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spectrum: Added the Cheetah SpecDrum device.

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This commit is contained in:
Nigel Barnes 2019-03-14 14:01:32 +00:00
parent 596c68e755
commit 3a8fc3967b
4 changed files with 129 additions and 0 deletions
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2
scripts/src/bus.lua
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@ -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",

3
src/devices/bus/spectrum/exp.cpp
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@ -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)

73
src/devices/bus/spectrum/specdrum.cpp Normal file
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@ -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;
}
}

51
src/devices/bus/spectrum/specdrum.h Normal file
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@ -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