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Diffstat (limited to 'src/devices/bus/sms_ctrl/sportsjp.c')
-rw-r--r--src/devices/bus/sms_ctrl/sportsjp.c156
1 files changed, 156 insertions, 0 deletions
diff --git a/src/devices/bus/sms_ctrl/sportsjp.c b/src/devices/bus/sms_ctrl/sportsjp.c
new file mode 100644
index 00000000000..d431f0a6816
--- /dev/null
+++ b/src/devices/bus/sms_ctrl/sportsjp.c
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+// license:BSD-3-Clause
+// copyright-holders:Fabio Priuli
+/**********************************************************************
+
+ Sega Master System "Sports Pad" (Japanese model) emulation
+
+**********************************************************************/
+
+// The Japanese Sports Pad controller is only required to play the cartridge
+// Sports Pad Soccer, released in Japan. It uses a different mode than the
+// used by the US model, due to missing output lines on Sega Mark III
+// controller ports.
+
+#include "sportsjp.h"
+
+
+
+//**************************************************************************
+// DEVICE DEFINITIONS
+//**************************************************************************
+
+const device_type SMS_SPORTS_PAD_JP = &device_creator<sms_sports_pad_jp_device>;
+
+
+#define SPORTS_PAD_JP_INTERVAL attotime::from_hz(30000) // 30Hz (not measured)
+
+
+DECLARE_CUSTOM_INPUT_MEMBER( sms_sports_pad_jp_device::dir_pins_r )
+{
+ UINT8 data = 0;
+
+ switch (m_read_state)
+ {
+ case 0:
+ data = m_sports_jp_x->read() >> 4;
+ break;
+ case 1:
+ data = m_sports_jp_x->read();
+ break;
+ case 2:
+ data = m_sports_jp_y->read() >> 4;
+ break;
+ case 3:
+ data = m_sports_jp_y->read();
+ break;
+ }
+
+ // The returned value is inverted due to IP_ACTIVE_LOW mapping.
+ return ~(data & 0x0f);
+}
+
+
+static INPUT_PORTS_START( sms_sports_pad_jp )
+ PORT_START("SPORTS_JP_IN")
+ PORT_BIT( 0x0f, IP_ACTIVE_LOW, IPT_SPECIAL ) PORT_CUSTOM_MEMBER(DEVICE_SELF, sms_sports_pad_jp_device, dir_pins_r, NULL) // Directional pins
+ PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_UNUSED ) // Vcc
+ PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON1 ) // TL (Button 1)
+ PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_UNUSED ) // TH
+ PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_BUTTON2 ) // TR (Button 2)
+
+ PORT_START("SPORTS_JP_X") /* Sports Pad X axis */
+ PORT_BIT( 0xff, 0x00, IPT_TRACKBALL_X ) PORT_SENSITIVITY(50) PORT_KEYDELTA(40)
+
+ PORT_START("SPORTS_JP_Y") /* Sports Pad Y axis */
+ PORT_BIT( 0xff, 0x00, IPT_TRACKBALL_Y ) PORT_SENSITIVITY(50) PORT_KEYDELTA(40)
+INPUT_PORTS_END
+
+
+//-------------------------------------------------
+// input_ports - device-specific input ports
+//-------------------------------------------------
+
+ioport_constructor sms_sports_pad_jp_device::device_input_ports() const
+{
+ return INPUT_PORTS_NAME( sms_sports_pad_jp );
+}
+
+
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+// sms_sports_pad_jp_device - constructor
+//-------------------------------------------------
+
+sms_sports_pad_jp_device::sms_sports_pad_jp_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
+ device_t(mconfig, SMS_SPORTS_PAD_JP, "Sega SMS Sports Pad JP", tag, owner, clock, "sms_sports_pad_jp", __FILE__),
+ device_sms_control_port_interface(mconfig, *this),
+ m_sports_jp_in(*this, "SPORTS_JP_IN"),
+ m_sports_jp_x(*this, "SPORTS_JP_X"),
+ m_sports_jp_y(*this, "SPORTS_JP_Y"),
+ m_read_state(0),
+ m_interval(SPORTS_PAD_JP_INTERVAL)
+{
+}
+
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void sms_sports_pad_jp_device::device_start()
+{
+ m_start_time = machine().time();
+
+ save_item(NAME(m_start_time));
+ save_item(NAME(m_read_state));
+}
+
+
+//-------------------------------------------------
+// sms_peripheral_r - sports pad read
+//-------------------------------------------------
+
+UINT8 sms_sports_pad_jp_device::peripheral_r()
+{
+ UINT8 data;
+ int num_intervals = (machine().time() - m_start_time).as_double() / m_interval.as_double();
+ m_read_state = num_intervals % 5;
+
+ data = m_sports_jp_in->read();
+
+ switch (m_read_state)
+ {
+ case 0:
+ // X high nibble
+ data &= ~0x20; // TL 0
+ data &= ~0x80; // TR 0
+ break;
+ case 1:
+ // X low nibble
+ data |= 0x20; // TL 1
+ data &= ~0x80; // TR 0
+ break;
+ case 2:
+ // Y high nibble
+ data &= ~0x20; // TL 0
+ data &= ~0x80; // TR 0
+ break;
+ case 3:
+ // Y low nibble
+ data |= 0x20; // TL 1
+ data &= ~0x80; // TR 0
+ break;
+ case 4:
+ // buttons 1 and 2
+ data = (data & 0x20) >> 5 | (data & 0x80) >> 6 | 0xfc;
+ data |= 0x20; // TL 1
+ data |= 0x80; // TR 1
+ break;
+ }
+
+ return data;
+}