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Diffstat (limited to 'src/devices/bus/a2bus/a2alfam2.cpp')
-rw-r--r--src/devices/bus/a2bus/a2alfam2.cpp129
1 files changed, 81 insertions, 48 deletions
diff --git a/src/devices/bus/a2bus/a2alfam2.cpp b/src/devices/bus/a2bus/a2alfam2.cpp
index e97722708da..72815dcce53 100644
--- a/src/devices/bus/a2bus/a2alfam2.cpp
+++ b/src/devices/bus/a2bus/a2alfam2.cpp
@@ -11,19 +11,67 @@
#include "emu.h"
#include "a2alfam2.h"
+
#include "sound/sn76496.h"
+
#include "speaker.h"
-/***************************************************************************
- PARAMETERS
-***************************************************************************/
+#include <algorithm>
+
+
+namespace {
//**************************************************************************
-// GLOBAL VARIABLES
+// TYPE DEFINITIONS
//**************************************************************************
-DEFINE_DEVICE_TYPE(A2BUS_ALFAM2, a2bus_alfam2_device, "a2alfam2", "ALF MC1 / Apple Music II")
-DEFINE_DEVICE_TYPE(A2BUS_AESMS, a2bus_aesms_device, "a2aesms", "Applied Engineering Super Music Synthesizer")
+class a2bus_alfam2_device:
+ public device_t,
+ public device_a2bus_card_interface
+{
+public:
+ a2bus_alfam2_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) :
+ a2bus_alfam2_device(mconfig, A2BUS_ALFAM2, tag, owner, clock)
+ {
+ }
+
+protected:
+ // construction/destruction
+ a2bus_alfam2_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock);
+
+ virtual void device_start() override;
+ virtual void device_reset() override;
+ virtual void device_add_mconfig(machine_config &config) override;
+
+ // overrides of standard a2bus slot functions
+ virtual uint8_t read_c0nx(uint8_t offset) override;
+ virtual void write_c0nx(uint8_t offset, uint8_t data) override;
+ virtual bool take_c800() override { return false; }
+
+ required_device<sn76489_device> m_sn1;
+ required_device<sn76489_device> m_sn2;
+ required_device<sn76489_device> m_sn3;
+ optional_device<sn76489_device> m_sn4;
+
+private:
+ uint8_t m_latch[4];
+};
+
+class a2bus_aesms_device : public a2bus_alfam2_device
+{
+public:
+ a2bus_aesms_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) :
+ a2bus_alfam2_device(mconfig, A2BUS_AESMS, tag, owner, clock)
+ {
+ }
+
+protected:
+ virtual void device_add_mconfig(machine_config &config) override;
+};
+
+/***************************************************************************
+ PARAMETERS
+***************************************************************************/
#define SN1_TAG "sn76489_1" // left
#define SN2_TAG "sn76489_2" // center
@@ -39,16 +87,18 @@ DEFINE_DEVICE_TYPE(A2BUS_AESMS, a2bus_aesms_device, "a2aesms", "Applied Engin
// device_add_mconfig - add device configuration
//-------------------------------------------------
-void a2bus_sn76489_device::device_add_mconfig(machine_config &config)
+void a2bus_alfam2_device::device_add_mconfig(machine_config &config)
{
SPEAKER(config, "alf_l").front_left();
SPEAKER(config, "alf_r").front_right();
SN76489(config, m_sn1, 1020484);
m_sn1->add_route(ALL_OUTPUTS, "alf_l", 0.50);
+
SN76489(config, m_sn2, 1020484);
m_sn2->add_route(ALL_OUTPUTS, "alf_l", 0.50);
m_sn2->add_route(ALL_OUTPUTS, "alf_r", 0.50);
+
SN76489(config, m_sn3, 1020484);
m_sn3->add_route(ALL_OUTPUTS, "alf_r", 0.50);
}
@@ -77,98 +127,81 @@ void a2bus_aesms_device::device_add_mconfig(machine_config &config)
// LIVE DEVICE
//**************************************************************************
-a2bus_sn76489_device::a2bus_sn76489_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock) :
+a2bus_alfam2_device::a2bus_alfam2_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock) :
device_t(mconfig, type, tag, owner, clock),
device_a2bus_card_interface(mconfig, *this),
m_sn1(*this, SN1_TAG),
m_sn2(*this, SN2_TAG),
m_sn3(*this, SN3_TAG),
- m_sn4(*this, SN4_TAG), m_latch0(0), m_latch1(0), m_latch2(0), m_latch3(0), m_has4thsn(false)
+ m_sn4(*this, SN4_TAG),
+ m_latch{ 0, 0, 0, 0 }
{
}
-a2bus_alfam2_device::a2bus_alfam2_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) :
- a2bus_sn76489_device(mconfig, A2BUS_ALFAM2, tag, owner, clock)
-{
- m_has4thsn = false;
-}
-
-a2bus_aesms_device::a2bus_aesms_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) :
- a2bus_sn76489_device(mconfig, A2BUS_AESMS, tag, owner, clock)
-{
- m_has4thsn = true;
-}
-
//-------------------------------------------------
// device_start - device-specific startup
//-------------------------------------------------
-void a2bus_sn76489_device::device_start()
+void a2bus_alfam2_device::device_start()
{
- m_latch0 = m_latch1 = m_latch2 = m_latch3 = 0;
-
- save_item(NAME(m_latch0));
- save_item(NAME(m_latch1));
- save_item(NAME(m_latch2));
- save_item(NAME(m_latch3));
+ save_item(NAME(m_latch));
}
-void a2bus_sn76489_device::device_reset()
+void a2bus_alfam2_device::device_reset()
{
- m_latch0 = m_latch1 = m_latch2 = m_latch3 = 0;
+ std::fill(std::begin(m_latch), std::end(m_latch), 0);
}
-uint8_t a2bus_sn76489_device::read_c0nx(uint8_t offset)
+uint8_t a2bus_alfam2_device::read_c0nx(uint8_t offset)
{
// SN76489 can't be read, it appears from the schematics this is what happens
switch (offset)
{
case 0:
- return m_latch0;
-
case 1:
- return m_latch1;
-
case 2:
- return m_latch2;
-
case 3:
- return m_latch3;
+ return m_latch[offset];
}
return 0xff;
}
-void a2bus_sn76489_device::write_c0nx(uint8_t offset, uint8_t data)
+void a2bus_alfam2_device::write_c0nx(uint8_t offset, uint8_t data)
{
switch (offset)
{
case 0:
m_sn1->write(data);
- m_latch0 = data;
+ m_latch[0] = data;
break;
case 1:
m_sn2->write(data);
- m_latch1 = data;
+ m_latch[1] = data;
break;
case 2:
m_sn3->write(data);
- m_latch2 = data;
+ m_latch[2] = data;
break;
case 3:
- if (m_has4thsn)
+ if (m_sn4)
{
m_sn4->write(data);
- m_latch3 = data;
+ m_latch[3] = data;
}
break;
}
}
-bool a2bus_sn76489_device::take_c800()
-{
- return false;
-}
+} // anonymous namespace
+
+
+//**************************************************************************
+// GLOBAL VARIABLES
+//**************************************************************************
+
+DEFINE_DEVICE_TYPE_PRIVATE(A2BUS_ALFAM2, device_a2bus_card_interface, a2bus_alfam2_device, "a2alfam2", "ALF MC1 / Apple Music II")
+DEFINE_DEVICE_TYPE_PRIVATE(A2BUS_AESMS, device_a2bus_card_interface, a2bus_aesms_device, "a2aesms", "Applied Engineering Super Music Synthesizer")