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Diffstat (limited to 'src/mame/drivers/xyonix.c')
-rw-r--r--src/mame/drivers/xyonix.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/src/mame/drivers/xyonix.c b/src/mame/drivers/xyonix.c
index 8f3e3f1f675..1ba064c0542 100644
--- a/src/mame/drivers/xyonix.c
+++ b/src/mame/drivers/xyonix.c
@@ -148,8 +148,8 @@ ADDRESS_MAP_END
static ADDRESS_MAP_START( port_map, ADDRESS_SPACE_IO, 8 )
ADDRESS_MAP_GLOBAL_MASK(0xff)
- AM_RANGE(0x20, 0x20) AM_READWRITE(SMH_NOP, sn76496_0_w) /* SN76496 ready signal */
- AM_RANGE(0x21, 0x21) AM_READWRITE(SMH_NOP, sn76496_1_w)
+ AM_RANGE(0x20, 0x20) AM_READNOP AM_DEVWRITE(SOUND, "sn1", sn76496_w) /* SN76496 ready signal */
+ AM_RANGE(0x21, 0x21) AM_READNOP AM_DEVWRITE(SOUND, "sn2", sn76496_w)
AM_RANGE(0x40, 0x40) AM_WRITE(SMH_NOP) /* NMI ack? */
AM_RANGE(0x50, 0x50) AM_WRITE(xyonix_irqack_w)
AM_RANGE(0x60, 0x61) AM_WRITE(SMH_NOP) /* mc6845 */