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-rw-r--r--src/devices/bus/pet/cb2snd.cpp64
1 files changed, 64 insertions, 0 deletions
diff --git a/src/devices/bus/pet/cb2snd.cpp b/src/devices/bus/pet/cb2snd.cpp
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index 00000000000..d89ef26268c
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+++ b/src/devices/bus/pet/cb2snd.cpp
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+// license:BSD-3-Clause
+// copyright-holders:R. Belmont
+/**********************************************************************
+
+ Commodore PET userport "CB2 sound" audio device emulation
+
+ http://zimmers.net/cbmpics/cbm/PETx/petfaq.html
+
+**********************************************************************/
+
+#include "cb2snd.h"
+
+//**************************************************************************
+// DEVICE DEFINITIONS
+//**************************************************************************
+
+const device_type PET_USERPORT_CB2_SOUND_DEVICE = &device_creator<pet_userport_cb2_sound_device>;
+
+#define DAC_TAG "dac"
+
+MACHINE_CONFIG_FRAGMENT( cb2snd )
+ MCFG_SPEAKER_STANDARD_MONO("cb2spkr")
+ MCFG_SOUND_ADD(DAC_TAG, DAC, 0)
+ MCFG_SOUND_ROUTE(ALL_OUTPUTS, "cb2spkr", 1.00)
+MACHINE_CONFIG_END
+
+//-------------------------------------------------
+// machine_config_additions - device-specific
+// machine configurations
+//-------------------------------------------------
+
+machine_config_constructor pet_userport_cb2_sound_device::device_mconfig_additions() const
+{
+ return MACHINE_CONFIG_NAME( cb2snd );
+}
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+// pet_userport_cb2_sound_device - constructor
+//-------------------------------------------------
+
+pet_userport_cb2_sound_device::pet_userport_cb2_sound_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
+ device_t(mconfig, PET_USERPORT_CB2_SOUND_DEVICE, "PET Userport 'CB2 Sound' Device", tag, owner, clock, "petucb2", __FILE__),
+ device_pet_user_port_interface(mconfig, *this),
+ m_dac(*this, DAC_TAG)
+{
+}
+
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void pet_userport_cb2_sound_device::device_start()
+{
+}
+
+DECLARE_WRITE_LINE_MEMBER( pet_userport_cb2_sound_device::input_m )
+{
+ m_dac->write_unsigned8(state ? 0xff : 0x00);
+}