diff --git a/sys/arch/shark/isa/isa_io.c b/sys/arch/shark/isa/isa_io.c
index a655ebad13e7..c26fe4c18002 100644
--- a/sys/arch/shark/isa/isa_io.c
+++ b/sys/arch/shark/isa/isa_io.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: isa_io.c,v 1.4 2005/01/05 10:25:43 tsutsui Exp $	*/
+/*	$NetBSD: isa_io.c,v 1.5 2005/01/09 15:26:19 tsutsui Exp $	*/
 
 /*
  * Copyright 1997
@@ -38,7 +38,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: isa_io.c,v 1.4 2005/01/05 10:25:43 tsutsui Exp $");
+__KERNEL_RCSID(0, "$NetBSD: isa_io.c,v 1.5 2005/01/09 15:26:19 tsutsui Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -133,7 +133,7 @@ struct bus_space isa_io_bs_tag = {
 
 	/* copy */
 	bs_notimpl_bs_c_1,
-	bs_notimpl_bs_c_2,
+	isa_bs_c_2,
 	bs_notimpl_bs_c_4,
 	bs_notimpl_bs_c_8,
 };
@@ -214,7 +214,7 @@ struct bus_space isa_mem_bs_tag = {
 
 	/* copy */
 	bs_notimpl_bs_c_1,
-	bs_notimpl_bs_c_2,
+	isa_bs_c_2,
 	bs_notimpl_bs_c_4,
 	bs_notimpl_bs_c_8,
 };
diff --git a/sys/arch/shark/isa/isa_io_asm.S b/sys/arch/shark/isa/isa_io_asm.S
index 0462010411d5..6b7963fa6a84 100644
--- a/sys/arch/shark/isa/isa_io_asm.S
+++ b/sys/arch/shark/isa/isa_io_asm.S
@@ -1,4 +1,4 @@
-/*	$NetBSD: isa_io_asm.S,v 1.1 2002/02/10 01:57:53 thorpej Exp $	*/
+/*	$NetBSD: isa_io_asm.S,v 1.2 2005/01/09 15:26:19 tsutsui Exp $	*/
 
 /*-
  * Copyright (c) 1997 The NetBSD Foundation, Inc.
@@ -339,3 +339,37 @@ Lisa_bs_sr_2_loop:
 	bne	Lisa_bs_sr_2_loop
 
 	mov	pc, lr
+
+/*
+ * Copy region
+ */
+
+ENTRY(isa_bs_c_2)
+	add	r0, r1, r2
+	ldr	r2, [sp, #0]
+	add	r1, r2, r3
+	ldr	r2, [sp, #4]
+	teq	r2, #0
+	moveq	pc, lr
+
+	cmp	r0, r1
+	blt	2f
+
+1:	ldrh	r3, [r0], #2
+	strh	r3, [r1], #2
+	subs	r2, r2, #1
+	bne	1b
+
+	mov	pc, lr
+
+2:	add	r0, r0, r2, lsl #1
+	add	r1, r1, r2, lsl #1
+	sub	r0, r0, #2
+	sub	r1, r1, #2
+
+3:	ldrh	r3, [r0], #-2
+	strh	r3, [r1], #-2
+	subs	r2, r2, #1
+	bne	3b
+
+	mov	pc, lr