electron: Added First Byte joystick interface

scripts/src/bus.lua

@@ -692,6 +692,8 @@ if (BUSES["ELECTRON"]~=null) then
 	files {
 		MAME_DIR .. "src/devices/bus/electron/exp.cpp",
 		MAME_DIR .. "src/devices/bus/electron/exp.h",
+		MAME_DIR .. "src/devices/bus/electron/fbjoy.cpp",
+		MAME_DIR .. "src/devices/bus/electron/fbjoy.h",
 		MAME_DIR .. "src/devices/bus/electron/plus3.cpp",
 		MAME_DIR .. "src/devices/bus/electron/plus3.h",
 		MAME_DIR .. "src/devices/bus/electron/m2105.cpp",

src/devices/bus/electron/exp.cpp

@@ -100,21 +100,28 @@ void electron_expansion_slot_device::device_reset()
 
 
 // slot devices
+#include "fbjoy.h"
+//#include "fbprint.h"
+//#include "jafamode7.h"
 //#include "plus1.h"
 #include "plus3.h"
-//#include "aplus3.h"
+//#include "pwrjoy.h"
-//#include "aplus5.h"
+//#include "rombox.h"
-//#include "slogger.h"
+//#include "romboxplus.h"
-//#include "fbjoy.h"
 #include "m2105.h"
+//#include "voxbox.h"
 
 
 SLOT_INTERFACE_START( electron_expansion_devices )
+	//SLOT_INTERFACE("ap1", ELECTRON_AP1)
+	SLOT_INTERFACE("fbjoy", ELECTRON_FBJOY)
+	//SLOT_INTERFACE("fbprint", ELECTRON_FBPRINT)
+	//SLOT_INTERFACE("jafamode7", ELECTRON_JAFAMODE7)
 	//SLOT_INTERFACE("plus1", ELECTRON_PLUS1)
 	SLOT_INTERFACE("plus3", ELECTRON_PLUS3)
-	//SLOT_INTERFACE("aplus3", ELECTRON_APLUS3)
+	//SLOT_INTERFACE("pwrjoy", ELECTRON_PWRJOY)
-	//SLOT_INTERFACE("aplus5", ELECTRON_APLUS5)
+	//SLOT_INTERFACE("rombox", ELECTRON_ROMBOX)
-	//SLOT_INTERFACE("slogger", ELECTRON_SLOGGER)
+	//SLOT_INTERFACE("romboxplus", ELECTRON_ROMBOXPLUS)
-	//SLOT_INTERFACE("fbjoy", ELECTRON_FBJOY)
 	SLOT_INTERFACE("m2105", ELECTRON_M2105)
+	//SLOT_INTERFACE("voxbox", ELECTRON_VOXBOX)
 SLOT_INTERFACE_END

src/devices/bus/electron/fbjoy.cpp

@@ -0,0 +1,86 @@
+// license:BSD-3-Clause
+// copyright-holders:Nigel Barnes
+/**********************************************************************
+
+    First Byte Switched Joystick Interface
+
+    http://chrisacorns.computinghistory.org.uk/8bit_Upgrades/FirstByte_JoystickIF.html
+
+**********************************************************************/
+
+#include "emu.h"
+#include "fbjoy.h"
+
+//**************************************************************************
+//  DEVICE DEFINITIONS
+//**************************************************************************
+
+const device_type ELECTRON_FBJOY = device_creator<electron_fbjoy_device>;
+
+
+static INPUT_PORTS_START( fbjoy )
+	PORT_START("JOY")
+	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_UP) PORT_8WAY
+	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN) PORT_8WAY
+	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT) PORT_8WAY
+	PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT) PORT_8WAY
+	PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_BUTTON1) PORT_NAME("Fire")
+INPUT_PORTS_END
+
+
+//-------------------------------------------------
+//  input_ports - device-specific input ports
+//-------------------------------------------------
+
+ioport_constructor electron_fbjoy_device::device_input_ports() const
+{
+	return INPUT_PORTS_NAME( fbjoy );
+}
+
+
+//**************************************************************************
+//  LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+//  electron_fbjoy_device - constructor
+//-------------------------------------------------
+
+electron_fbjoy_device::electron_fbjoy_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
+	: device_t(mconfig, ELECTRON_FBJOY, "First Byte Joystick Interface", tag, owner, clock, "electron_fbjoy", __FILE__),
+	device_electron_expansion_interface(mconfig, *this),
+	m_joy(*this, "JOY")
+{
+}
+
+
+//-------------------------------------------------
+//  device_start - device-specific startup
+//-------------------------------------------------
+
+void electron_fbjoy_device::device_start()
+{
+	address_space& space = machine().device("maincpu")->memory().space(AS_PROGRAM);
+	m_slot = dynamic_cast<electron_expansion_slot_device *>(owner());
+
+	space.install_read_handler(0xfcc0, 0xfcc0, READ8_DELEGATE(electron_fbjoy_device, joystick_r));
+}
+
+
+//-------------------------------------------------
+//  device_reset - device-specific reset
+//-------------------------------------------------
+
+void electron_fbjoy_device::device_reset()
+{
+}
+
+
+//**************************************************************************
+//  IMPLEMENTATION
+//**************************************************************************
+
+READ8_MEMBER(electron_fbjoy_device::joystick_r)
+{
+	return m_joy->read() | 0xe0;
+}

src/devices/bus/electron/fbjoy.h

@@ -0,0 +1,52 @@
+// license:BSD-3-Clause
+// copyright-holders:Nigel Barnes
+/**********************************************************************
+
+    First Byte Switched Joystick Interface
+
+    http://chrisacorns.computinghistory.org.uk/8bit_Upgrades/FirstByte_JoystickIF.html
+
+**********************************************************************/
+
+#pragma once
+
+#ifndef __ELECTRON_FBJOY__
+#define __ELECTRON_FBJOY__
+
+
+#include "exp.h"
+
+//**************************************************************************
+//  TYPE DEFINITIONS
+//**************************************************************************
+
+// ======================> electron_fbjoy_device
+
+class electron_fbjoy_device :
+	public device_t,
+	public device_electron_expansion_interface
+{
+public:
+	// construction/destruction
+	electron_fbjoy_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
+
+	// optional information overrides
+	virtual ioport_constructor device_input_ports() const override;
+
+	DECLARE_READ8_MEMBER(joystick_r);
+
+protected:
+	// device-level overrides
+	virtual void device_start() override;
+	virtual void device_reset() override;
+
+private:
+	required_ioport m_joy;
+};
+
+
+// device type definition
+extern const device_type ELECTRON_FBJOY;
+
+
+#endif