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author Nigel Barnes <Pernod70@users.noreply.github.com>2019-03-14 14:01:32 +0000
committer Nigel Barnes <Pernod70@users.noreply.github.com>2019-03-14 14:01:32 +0000
commit3a8fc3967b1632117ecaff849dcbd4e924d34e75 (patch)
tree1e7baff821f2cc126a7894b3785f7cc82598d33f
parent596c68e75559ef3b8f4aba82f3347091fbfde02e (diff)
spectrum: Added the Cheetah SpecDrum device.
-rw-r--r--scripts/src/bus.lua2
-rw-r--r--src/devices/bus/spectrum/exp.cpp3
-rw-r--r--src/devices/bus/spectrum/specdrum.cpp73
-rw-r--r--src/devices/bus/spectrum/specdrum.h51
4 files changed, 129 insertions, 0 deletions
diff --git a/scripts/src/bus.lua b/scripts/src/bus.lua
index b12bd630ce2..142927e64e0 100644
--- a/scripts/src/bus.lua
+++ b/scripts/src/bus.lua
@@ -3307,6 +3307,8 @@ if (BUSES["SPECTRUM"]~=null) then
MAME_DIR .. "src/devices/bus/spectrum/plus2test.h",
MAME_DIR .. "src/devices/bus/spectrum/protek.cpp",
MAME_DIR .. "src/devices/bus/spectrum/protek.h",
+ MAME_DIR .. "src/devices/bus/spectrum/specdrum.cpp",
+ MAME_DIR .. "src/devices/bus/spectrum/specdrum.h",
MAME_DIR .. "src/devices/bus/spectrum/uslot.cpp",
MAME_DIR .. "src/devices/bus/spectrum/uslot.h",
MAME_DIR .. "src/devices/bus/spectrum/usource.cpp",
diff --git a/src/devices/bus/spectrum/exp.cpp b/src/devices/bus/spectrum/exp.cpp
index ec71d31617a..b93be6c7162 100644
--- a/src/devices/bus/spectrum/exp.cpp
+++ b/src/devices/bus/spectrum/exp.cpp
@@ -171,6 +171,7 @@ void spectrum_expansion_slot_device::mreq_w(offs_t offset, uint8_t data)
#include "plus2test.h"
//#include "plusd.h"
#include "protek.h"
+#include "specdrum.h"
#include "uslot.h"
#include "usource.h"
#include "uspeech.h"
@@ -192,6 +193,7 @@ void spectrum_expansion_devices(device_slot_interface &device)
//device.option_add("opus", SPECTRUM_OPUS);
//device.option_add("plusd", SPECTRUM_PLUSD);
device.option_add("protek", SPECTRUM_PROTEK);
+ device.option_add("specdrum", SPECTRUM_SPECDRUM);
device.option_add("uslot", SPECTRUM_USLOT);
device.option_add("usource", SPECTRUM_USOURCE);
device.option_add("uspeech", SPECTRUM_USPEECH);
@@ -209,6 +211,7 @@ void spec128_expansion_devices(device_slot_interface &device)
device.option_add("mprint", SPECTRUM_MPRINT);
device.option_add("plus2test", SPECTRUM_PLUS2TEST);
device.option_add("protek", SPECTRUM_PROTEK);
+ device.option_add("specdrum", SPECTRUM_SPECDRUM);
}
void specpls3_expansion_devices(device_slot_interface &device)
diff --git a/src/devices/bus/spectrum/specdrum.cpp b/src/devices/bus/spectrum/specdrum.cpp
new file mode 100644
index 00000000000..9c809a1b36a
--- /dev/null
+++ b/src/devices/bus/spectrum/specdrum.cpp
@@ -0,0 +1,73 @@
+// license:BSD-3-Clause
+// copyright-holders:Nigel Barnes
+/**********************************************************************
+
+ Cheetah Marketing SpecDrum emulation
+
+**********************************************************************/
+
+#include "emu.h"
+#include "specdrum.h"
+#include "sound/volt_reg.h"
+#include "speaker.h"
+
+
+//**************************************************************************
+// DEVICE DEFINITIONS
+//**************************************************************************
+
+DEFINE_DEVICE_TYPE(SPECTRUM_SPECDRUM, spectrum_specdrum_device, "spectrum_specdrum", "SpecDrum")
+
+
+//-------------------------------------------------
+// device_add_mconfig - add device configuration
+//-------------------------------------------------
+
+void spectrum_specdrum_device::device_add_mconfig(machine_config &config)
+{
+ SPEAKER(config, "speaker").front_center();
+ ZN428E(config, m_dac, 0).add_route(ALL_OUTPUTS, "speaker", 0.5);
+ voltage_regulator_device &vref(VOLTAGE_REGULATOR(config, "vref"));
+ vref.add_route(0, "dac", 1.0, DAC_VREF_POS_INPUT);
+ vref.add_route(0, "dac", -1.0, DAC_VREF_NEG_INPUT);
+}
+
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+// spectrum_specdrum_device - constructor
+//-------------------------------------------------
+
+spectrum_specdrum_device::spectrum_specdrum_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
+ : device_t(mconfig, SPECTRUM_SPECDRUM, tag, owner, clock)
+ , device_spectrum_expansion_interface(mconfig, *this)
+ , m_dac(*this, "dac")
+{
+}
+
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void spectrum_specdrum_device::device_start()
+{
+}
+
+
+//**************************************************************************
+// IMPLEMENTATION
+//**************************************************************************
+
+void spectrum_specdrum_device::iorq_w(offs_t offset, uint8_t data)
+{
+ switch (offset & 0x00ff)
+ {
+ case 0xdf:
+ m_dac->write(data);
+ break;
+ }
+}
diff --git a/src/devices/bus/spectrum/specdrum.h b/src/devices/bus/spectrum/specdrum.h
new file mode 100644
index 00000000000..7412a8509c0
--- /dev/null
+++ b/src/devices/bus/spectrum/specdrum.h
@@ -0,0 +1,51 @@
+// license:BSD-3-Clause
+// copyright-holders:Nigel Barnes
+/**********************************************************************
+
+ Cheetah Marketing SpecDrum emulation
+
+**********************************************************************/
+
+#ifndef MAME_BUS_SPECTRUM_SPECDRUM_H
+#define MAME_BUS_SPECTRUM_SPECDRUM_H
+
+#pragma once
+
+
+#include "exp.h"
+#include "sound/dac.h"
+
+
+//**************************************************************************
+// TYPE DEFINITIONS
+//**************************************************************************
+
+// ======================> spectrum_specdrum_device
+
+class spectrum_specdrum_device :
+ public device_t,
+ public device_spectrum_expansion_interface
+{
+public:
+ // construction/destruction
+ spectrum_specdrum_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
+
+protected:
+ // device-level overrides
+ virtual void device_start() override;
+
+ // optional information overrides
+ virtual void device_add_mconfig(machine_config &config) override;
+
+ virtual void iorq_w(offs_t offset, uint8_t data) override;
+
+private:
+ required_device<dac_byte_interface> m_dac;
+};
+
+
+// device type definition
+DECLARE_DEVICE_TYPE(SPECTRUM_SPECDRUM, spectrum_specdrum_device)
+
+
+#endif // MAME_BUS_SPECTRUM_SPECDRUM_H