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-rw-r--r--src/devices/bus/snes_ctrl/mouse.c239
1 files changed, 239 insertions, 0 deletions
diff --git a/src/devices/bus/snes_ctrl/mouse.c b/src/devices/bus/snes_ctrl/mouse.c
new file mode 100644
index 00000000000..535b68d02bb
--- /dev/null
+++ b/src/devices/bus/snes_ctrl/mouse.c
@@ -0,0 +1,239 @@
+// license:BSD-3-Clause
+// copyright-holders:Fabio Priuli
+/**********************************************************************
+
+ Nintendo Super Famicom & SNES Mouse
+
+**********************************************************************/
+
+#include "mouse.h"
+
+//**************************************************************************
+// DEVICE DEFINITIONS
+//**************************************************************************
+
+const device_type SNES_MOUSE = &device_creator<snes_mouse_device>;
+
+
+static INPUT_PORTS_START( snes_mouse )
+ PORT_START("BUTTONS")
+ PORT_BIT( 0x00ff, IP_ACTIVE_HIGH, IPT_SPECIAL ) // these must be 0!
+ PORT_BIT( 0x0100, IP_ACTIVE_HIGH, IPT_BUTTON2 ) PORT_NAME("Button Right")
+ PORT_BIT( 0x0200, IP_ACTIVE_HIGH, IPT_BUTTON1 ) PORT_NAME("Button Left")
+ PORT_BIT( 0x0c00, IP_ACTIVE_HIGH, IPT_UNUSED ) // mouse speed: 0 = slow, 1 = normal, 2 = fast, 3 = unused
+ PORT_BIT( 0x1000, IP_ACTIVE_HIGH, IPT_UNUSED )
+ PORT_BIT( 0x2000, IP_ACTIVE_HIGH, IPT_UNUSED )
+ PORT_BIT( 0x4000, IP_ACTIVE_HIGH, IPT_UNUSED )
+ PORT_BIT( 0x8000, IP_ACTIVE_LOW, IPT_UNUSED )
+
+ // we use IPT_LIGHTGUN instead of IPT_MOUSE to avoid input to wrap when you reach the screen border
+ // due to the relative nature of movement detection in SNES mouse, when we wrap the system would
+ // detect a sudden jump in the wrong direction, making the usage unfriendly...
+ PORT_START("MOUSE_X")
+ PORT_BIT( 0x1ff, 0x100, IPT_LIGHTGUN_X ) PORT_NAME("Superscope X Axis") PORT_SENSITIVITY(30) PORT_KEYDELTA(5)
+// PORT_BIT( 0xff, 0x00, IPT_MOUSE_X) PORT_SENSITIVITY(30) PORT_KEYDELTA(5)
+
+ PORT_START("MOUSE_Y")
+ PORT_BIT( 0x1ff, 0x100, IPT_LIGHTGUN_Y) PORT_NAME("Superscope Y Axis") PORT_SENSITIVITY(30) PORT_KEYDELTA(5)
+// PORT_BIT( 0xff, 0x00, IPT_MOUSE_Y) PORT_SENSITIVITY(30) PORT_KEYDELTA(5)
+INPUT_PORTS_END
+
+
+//-------------------------------------------------
+// input_ports - device-specific input ports
+//-------------------------------------------------
+
+ioport_constructor snes_mouse_device::device_input_ports() const
+{
+ return INPUT_PORTS_NAME( snes_mouse );
+}
+
+
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+// snes_mouse_device - constructor
+//-------------------------------------------------
+
+snes_mouse_device::snes_mouse_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
+ device_t(mconfig, SNES_MOUSE, "Nintendo SNES / SFC Mouse Controller", tag, owner, clock, "snes_mouse", __FILE__),
+ device_snes_control_port_interface(mconfig, *this),
+ m_buttons(*this, "BUTTONS"),
