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// license:BSD-3-Clause
// copyright-holders:Nigel Barnes
/**********************************************************************
Protek Joystick Interface
**********************************************************************/
#include "emu.h"
#include "protek.h"
//**************************************************************************
// DEVICE DEFINITIONS
//**************************************************************************
DEFINE_DEVICE_TYPE(SPECTRUM_PROTEK, spectrum_protek_device, "spectrum_protek", "Protek Joystick Interface")
//-------------------------------------------------
// INPUT_PORTS( protek )
//-------------------------------------------------
static INPUT_PORTS_START( protek )
PORT_START("LINE3") /* 0xF7FE */
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT) PORT_8WAY
PORT_START("LINE4") /* 0xEFFE */
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_BUTTON1)
PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT) PORT_8WAY
PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_UP) PORT_8WAY
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN) PORT_8WAY
INPUT_PORTS_END
//-------------------------------------------------
// input_ports - device-specific input ports
//-------------------------------------------------
ioport_constructor spectrum_protek_device::device_input_ports() const
{
return INPUT_PORTS_NAME( protek );
}
//**************************************************************************
// LIVE DEVICE
//**************************************************************************
//-------------------------------------------------
// spectrum_protek_device - constructor
//-------------------------------------------------
spectrum_protek_device::spectrum_protek_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
: device_t(mconfig, SPECTRUM_PROTEK, tag, owner, clock)
, device_spectrum_expansion_interface(mconfig, *this)
, m_exp_line3(*this, "LINE3")
, m_exp_line4(*this, "LINE4")
{
}
//-------------------------------------------------
// device_start - device-specific startup
//-------------------------------------------------
void spectrum_protek_device::device_start()
{
}
//**************************************************************************
// IMPLEMENTATION
//**************************************************************************
uint8_t spectrum_protek_device::port_fe_r(offs_t offset)
{
uint8_t data = 0xff;
uint8_t lines = offset >> 8;
if ((lines & 8) == 0)
data = m_exp_line3->read() | (0xff ^ 0x10);
if ((lines & 16) == 0)
data = m_exp_line4->read() | (0xff ^ 0x1d);
return data;
}
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