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-rw-r--r--src/devices/bus/electron/fbjoy.cpp86
1 files changed, 86 insertions, 0 deletions
diff --git a/src/devices/bus/electron/fbjoy.cpp b/src/devices/bus/electron/fbjoy.cpp
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+++ b/src/devices/bus/electron/fbjoy.cpp
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+// 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;
+}