diff options
Diffstat (limited to 'src/emu/bus/sms_ctrl/sportsjp.c')
-rw-r--r-- | src/emu/bus/sms_ctrl/sportsjp.c | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/src/emu/bus/sms_ctrl/sportsjp.c b/src/emu/bus/sms_ctrl/sportsjp.c new file mode 100644 index 00000000000..a9b181c1ee6 --- /dev/null +++ b/src/emu/bus/sms_ctrl/sportsjp.c @@ -0,0 +1,157 @@ +/********************************************************************** + + Sega Master System "Sports Pad" (japanese model) emulation + + Copyright MESS Team. + Visit http://mamedev.org for licensing and usage restrictions. + +**********************************************************************/ + +// 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, "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_interval(SPORTS_PAD_JP_INTERVAL) +{ +} + + +//------------------------------------------------- +// device_start - device-specific startup +//------------------------------------------------- + +void sms_sports_pad_jp_device::device_start() +{ + m_start_time = machine().time(); + m_read_state = 0; + + 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; +} |