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Diffstat (limited to 'src/mame/drivers/ppmast93.cpp')
-rw-r--r--src/mame/drivers/ppmast93.cpp4
1 files changed, 3 insertions, 1 deletions
diff --git a/src/mame/drivers/ppmast93.cpp b/src/mame/drivers/ppmast93.cpp
index b1a5de6c302..17b319e10ec 100644
--- a/src/mame/drivers/ppmast93.cpp
+++ b/src/mame/drivers/ppmast93.cpp
@@ -135,6 +135,7 @@ Dip locations added based on the notes above.
#include "cpu/z80/z80.h"
#include "machine/gen_latch.h"
#include "sound/dac.h"
+#include "sound/volt_reg.h"
#include "sound/ym2413.h"
#include "screen.h"
#include "speaker.h"
@@ -393,7 +394,8 @@ static MACHINE_CONFIG_START( ppmast93 )
MCFG_SOUND_ROUTE(ALL_OUTPUTS, "speaker", 1.0)
MCFG_SOUND_ADD("dac", DAC_8BIT_R2R, 0) MCFG_SOUND_ROUTE(ALL_OUTPUTS, "speaker", 0.3) // unknown DAC
- MCFG_SOUND_REFERENCE_INPUT(DAC_VREF_POS_INPUT, 1.0) MCFG_SOUND_REFERENCE_INPUT(DAC_VREF_NEG_INPUT, -1.0)
+ MCFG_DEVICE_ADD("vref", VOLTAGE_REGULATOR, 0) MCFG_VOLTAGE_REGULATOR_OUTPUT(5.0)
+ MCFG_SOUND_ROUTE_EX(0, "dac", 1.0, DAC_VREF_POS_INPUT) MCFG_SOUND_ROUTE_EX(0, "dac", -1.0, DAC_VREF_NEG_INPUT)
MACHINE_CONFIG_END
ROM_START( ppmast93 )