+ m_xaxis(*this, "MOUSE_X"),
+ m_yaxis(*this, "MOUSE_Y")
+{
+}
+
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void snes_mouse_device::device_start()
+{
+ save_item(NAME(m_strobe));
+ save_item(NAME(m_idx));
+ save_item(NAME(m_latch));
+ save_item(NAME(m_x));
+ save_item(NAME(m_y));
+ save_item(NAME(m_oldx));
+ save_item(NAME(m_oldy));
+ save_item(NAME(m_deltax));
+ save_item(NAME(m_deltay));
+ save_item(NAME(m_speed));
+ save_item(NAME(m_dirx));
+ save_item(NAME(m_diry));
+}
+
+
+//-------------------------------------------------
+// device_reset - device-specific reset
+//-------------------------------------------------
+
+void snes_mouse_device::device_reset()
+{
+ m_strobe = 0;
+ m_idx = 0;
+ m_latch = 0;
+ m_x = 0;
+ m_y = 0;
+ m_oldx = 0;
+ m_oldy = 0;
+ m_deltax = 0;
+ m_deltay = 0;
+ m_speed = 0;
+ m_dirx = -1;
+ m_diry = -1;
+}
+
+
+//-------------------------------------------------
+// poll
+//-------------------------------------------------
+
+void snes_mouse_device::port_poll()
+{
+ INT16 var;
+ int new_dir;
+ m_idx = 0;
+ m_latch = m_buttons->read();
+
+ m_oldx = m_x;
+ m_oldy = m_y;
+ m_x = m_xaxis->read();
+ m_y = m_yaxis->read();
+
+ var = m_x - m_oldx;
+ if (var)
+ {
+ new_dir = (var < 0) ? 1 : 0;
+ if (m_dirx != new_dir)
+ m_dirx = new_dir;
+ }
+
+ if (var < -127)
+ {
+ m_deltax = 0x7f;
+ m_oldx -= 127;
+ }
+ else if (var < 0)
+ {
+ m_deltax = -var;
+ m_oldx = m_x;
+ }
+ else if (var > 127)
+ {
+ m_deltax = 0x7f;
+ m_oldx += 127;
+ }
+ else
+ {
+ m_deltax = var;
+ m_oldx = m_x;
+ }
+
+ var = m_y - m_oldy;
+ if (var)
+ {
+ new_dir = (var < 0) ? 1 : 0;
+ if (m_diry != new_dir)
+ m_diry = new_dir;
+ }
+
+ if (var < -127)
+ {
+ m_deltay = 0x7f;
+ m_oldy -= 127;
+ }
+ else if (var < 0)
+ {
+ m_deltay = -var;
+ m_oldy = m_y;
+ }
+ else if (var > 127)
+ {
+ m_deltay = 0x7f;
+ m_oldy += 127;
+ }
+ else
+ {
+ m_deltay = var;
+ m_oldy = m_y;
+ }
+
+ m_deltax |= (m_dirx << 7);
+ m_deltay |= (m_diry << 7);
+}
+
+//-------------------------------------------------
+// read
+//-------------------------------------------------
+
+UINT8 snes_mouse_device::read_pin4()
+{
+ UINT8 res = 0;
+
+ if (m_strobe == 1)
+ {
+ // reading with strobe 1, changes mouse speed
+ m_speed = (m_speed + 1) % 3;
+ return res;
+ }
+
+ if (m_idx >= 32)
+ res |= 0x01;
+ else if (m_idx >= 24)
+ res |= BIT(m_deltax, (31 - m_idx++));
+ else if (m_idx >= 16)
+ res |= BIT(m_deltay, (23 - m_idx++));
+ else if (m_idx == 11)
+ {
+ res |= BIT(m_speed, 0);
+ m_idx++;
+ }
+ else if (m_idx == 10)
+ {
+ res |= BIT(m_speed, 1);
+ m_idx++;
+ }
+ else
+ res |= BIT(m_latch, m_idx++);
+
+ return res;
+}
+
+//-------------------------------------------------
+// write
+//-------------------------------------------------
+
+void snes_mouse_device::write_strobe(UINT8 data)
+{
+ int old = m_strobe;
+ m_strobe = data & 0x01;
+
+ if (m_strobe < old) // 1 -> 0 transition
+ port_poll();
+}