diff options
Diffstat (limited to 'src/devices/bus/msx/ctrl/hypershot.cpp')
-rw-r--r-- | src/devices/bus/msx/ctrl/hypershot.cpp | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/src/devices/bus/msx/ctrl/hypershot.cpp b/src/devices/bus/msx/ctrl/hypershot.cpp new file mode 100644 index 00000000000..1a7f7152018 --- /dev/null +++ b/src/devices/bus/msx/ctrl/hypershot.cpp @@ -0,0 +1,85 @@ +// license:BSD-3-Clause +// copyright-holders:Vas Crabb +/********************************************************************** + + Konami JE 502/JE 503 Hyper Shot emulation + + Very simple controller with two buttons. RUN is connected to + both right and down, and JUMP is connected to TL. Symmetrical + case allows use with either button to the left. Pin 8 is used + as the common pin so it will work with Sega and Atari consoles. + It will work with MSX computers provided pin 8 is pulled low. + + Known versions: + * JE 502 original Japanese version, metal case + * JE 503 cost-reduced Japanese version, plastic case + * JE 503-X02 cost-reduced export version, plastic case + +**********************************************************************/ + +#include "emu.h" +#include "hypershot.h" + + +namespace { + +INPUT_PORTS_START(hypershot) + PORT_START("BUTTONS") + PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_BUTTON2) PORT_NAME("%p Run") + PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_BUTTON1) PORT_NAME("%p Jump") +INPUT_PORTS_END + + +class hypershot_device : public device_t, public device_msx_general_purpose_port_interface +{ +public: + hypershot_device(machine_config const &mconfig, char const *tag, device_t *owner, u32 clock); + + virtual u8 read() override; + virtual void pin_8_w(int state) override; + +protected: + virtual void device_start() override ATTR_COLD; + virtual ioport_constructor device_input_ports() const override { return INPUT_PORTS_NAME(hypershot); } + +private: + required_ioport m_buttons; + + u8 m_pin8_in; +}; + +hypershot_device::hypershot_device(machine_config const &mconfig, char const *tag, device_t *owner, u32 clock) + : device_t(mconfig, MSX_HYPERSHOT, tag, owner, clock) + , device_msx_general_purpose_port_interface(mconfig, *this) + , m_buttons(*this, "BUTTONS") + , m_pin8_in(1) +{ +} + +u8 hypershot_device::read() +{ + if (m_pin8_in) + { + return 0xff; + } + else + { + u8 const inputs = m_buttons->read(); + return 0xe5 | (BIT(inputs, 1) << 4) | (BIT(inputs, 0) ? 0x0a : 0x00); + } +} + +void hypershot_device::pin_8_w(int state) +{ + m_pin8_in = state ? 1 : 0; +} + +void hypershot_device::device_start() +{ + save_item(NAME(m_pin8_in)); +} + +} // anonymous namespace + + +DEFINE_DEVICE_TYPE_PRIVATE(MSX_HYPERSHOT, device_msx_general_purpose_port_interface, hypershot_device, "msx_hypershot", "Konami Hyper Shot (JE 502/JE 503, MSX)") |