diff --git a/src/mame/drivers/crgolf.c b/src/mame/drivers/crgolf.c
index 44e850c31fd..54265d28cf3 100644
--- a/src/mame/drivers/crgolf.c
+++ b/src/mame/drivers/crgolf.c
@@ -237,11 +237,11 @@ static ADDRESS_MAP_START( main_map, ADDRESS_SPACE_PROGRAM, 8 )
 	AM_RANGE(0x0000, 0x3fff) AM_ROM
 	AM_RANGE(0x4000, 0x5fff) AM_RAM
 	AM_RANGE(0x6000, 0x7fff) AM_ROMBANK(1)
-	AM_RANGE(0x8003, 0x8003) AM_WRITE(SMH_RAM) AM_BASE(&crgolf_color_select)
-	AM_RANGE(0x8004, 0x8004) AM_WRITE(SMH_RAM) AM_BASE(&crgolf_screen_flip)
-	AM_RANGE(0x8005, 0x8005) AM_WRITE(SMH_RAM) AM_BASE(&crgolf_screen_select)
-	AM_RANGE(0x8006, 0x8006) AM_WRITE(SMH_RAM) AM_BASE(&crgolf_screenb_enable)
-	AM_RANGE(0x8007, 0x8007) AM_WRITE(SMH_RAM) AM_BASE(&crgolf_screena_enable)
+	AM_RANGE(0x8003, 0x8003) AM_WRITEONLY AM_BASE(&crgolf_color_select)
+	AM_RANGE(0x8004, 0x8004) AM_WRITEONLY AM_BASE(&crgolf_screen_flip)
+	AM_RANGE(0x8005, 0x8005) AM_WRITEONLY AM_BASE(&crgolf_screen_select)
+	AM_RANGE(0x8006, 0x8006) AM_WRITEONLY AM_BASE(&crgolf_screenb_enable)
+	AM_RANGE(0x8007, 0x8007) AM_WRITEONLY AM_BASE(&crgolf_screena_enable)
 	AM_RANGE(0x8800, 0x8800) AM_READWRITE(sound_to_main_r, main_to_sound_w)
 	AM_RANGE(0x9000, 0x9000) AM_WRITE(rom_bank_select_w)
 	AM_RANGE(0xa000, 0xffff) AM_READWRITE(crgolf_videoram_r, crgolf_videoram_w)