diff options
Diffstat (limited to 'src/devices/bus/electron/fbjoy.cpp')
-rw-r--r-- | src/devices/bus/electron/fbjoy.cpp | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/src/devices/bus/electron/fbjoy.cpp b/src/devices/bus/electron/fbjoy.cpp new file mode 100644 index 00000000000..532df461f6a --- /dev/null +++ b/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; +} |