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// copyright-holders:Curt Coder
/**********************************************************************
Luxor R8 mouse emulation
*********************************************************************/
#include "emu.h"
#include "r8.h"
//**************************************************************************
// DEVICE DEFINITIONS
//**************************************************************************
DEFINE_DEVICE_TYPE(LUXOR_R8, luxor_r8_device, "luxor_r8", "Luxor R8")
//-------------------------------------------------
// INPUT_PORTS( r8 )
//-------------------------------------------------
static INPUT_PORTS_START( r8 )
PORT_START("MOUSEB")
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_NAME("Left Mouse Button") PORT_CODE(MOUSECODE_BUTTON1)
PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_BUTTON3 ) PORT_NAME("Middle Mouse Button") PORT_CODE(MOUSECODE_BUTTON3)
PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_NAME("Right Mouse Button") PORT_CODE(MOUSECODE_BUTTON2)
PORT_START("MOUSEX")
PORT_BIT( 0xfff, 0x000, IPT_MOUSE_X ) PORT_SENSITIVITY(50)
PORT_START("MOUSEY")
PORT_BIT( 0xfff, 0x000, IPT_MOUSE_Y ) PORT_SENSITIVITY(50)
INPUT_PORTS_END
//-------------------------------------------------
// input_ports - device-specific input ports
//-------------------------------------------------
ioport_constructor luxor_r8_device::device_input_ports() const
{
return INPUT_PORTS_NAME( r8 );
}
//-------------------------------------------------
// scan_mouse -
//-------------------------------------------------
TIMER_CALLBACK_MEMBER(luxor_r8_device::scan_mouse)
{
switch(m_phase)
{
case 0:
m_xa = m_x > m_prev_x ? CLEAR_LINE : ASSERT_LINE;
m_xb = m_x < m_prev_x ? CLEAR_LINE : ASSERT_LINE;
m_ya = m_y > m_prev_y ? CLEAR_LINE : ASSERT_LINE;
m_yb = m_y < m_prev_y ? CLEAR_LINE : ASSERT_LINE;
break;
case 1:
m_xa = m_xb = m_x != m_prev_x ? CLEAR_LINE : ASSERT_LINE;
m_ya = m_yb = m_y != m_prev_y ? CLEAR_LINE : ASSERT_LINE;
break;
case 2:
m_xa = m_x < m_prev_x ? CLEAR_LINE : ASSERT_LINE;
m_xb = m_x > m_prev_x ? CLEAR_LINE : ASSERT_LINE;
m_ya = m_y < m_prev_y ? CLEAR_LINE : ASSERT_LINE;
m_yb = m_y > m_prev_y ? CLEAR_LINE : ASSERT_LINE;
break;
case 3:
m_xa = m_xb = ASSERT_LINE;
m_ya = m_yb = ASSERT_LINE;
m_prev_x = m_x;
m_prev_y = m_y;
m_x = m_mouse_x->read();
m_y = m_mouse_y->read();
break;
}
m_phase = (m_phase + 1) & 3;
}
//**************************************************************************
// LIVE DEVICE
//**************************************************************************
//-------------------------------------------------
// luxor_r8_device - constructor
//-------------------------------------------------
luxor_r8_device::luxor_r8_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) :
device_t(mconfig, LUXOR_R8, tag, owner, clock),
m_mouse_timer(nullptr),
m_mouse_b(*this, "MOUSEB"),
m_mouse_x(*this, "MOUSEX"),
m_mouse_y(*this, "MOUSEY")
{
}
//-------------------------------------------------
// device_start - device-specific startup
//-------------------------------------------------
void luxor_r8_device::device_start()
{
// allocate timers
m_mouse_timer = timer_alloc(FUNC(luxor_r8_device::scan_mouse), this);
m_mouse_timer->adjust(attotime::from_hz(1000), 0, attotime::from_hz(1000));
// state saving
save_item(NAME(m_phase));
save_item(NAME(m_x));
save_item(NAME(m_y));
save_item(NAME(m_prev_x));
save_item(NAME(m_prev_y));
save_item(NAME(m_xa));
save_item(NAME(m_xb));
save_item(NAME(m_ya));
save_item(NAME(m_yb));
}
//-------------------------------------------------
// device_reset - device-specific reset
//-------------------------------------------------
void luxor_r8_device::device_reset()
{
m_phase = 0;
m_xa = m_xb = ASSERT_LINE;
m_ya = m_yb = ASSERT_LINE;
m_x = m_y = 0;
m_prev_x = m_prev_y = 0;
}
//-------------------------------------------------
// read -
//-------------------------------------------------
u8 luxor_r8_device::read()
{
u8 data = 0;
// mouse movement
data |= m_xa;
data |= m_xb << 1;
data |= m_ya << 2;
data |= m_yb << 3;
// mouse buttons
data |= (m_mouse_b->read() & 0x07) << 4;
return data;
}
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