLBACK_OWNER(compis_hrg_t, display_pixels)
+	MCFG_UPD7220_DISPLAY_PIXELS_CALLBACK_OWNER(compis_uhrg_t, display_pixels)
 	MCFG_VIDEO_SET_SCREEN(SCREEN_TAG)
 
 	MCFG_PALETTE_ADD_MONOCHROME("palette")
diff --git a/src/devices/bus/compis/hrg.h b/src/devices/bus/compis/hrg.h
index e62679f3d69..c5443d2df1e 100644
--- a/src/devices/bus/compis/hrg.h
+++ b/src/devices/bus/compis/hrg.h
@@ -45,7 +45,6 @@ protected:
 	virtual UINT8 pcs6_6_r(address_space &space, offs_t offset) override;
 	virtual void pcs6_6_w(address_space &space, offs_t offset, UINT8 data) override;
 
-private:
 	required_device<upd7220_device> m_crtc;
 	required_device<palette_device> m_palette;
 	required_shared_ptr<UINT16> m_video_ram;
@@ -64,6 +63,8 @@ public:
 
 	// optional information overrides
 	virtual machine_config_constructor device_mconfig_additions() const override;
+
+	UPD7220_DISPLAY_PIXELS_MEMBER( display_pixels );
 };
 
 
diff --git a/src/mame/drivers/compis.cpp b/src/mame/drivers/compis.cpp
index c919817719e..8c11ae56203 100644
--- a/src/mame/drivers/compis.cpp
+++ b/src/mame/drivers/compis.cpp
@@ -40,14 +40,6 @@
 
 ******************************************************************************/
 
-/*
-
-	TODO:
-
-	- cannot detect UHRG card (writes 0x1234 to 0x8000 in VRAM but does not read it back?)
-
-*/
-
 #include "emu.h"
 #include "softlist.h"
 #include "bus/centronics/ctronics.h"