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Diffstat (limited to 'src/devices/bus/a2bus/a2dx1.cpp')
-rw-r--r--src/devices/bus/a2bus/a2dx1.cpp119
1 files changed, 119 insertions, 0 deletions
diff --git a/src/devices/bus/a2bus/a2dx1.cpp b/src/devices/bus/a2bus/a2dx1.cpp
new file mode 100644
index 00000000000..e3b4fcc3fc5
--- /dev/null
+++ b/src/devices/bus/a2bus/a2dx1.cpp
@@ -0,0 +1,119 @@
+// license:BSD-3-Clause
+// copyright-holders:R. Belmont
+/*********************************************************************
+
+ a2dx1.c
+
+ Implementation of the Decillionix DX-1 sampler card
+
+*********************************************************************/
+
+#include "a2dx1.h"
+#include "includes/apple2.h"
+#include "sound/dac.h"
+
+/***************************************************************************
+ PARAMETERS
+***************************************************************************/
+
+//**************************************************************************
+// GLOBAL VARIABLES
+//**************************************************************************
+
+const device_type A2BUS_DX1 = &device_creator<a2bus_dx1_device>;
+
+#define DAC_TAG "dac"
+
+MACHINE_CONFIG_FRAGMENT( a2dx1 )
+ MCFG_SPEAKER_STANDARD_MONO("dx1spkr")
+ MCFG_SOUND_ADD(DAC_TAG, DAC, 0)
+ MCFG_SOUND_ROUTE(ALL_OUTPUTS, "dx1spkr", 1.00)
+MACHINE_CONFIG_END
+
+/***************************************************************************
+ FUNCTION PROTOTYPES
+***************************************************************************/
+
+//-------------------------------------------------
+// machine_config_additions - device-specific
+// machine configurations
+//-------------------------------------------------
+
+machine_config_constructor a2bus_dx1_device::device_mconfig_additions() const
+{
+ return MACHINE_CONFIG_NAME( a2dx1 );
+}
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+a2bus_dx1_device::a2bus_dx1_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, UINT32 clock, const char *shortname, const char *source) :
+ device_t(mconfig, type, name, tag, owner, clock, shortname, source),
+ device_a2bus_card_interface(mconfig, *this),
+ m_dac(*this, DAC_TAG)
+{
+}
+
+a2bus_dx1_device::a2bus_dx1_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
+ device_t(mconfig, A2BUS_DX1, "Decillonix DX-1", tag, owner, clock, "a2dx1", __FILE__),
+ device_a2bus_card_interface(mconfig, *this),
+ m_dac(*this, DAC_TAG)
+{
+}
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void a2bus_dx1_device::device_start()
+{
+ // set_a2bus_device makes m_slot valid
+ set_a2bus_device();
+
+ save_item(NAME(m_volume));
+ save_item(NAME(m_lastdac));
+}
+
+void a2bus_dx1_device::device_reset()
+{
+ m_volume = m_lastdac = 0;
+}
+
+UINT8 a2bus_dx1_device::read_c0nx(address_space &space, UINT8 offset)
+{
+ switch (offset)
+ {
+ case 1: // ADC input
+ return 0;
+
+ case 3: // busy flag
+ return 0x80; // indicate not busy
+
+ case 7: // 1-bit ADC input (bit 7 of c0n1, probably)
+ return 0;
+ }
+
+ return 0xff;
+}
+
+void a2bus_dx1_device::write_c0nx(address_space &space, UINT8 offset, UINT8 data)
+{
+ switch (offset)
+ {
+ case 5: // volume
+ m_volume = data;
+ m_dac->write_unsigned16(data*m_lastdac);
+ break;
+
+ case 6:
+ m_lastdac = data;
+ m_dac->write_unsigned16(data*m_volume);
+ break;
+ }
+}
+
+bool a2bus_dx1_device::take_c800()
+{
+ return false;
+}