bk: parallel expansion slot and carts

scripts/src/bus.lua

@@ -900,6 +900,31 @@ if (BUSES["BBC_VSP"]~=null) then
 end
 
 
+---------------------------------------------------
+--
+--@src/devices/bus/bk/parallel.h,BUSES["BK_PARALLEL"] = true
+---------------------------------------------------
+
+if (BUSES["BK_PARALLEL"]~=null) then
+	files {
+		MAME_DIR .. "src/devices/bus/bk/parallel.cpp",
+		MAME_DIR .. "src/devices/bus/bk/parallel.h",
+		MAME_DIR .. "src/devices/bus/bk/carts.cpp",
+		MAME_DIR .. "src/devices/bus/bk/carts.h",
+		MAME_DIR .. "src/devices/bus/bk/ay.cpp",
+		MAME_DIR .. "src/devices/bus/bk/ay.h",
+		MAME_DIR .. "src/devices/bus/bk/covox.cpp",
+		MAME_DIR .. "src/devices/bus/bk/covox.h",
+		MAME_DIR .. "src/devices/bus/bk/joystick.cpp",
+		MAME_DIR .. "src/devices/bus/bk/joystick.h",
+		MAME_DIR .. "src/devices/bus/bk/loopback.cpp",
+		MAME_DIR .. "src/devices/bus/bk/loopback.h",
+		MAME_DIR .. "src/devices/bus/bk/printer.cpp",
+		MAME_DIR .. "src/devices/bus/bk/printer.h",
+	}
+end
+
+
 ---------------------------------------------------
 --
 --@src/devices/bus/bw2/exp.h,BUSES["BW2"] = true

src/devices/bus/bk/ay.cpp

@@ -0,0 +1,79 @@
+// license:BSD-3-Clause
+// copyright-holders:Sergey Svishchev
+/***************************************************************************
+
+    AY mod (1.667 MHz clock).
+
+    Variants of the mod used 1.5 or 1.75 MHz clock.
+
+    Reads are passed through to external slot, usually occupied by
+    joystick interface.
+
+***************************************************************************/
+
+#include "emu.h"
+#include "ay.h"
+
+
+//**************************************************************************
+//  CONSTANTS/MACROS
+//**************************************************************************
+
+#define VERBOSE 0
+
+
+//**************************************************************************
+//  DEVICE DEFINITIONS
+//**************************************************************************
+
+DEFINE_DEVICE_TYPE(BK_AY, bk_ay_device, "bk_ay", "Single AY Interface")
+
+
+//**************************************************************************
+//  LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+//  bk_ay_device - constructor
+//-------------------------------------------------
+
+bk_ay_device::bk_ay_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
+	: device_t(mconfig, BK_AY, tag, owner, clock)
+	, device_bk_parallel_interface(mconfig, *this)
+	, m_ay(*this, "ay")
+	, m_up(*this, "up")
+{
+}
+
+
+//**************************************************************************
+//  IMPLEMENTATION
+//**************************************************************************
+
+void bk_ay_device::device_add_mconfig(machine_config &config)
+{
+	SPEAKER(config, "lspeaker").front_left();
+	SPEAKER(config, "rspeaker").front_right();
+
+	YM2149(config, m_ay, 1667000);
+	m_ay->add_route(0, "rspeaker", 0.5);
+	m_ay->add_route(2, "rspeaker", 0.5);
+	m_ay->add_route(1, "lspeaker", 0.5);
+	m_ay->add_route(2, "lspeaker", 0.5);
+
+	BK_PARALLEL_SLOT(config, m_up, DERIVED_CLOCK(1, 1), bk_parallel_devices, nullptr);
+}
+
+uint16_t bk_ay_device::io_r()
+{
+	return m_up->read() ^ 0xffff;
+}
+
+void bk_ay_device::io_w(uint16_t data, bool word)
+{
+	if (word)
+		m_ay->address_w(data);
+	else
+		m_ay->data_w(data);
+	m_up->write(0, data ^ 0xffff, word);
+}

src/devices/bus/bk/ay.h

@@ -0,0 +1,50 @@
+// license:BSD-3-Clause
+// copyright-holders:Sergey Svishchev
+/***************************************************************************
+
+    AY mod
+
+***************************************************************************/
+
+#ifndef MAME_BUS_BK_AY_H
+#define MAME_BUS_BK_AY_H
+
+#pragma once
+
+#include "parallel.h"
+
+#include "sound.h"
+#include "sound/ay8910.h"
+#include "speaker.h"
+
+
+//**************************************************************************
+//  TYPE DEFINITIONS
+//**************************************************************************
+
+// ======================> bk_ay_device
+
+class bk_ay_device : public device_t, public device_bk_parallel_interface
+{
+public:
+	// construction/destruction
+	bk_ay_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
+
+protected:
+	virtual void device_start() override {};
+	virtual void device_reset() override {};
+
+	virtual uint16_t io_r() override;
+	virtual void io_w(uint16_t data, bool word) override;
+
+private:
+	virtual void device_add_mconfig(machine_config &config) override;
+
+	required_device<ym2149_device> m_ay;
+	required_device<bk_parallel_slot_device> m_up;
+};
+
+// device type definition
+DECLARE_DEVICE_TYPE(BK_AY, bk_ay_device)
+
+#endif // MAME_BUS_BK_AY_H

