diff --git a/sys/arch/pmax/dev/dc_ds.c b/sys/arch/pmax/dev/dc_ds.c
index 15243bc41626..4b77c9620958 100644
--- a/sys/arch/pmax/dev/dc_ds.c
+++ b/sys/arch/pmax/dev/dc_ds.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: dc_ds.c,v 1.11 1999/12/08 00:13:33 simonb Exp $	*/
+/*	$NetBSD: dc_ds.c,v 1.12 1999/12/08 04:03:28 simonb Exp $	*/
 
 /*
  * Copyright 1996 The Board of Trustees of The Leland Stanford
@@ -29,6 +29,9 @@
 #include <pmax/dev/dc_cons.h>
 #include <pmax/dev/dc_ds_cons.h>
 #include <pmax/pmax/kn01.h>
+#include <pmax/pmax/kn02.h>
+#include <pmax/pmax/kn230.h>
+#include <pmax/pmax/pmaxtype.h>
 
 /*
  * Autoconfig definition of driver front-end
@@ -48,14 +51,26 @@ int
 dc_ds_consinit(dev)
 	dev_t dev;
 {
-#if defined(DEBUG) && 1			/* XXX untested */
-	printf("dc_ds(%d,%d): serial console at 0x%x\n",
-	       minor(dev) >> 2, minor(dev) & 03,
-	       MIPS_PHYS_TO_KSEG1(KN01_SYS_DZ));
-#endif
-	/* let any  pending PROM output from boot drain */
+	u_int32_t dcaddr;
+
+	switch (systype) {
+	  case DS_PMAX:
+		dcaddr = KN01_SYS_DZ;
+		break;
+	  case DS_3MAX:
+		dcaddr = KN02_SYS_DZ;
+		break;
+	  case DS_MIPSMATE:
+		dcaddr = KN230_SYS_DZ0;
+		break;
+	  default:
+		/* XXX error?? */
+		break;
+	}
+
+	/* let any pending PROM output from boot drain */
 	DELAY(100000);
-	dc_consinit(dev, (void *)MIPS_PHYS_TO_KSEG1(KN01_SYS_DZ));
+	dc_consinit(dev, (void *)MIPS_PHYS_TO_KSEG1(dcaddr));
 	return (1);
 }