diff --git a/Source/HBIOS/ez80cpudrv.asm b/Source/HBIOS/ez80cpudrv.asm
index b972e272..22dc7bb3 100644
--- a/Source/HBIOS/ez80cpudrv.asm
+++ b/Source/HBIOS/ez80cpudrv.asm
@@ -77,14 +77,12 @@ EZ80_PREINIT:
 
 
 #IF (EZ80_WSMD_TYP == EZ80WSMD_CYCLES)
-	LD	L, EZ80_MEM_CYCLES
-	OR	$80
+	LD	L, EZ80_MEM_CYCLES | $80
 	EZ80_UTIL_MEMTM_SET()
 	LD	A, L
 	LD	(EZ80_PLT_MEMWS), A
 
-	LD	L, EZ80_IO_CYCLES
-	OR	$80
+	LD	L, EZ80_IO_CYCLES | $80
 	EZ80_UTIL_IOTM_SET()
 	LD	A, L
 	LD	(EZ80_PLT_IOWS), A