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Diffstat (limited to 'src/devices/bus/spectrum/kempjoy.cpp')
-rw-r--r-- | src/devices/bus/spectrum/kempjoy.cpp | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/src/devices/bus/spectrum/kempjoy.cpp b/src/devices/bus/spectrum/kempjoy.cpp new file mode 100644 index 00000000000..4f13fdc482f --- /dev/null +++ b/src/devices/bus/spectrum/kempjoy.cpp @@ -0,0 +1,88 @@ +// license:BSD-3-Clause +// copyright-holders:Nigel Barnes +/********************************************************************** + + Kempston Joystick Interface + +**********************************************************************/ + +#include "emu.h" +#include "kempjoy.h" + +//************************************************************************** +// DEVICE DEFINITIONS +//************************************************************************** + +DEFINE_DEVICE_TYPE(SPECTRUM_KEMPJOY, spectrum_kempjoy_device, "spectrum_kempjoy", "Kempston Joystick Interface") + + +//------------------------------------------------- +// INPUT_PORTS( kempjoy ) +//------------------------------------------------- + +static INPUT_PORTS_START( kempjoy ) + PORT_START("JOY") + PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_JOYSTICK_RIGHT) PORT_8WAY + PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_JOYSTICK_LEFT) PORT_8WAY + PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_JOYSTICK_DOWN) PORT_8WAY + PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_JOYSTICK_UP) PORT_8WAY + PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_BUTTON1) +INPUT_PORTS_END + + +//------------------------------------------------- +// input_ports - device-specific input ports +//------------------------------------------------- + +ioport_constructor spectrum_kempjoy_device::device_input_ports() const +{ + return INPUT_PORTS_NAME( kempjoy ); +} + + +//************************************************************************** +// LIVE DEVICE +//************************************************************************** + +//------------------------------------------------- +// spectrum_kempjoy_device - constructor +//------------------------------------------------- + +spectrum_kempjoy_device::spectrum_kempjoy_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) + : device_t(mconfig, SPECTRUM_KEMPJOY, tag, owner, clock) + , device_spectrum_expansion_interface(mconfig, *this) + , m_joy(*this, "JOY") +{ +} + + +//------------------------------------------------- +// device_start - device-specific startup +//------------------------------------------------- + +void spectrum_kempjoy_device::device_start() +{ + address_space& spaceio = machine().device("maincpu")->memory().space(AS_IO); + m_slot = dynamic_cast<spectrum_expansion_slot_device *>(owner()); + + spaceio.install_read_handler(0x1f, 0x1f, 0, 0xff00, 0, read8_delegate(FUNC(spectrum_kempjoy_device::joystick_r), this)); +} + + +//------------------------------------------------- +// device_reset - device-specific reset +//------------------------------------------------- + +void spectrum_kempjoy_device::device_reset() +{ +} + + +//************************************************************************** +// IMPLEMENTATION +//************************************************************************** + +READ8_MEMBER(spectrum_kempjoy_device::joystick_r) +{ + return m_joy->read() & 0x1f; +} |