src/devices/bus/bk/carts.cpp

@@ -0,0 +1,26 @@
+// license:BSD-3-Clause
+// copyright-holders:Sergey Svishchev
+/***************************************************************************
+
+    BK parallel slot carts
+
+***************************************************************************/
+
+#include "emu.h"
+#include "carts.h"
+
+#include "ay.h"
+#include "covox.h"
+#include "joystick.h"
+#include "loopback.h"
+#include "printer.h"
+
+
+void bk_parallel_devices(device_slot_interface &device)
+{
+	device.option_add("ay", BK_AY);
+	device.option_add("covox", BK_COVOX);
+	device.option_add("joystick", BK_JOYSTICK);
+	device.option_add("loopback", BK_LOOPBACK);
+	device.option_add("printer", BK_PRINTER);
+}

src/devices/bus/bk/carts.h

@@ -0,0 +1,17 @@
+// license:BSD-3-Clause
+// copyright-holders:Sergey Svishchev
+/***************************************************************************
+
+    BK parallel slot carts
+
+***************************************************************************/
+
+#ifndef MAME_BUS_BK_CARTS_H
+#define MAME_BUS_BK_CARTS_H
+
+#pragma once
+
+
+void bk_parallel_devices(device_slot_interface &device);
+
+#endif // MAME_BUS_BK_CARTS_H

src/devices/bus/bk/covox.cpp

@@ -0,0 +1,72 @@
+// license:BSD-3-Clause
+// copyright-holders:Sergey Svishchev
+/***************************************************************************
+
+    Mono Covox interface with passthrough for loopback cart
+    (used by "In Your Space" demo.)
+
+***************************************************************************/
+
+#include "emu.h"
+#include "covox.h"
+
+
+//**************************************************************************
+//  CONSTANTS/MACROS
+//**************************************************************************
+
+#define VERBOSE 0
+
+
+//**************************************************************************
+//  DEVICE DEFINITIONS
+//**************************************************************************
+
+DEFINE_DEVICE_TYPE(BK_COVOX, bk_covox_device, "bk_covox", "Mono Covox Interface")
+
+
+//**************************************************************************
+//  LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+//  bk_covox_device - constructor
+//-------------------------------------------------
+
+bk_covox_device::bk_covox_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
+	: device_t(mconfig, BK_COVOX, tag, owner, clock)
+	, device_bk_parallel_interface(mconfig, *this)
+	, m_dac(*this, "dac")
+	, m_up(*this, "up")
+{
+}
+
+
+//**************************************************************************
+//  IMPLEMENTATION
+//**************************************************************************
+
+void bk_covox_device::device_add_mconfig(machine_config &config)
+{
+	SPEAKER(config, "covox").front_center();
+	DAC_8BIT_R2R(config, m_dac, 0).add_route(ALL_OUTPUTS, "covox", 0.5); // unknown DAC
+
+	BK_PARALLEL_SLOT(config, m_up, DERIVED_CLOCK(1, 1), bk_parallel_devices, nullptr);
+}
+
+void bk_covox_device::device_start()
+{
+	save_item(NAME(m_data));
+}
+
+uint16_t bk_covox_device::io_r()
+{
+	return m_up->read() ^ 0xffff;
+}
+
+void bk_covox_device::io_w(uint16_t data, bool word)
+{
+	m_data = data;
+	m_dac->write(data);
+	m_up->write(0, data ^ 0xffff, word);
+}

src/devices/bus/bk/covox.h

@@ -0,0 +1,51 @@
+// license:BSD-3-Clause
+// copyright-holders:Sergey Svishchev
+/***************************************************************************
+
+    Mono Covox interface
+
+***************************************************************************/
+
+#ifndef MAME_BUS_BK_COVOX_H
+#define MAME_BUS_BK_COVOX_H
+
+#pragma once
+
+#include "parallel.h"
+
+#include "sound/dac.h"
+#include "speaker.h"
+
+
+//**************************************************************************
+//  TYPE DEFINITIONS
+//**************************************************************************
+
+// ======================> bk_covox_device
+
+class bk_covox_device : public device_t, public device_bk_parallel_interface
+{
+public:
+	// construction/destruction
+	bk_covox_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
+
+protected:
+	virtual void device_start() override;
+	virtual void device_reset() override { m_data = 0; };
+
+	virtual uint16_t io_r() override;
+	virtual void io_w(uint16_t data, bool word) override;
+
+private:
+	virtual void device_add_mconfig(machine_config &config) override;
+
+	required_device<dac_byte_interface> m_dac;
+	required_device<bk_parallel_slot_device> m_up;
+
+	uint16_t m_data;
+};
+
+// device type definition
+DECLARE_DEVICE_TYPE(BK_COVOX, bk_covox_device)
+
+#endif // MAME_BUS_BK_COVOX_H