diff --git a/src/mame/audio/dcs.c b/src/mame/audio/dcs.c
index fa795f500b3..73e18454dc8 100644
--- a/src/mame/audio/dcs.c
+++ b/src/mame/audio/dcs.c
@@ -587,7 +587,7 @@ ADDRESS_MAP_END
 
 /* Basic DCS system with ADSP-2105 and 2k of SRAM (T-unit, V-unit, Killer Instinct) */
 MACHINE_DRIVER_START( dcs_audio_2k )
-	MDRV_CPU_ADD_TAG("dcs", ADSP2105, 10000000)
+	MDRV_CPU_ADD_TAG("dcs", ADSP2105, XTAL_10MHz)
 	MDRV_CPU_PROGRAM_MAP(dcs_2k_program_map,0)
 	MDRV_CPU_DATA_MAP(dcs_2k_data_map,0)
 
@@ -625,7 +625,7 @@ MACHINE_DRIVER_END
  *************************************/
 
 MACHINE_DRIVER_START( dcs2_audio_2115 )
-	MDRV_CPU_ADD_TAG("dcs2", ADSP2115, 16000000)
+	MDRV_CPU_ADD_TAG("dcs2", ADSP2115, XTAL_16MHz)
 	MDRV_CPU_PROGRAM_MAP(dcs2_2115_program_map,0)
 	MDRV_CPU_DATA_MAP(dcs2_2115_data_map,0)
 
@@ -641,7 +641,7 @@ MACHINE_DRIVER_END
 
 MACHINE_DRIVER_START( dcs2_audio_2104 )
 	MDRV_IMPORT_FROM(dcs2_audio_2115)
-	MDRV_CPU_REPLACE("dcs2", ADSP2104, 16000000)
+	MDRV_CPU_REPLACE("dcs2", ADSP2104, XTAL_16MHz)
 	MDRV_CPU_PROGRAM_MAP(dcs2_2104_program_map,0)
 	MDRV_CPU_DATA_MAP(dcs2_2104_data_map,0)
 MACHINE_DRIVER_END
@@ -655,7 +655,7 @@ MACHINE_DRIVER_END
  *************************************/
 
 MACHINE_DRIVER_START( dcs2_audio_dsio )
-	MDRV_CPU_ADD_TAG("dsio", ADSP2181, 32000000)
+	MDRV_CPU_ADD_TAG("dsio", ADSP2181, XTAL_32MHz)
 	MDRV_CPU_PROGRAM_MAP(dsio_program_map,0)
 	MDRV_CPU_DATA_MAP(dsio_data_map,0)
 	MDRV_CPU_IO_MAP(dsio_io_map,0)
@@ -678,7 +678,7 @@ MACHINE_DRIVER_END
  *************************************/
 
 MACHINE_DRIVER_START( dcs2_audio_denver )
-	MDRV_CPU_ADD_TAG("denver", ADSP2181, 33333333)
+	MDRV_CPU_ADD_TAG("denver", ADSP2181, XTAL_33_333MHz)
 	MDRV_CPU_PROGRAM_MAP(denver_program_map,0)
 	MDRV_CPU_DATA_MAP(denver_data_map,0)
 	MDRV_CPU_IO_MAP(denver_io_map,0)
diff --git a/src/mame/drivers/kinst.c b/src/mame/drivers/kinst.c
index 6edcf3c6a9f..ee99e30ea11 100644
--- a/src/mame/drivers/kinst.c
+++ b/src/mame/drivers/kinst.c
@@ -134,7 +134,7 @@ Notes:
 
 
 /* constants */
-#define MASTER_CLOCK	50000000
+#define MASTER_CLOCK	XTAL_50MHz
 
 
 /* local variables */
@@ -188,9 +188,6 @@ static MACHINE_START( kinst )
 
 static MACHINE_RESET( kinst )
 {
-	/* keep the DCS held in reset at startup */
-	dcs_reset_w(1);
-
 	/* reset the IDE controller */
 	ide_controller_reset(0);