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// 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()
{
}
//**************************************************************************
// IMPLEMENTATION
//**************************************************************************
uint8_t spectrum_kempjoy_device::iorq_r(offs_t offset)
{
uint8_t data = 0xff;
if (offset == 0x1f)
{
data = m_joy->read() & 0x1f;
}
return data;
}
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