diff --git a/arch/z80/src/Makefile.sdcc b/arch/z80/src/Makefile.sdcc
index d5ff3b79306..522c8d6f908 100644
--- a/arch/z80/src/Makefile.sdcc
+++ b/arch/z80/src/Makefile.sdcc
@@ -94,7 +94,7 @@ $(AOBJS) $(HEAD_OBJ): %$(OBJEXT): %$(ASMEXT)
 $(COBJS): %$(OBJEXT): %.c
 	$(call COMPILE, $<, $@)
 
-# This is a kludge to work around some conflicting symbols in libsdcc.liXqueb
+# This is a kludge to work around some conflicting symbols in libsdcc.lib
 
 $(SDCCLIBDIR)/myz80.lib: $(SDCCLIBDIR)/$(SDCCLIB)
 	@cat $(SDCCLIBDIR)/$(SDCCLIB) | \
diff --git a/arch/z80/src/z80/z80_io.c b/arch/z80/src/z80/z80_io.c
index cddaa6831f1..bdd55bc6b80 100644
--- a/arch/z80/src/z80/z80_io.c
+++ b/arch/z80/src/z80/z80_io.c
@@ -1,7 +1,7 @@
 /****************************************************************************
  * arch/z80/src/z80/z80_io.c
  *
- *   Copyright (C) 2008-2009 Gregory Nutt. All rights reserved.
+ *   Copyright (C) 2008-2009, 2012 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <gnutt@nuttx.org>
  *
  * Redistribution and use in source and binary forms, with or without
@@ -44,9 +44,23 @@
 #include "up_internal.h"
 
 /****************************************************************************
- * Private Definitions
+ * Pre-processor Definitions
  ****************************************************************************/
 
+#undef ASM
+#undef ENDASM
+#undef NAKED
+
+#ifdef CONFIG_SDCC_OLD
+#  define ASM    _asm
+#  define ENDASM _endasm
+#  define NAKED
+#else
+#  define ASM    __asm
+#  define ENDASM __endasm
+#  define NAKED  __naked
+#endif
+
 /****************************************************************************
  * Private Data
  ****************************************************************************/
@@ -69,11 +83,11 @@
 
 void outp(char p, char c)
 {
-  _asm
+  ASM
 	ld      c, 4(ix)	; port
 	ld      a, 5(ix)	; value
 	out     (c), a
-  _endasm;
+  ENDASM;
 }
 
 
@@ -85,10 +99,10 @@ void outp(char p, char c)
  *
  ****************************************************************************/
 
-char inp(char p)
+char inp(char p) NAKED
 {
-  _asm
+  ASM
 	ld      c, 4(ix)	;port
 	in      l, (c)
-  _endasm;
+  ENDASM;
 }
diff --git a/arch/z80/src/z80/z80_irq.c b/arch/z80/src/z80/z80_irq.c
index 08b426235d6..87ea7063ac5 100644
--- a/arch/z80/src/z80/z80_irq.c
+++ b/arch/z80/src/z80/z80_irq.c
@@ -1,7 +1,7 @@
 /****************************************************************************
  * arch/z80/src/z80/z80_irq.c
  *
- *   Copyright (C) 2007-2009, 2011 Gregory Nutt. All rights reserved.
+ *   Copyright (C) 2007-2009, 2011-2012 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <gnutt@nuttx.org>
  *
  * Redistribution and use in source and binary forms, with or without
@@ -48,6 +48,14 @@
  * Private Definitions
  ****************************************************************************/
 
+#ifdef CONFIG_SDCC_OLD
+#  define ASM    _asm
+#  define ENDASM _endasm
+#else
+#  define ASM    __asm
+#  define ENDASM __endasm
+#endif
+
 /****************************************************************************
  * Public Data
  ****************************************************************************/
@@ -80,13 +88,13 @@ volatile chipreg_t *current_regs;
 
 irqstate_t irqsave(void) __naked
 {
-  _asm
+  ASM
 	ld	a, i		; AF Parity bit holds interrupt state
 	di			; Interrupts are disabled
 	push	af		; Return AF in HL
 	pop	hl		;
 	ret			;
-  _endasm;
+  ENDASM;
 }
 
 /****************************************************************************
@@ -99,7 +107,7 @@ irqstate_t irqsave(void) __naked
 
 void irqrestore(irqstate_t flags) __naked
 {
-  _asm
+  ASM
 	di			; Assume disabled
 	pop	hl		; HL = return address
 	pop	af		; AF Parity bit holds interrupt state
@@ -109,5 +117,5 @@ statedisable:
 	push	af		; Restore stack
 	push	hl		;
 	ret			; and return
-  _endasm;
+  ENDASM;
 }