diff --git a/sys/arch/prep/pnpbus/pnpbus.c b/sys/arch/prep/pnpbus/pnpbus.c
index 7a6352779434..1c1ed2c172b1 100644
--- a/sys/arch/prep/pnpbus/pnpbus.c
+++ b/sys/arch/prep/pnpbus/pnpbus.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: pnpbus.c,v 1.5 2006/06/23 03:08:41 garbled Exp $	*/
+/*	$NetBSD: pnpbus.c,v 1.6 2006/10/27 19:52:51 garbled Exp $	*/
 
 /*-
  * Copyright (c) 1998 The NetBSD Foundation, Inc.
@@ -37,7 +37,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: pnpbus.c,v 1.5 2006/06/23 03:08:41 garbled Exp $");
+__KERNEL_RCSID(0, "$NetBSD: pnpbus.c,v 1.6 2006/10/27 19:52:51 garbled Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -58,6 +58,8 @@ __KERNEL_RCSID(0, "$NetBSD: pnpbus.c,v 1.5 2006/06/23 03:08:41 garbled Exp $");
 
 #include <prep/pnpbus/pnpbusvar.h>
 
+#include "isadma.h"
+
 static int	pnpbus_match(struct device *, struct cfdata *, void *);
 static void	pnpbus_attach(struct device *, struct device *, void *);
 static int	pnpbus_print(void *, const char *);
@@ -88,6 +90,11 @@ pnpbus_attach(struct device *parent, struct device *self, void *aux)
 	sc->sc_ic = paa->paa_ic;
 	sc->sc_iot = paa->paa_iot;
 	sc->sc_memt = paa->paa_memt;
+	sc->sc_dmat = paa->paa_dmat;
+
+#if NISADMA > 0
+	isa_dmainit(sc->sc_ic, sc->sc_iot, sc->sc_dmat, self);
+#endif
 
 	(void)config_search_ia(pnpbus_search, self, "pnpbus", aux);
 }
@@ -347,6 +354,7 @@ pnp_getpna(struct pnpbus_dev_attach_args *pna, struct pnpbus_attach_args *paa,
 	pna->pna_iot = paa->paa_iot;
 	pna->pna_memt = paa->paa_memt;
 	pna->pna_ic = paa->paa_ic;
+	pna->pna_dmat = paa->paa_dmat;
 	pnp_devid_to_string(id->DevId, pna->pna_devid);
 	pna->basetype = id->BaseType;
 	pna->subtype = id->SubType;
diff --git a/sys/arch/prep/pnpbus/pnpbusvar.h b/sys/arch/prep/pnpbus/pnpbusvar.h
index d519fbf30000..90951f4b124b 100644
--- a/sys/arch/prep/pnpbus/pnpbusvar.h
+++ b/sys/arch/prep/pnpbus/pnpbusvar.h
@@ -1,4 +1,4 @@
-/*	$NetBSD: pnpbusvar.h,v 1.3 2006/06/23 03:08:41 garbled Exp $	*/
+/*	$NetBSD: pnpbusvar.h,v 1.4 2006/10/27 19:52:51 garbled Exp $	*/
 
 /*-
  * Copyright (c) 2006 The NetBSD Foundation, Inc.
@@ -90,6 +90,7 @@ struct pnpbus_attach_args {
 	bus_space_tag_t paa_iot;		/* i/o space tag */
 	bus_space_tag_t paa_memt;		/* mem space tag */
 	isa_chipset_tag_t paa_ic;		/* ISA chipset tag */
+	bus_dma_tag_t paa_dmat;			/* ISA DMA tag */
 };
 
 /*
@@ -99,6 +100,7 @@ struct pnpbus_dev_attach_args {
 	bus_space_tag_t pna_iot;	/* i/o space tag */
 	bus_space_tag_t pna_memt;	/* mem space tag */
 	isa_chipset_tag_t pna_ic;	/* ISA chipset tag */
+	bus_dma_tag_t pna_dmat;		/* ISA DMA tag */
 
 	struct pnpresources pna_res;	/* resources gathered from PNP */
 	char	pna_devid[8];		/* PNP device id string */
@@ -121,6 +123,7 @@ struct pnpbus_softc {
 
 	bus_space_tag_t sc_iot;		/* io space tag */
 	bus_space_tag_t sc_memt;	/* mem space tag */
+	bus_dma_tag_t sc_dmat;		/* ISA DMA tag */
 };
 
 int	pnpbus_scan(struct pnpbus_dev_attach_args *pna, PPC_DEVICE *dev);
diff --git a/sys/arch/prep/prep/mainbus.c b/sys/arch/prep/prep/mainbus.c
index 61b3f63cca32..534efbc43a7a 100644
--- a/sys/arch/prep/prep/mainbus.c
+++ b/sys/arch/prep/prep/mainbus.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: mainbus.c,v 1.25 2006/09/01 07:02:29 garbled Exp $	*/
+/*	$NetBSD: mainbus.c,v 1.26 2006/10/27 19:52:51 garbled Exp $	*/
 
 /*
  * Copyright (c) 1996 Christopher G. Demetriou.  All rights reserved.
@@ -31,7 +31,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: mainbus.c,v 1.25 2006/09/01 07:02:29 garbled Exp $");
+__KERNEL_RCSID(0, "$NetBSD: mainbus.c,v 1.26 2006/10/27 19:52:51 garbled Exp $");
 
 #include "opt_pci.h"
 #include "opt_residual.h"
@@ -163,6 +163,7 @@ mainbus_attach(struct device *parent, struct device *self, void *aux)
 	mba.mba_paa.paa_iot = &prep_isa_io_space_tag;
 	mba.mba_paa.paa_memt = &prep_isa_mem_space_tag;
 	mba.mba_paa.paa_ic = &prep_isa_chipset;
+	mba.mba_paa.paa_dmat = &isa_bus_dma_tag;
 	config_found_ia(self, "mainbus", &mba.mba_pba, mainbus_print);
 #endif /* NPNPBUS */