diff --git a/sys/arch/mac68k/nubus/grf_nubus.c b/sys/arch/mac68k/nubus/grf_nubus.c
index 8f4ee294f517..d673e2c5592f 100644
--- a/sys/arch/mac68k/nubus/grf_nubus.c
+++ b/sys/arch/mac68k/nubus/grf_nubus.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: grf_nubus.c,v 1.60 2000/12/09 05:14:31 briggs Exp $	*/
+/*	$NetBSD: grf_nubus.c,v 1.61 2001/01/22 18:23:14 briggs Exp $	*/
 
 /*
  * Copyright (c) 1995 Allen Briggs.  All rights reserved.
@@ -65,6 +65,7 @@ static void	grfmv_intr_formac __P((void *vsc));
 static void	grfmv_intr_vimage __P((void *vsc));
 static void	grfmv_intr_gvimage __P((void *vsc));
 static void	grfmv_intr_radius_gsc __P((void *vsc));
+static void	grfmv_intr_radius_gx __P((void *vsc));
 
 static int	grfmv_mode __P((struct grf_softc *gp, int cmd, void *arg));
 static int	grfmv_match __P((struct device *, struct cfdata *, void *));
@@ -281,6 +282,9 @@ bad:
 	case NUBUS_DRHW_RADGSC:
 		add_nubus_intr(na->slot, grfmv_intr_radius_gsc, sc);
 		break;
+	case NUBUS_DRHW_RDCGX:
+		add_nubus_intr(na->slot, grfmv_intr_radius_gx, sc);
+		break;
 	case NUBUS_DRHW_FIILX:
 	case NUBUS_DRHW_FIISXDSP:
 	case NUBUS_DRHW_FUTURASX:
@@ -712,3 +716,16 @@ grfmv_intr_radius_gsc(vsc)
 	bus_space_write_1(sc->sc_tag, sc->sc_handle, 0xfb802, 0xff);
 }
 
+/*
+ * Routine to clear interrupts for the Radius GS/C
+ */
+/*ARGSUSED*/
+static void
+grfmv_intr_radius_gx(vsc)
+	void	*vsc;
+{
+	struct grfbus_softc *sc = (struct grfbus_softc *)vsc;
+
+	bus_space_write_1(sc->sc_tag, sc->sc_handle, 0x600000, 0x00);
+	bus_space_write_1(sc->sc_tag, sc->sc_handle, 0x600000, 0x20);
+}
diff --git a/sys/arch/mac68k/nubus/nubus.h b/sys/arch/mac68k/nubus/nubus.h
index fcedc1016a84..5309d76318d5 100644
--- a/sys/arch/mac68k/nubus/nubus.h
+++ b/sys/arch/mac68k/nubus/nubus.h
@@ -1,4 +1,4 @@
-/*	$NetBSD: nubus.h,v 1.53 2000/12/08 14:28:44 briggs Exp $	*/
+/*	$NetBSD: nubus.h,v 1.54 2001/01/22 18:23:14 briggs Exp $	*/
 
 /*
  * Copyright (c) 1995 Allen Briggs.  All rights reserved.
@@ -69,6 +69,7 @@
 #define    NUBUS_DRHW_VIMAGE	0x026E	/* Interware Co., Ltd. Vimage */
 #define    NUBUS_DRHW_CB364	0x026F	/* RasterOps ColorBoard 364 */
 #define    NUBUS_DRHW_LVIEW	0x0278	/* Sigma Designs L-View */
+#define    NUBUS_DRHW_RDCGX	0x027C	/* Radius DirectColor/GX */
 #define	   NUBUS_DRHW_RPC8	0x0291	/* Radius PrecisionColor 8 */
 #define	   NUBUS_DRHW_LAPIS	0x0292	/* SE/30 Lapis ProColorServer 8 PDS */
 #define	   NUBUS_DRHW_ROPS24LXI	0x02A0	/* RasterOps 8/24 XLi */