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Diffstat (limited to 'src/devices/bus/nes_ctrl/partytap.c')
-rw-r--r--src/devices/bus/nes_ctrl/partytap.c107
1 files changed, 107 insertions, 0 deletions
diff --git a/src/devices/bus/nes_ctrl/partytap.c b/src/devices/bus/nes_ctrl/partytap.c
new file mode 100644
index 00000000000..3338a443423
--- /dev/null
+++ b/src/devices/bus/nes_ctrl/partytap.c
@@ -0,0 +1,107 @@
+// license:BSD-3-Clause
+// copyright-holders:Fabio Priuli
+/**********************************************************************
+
+ Nintendo Family Computer Yonezawa / PartyRoom 21 Party Tap Controller
+
+**********************************************************************/
+
+#include "partytap.h"
+
+//**************************************************************************
+// DEVICE DEFINITIONS
+//**************************************************************************
+
+const device_type NES_PARTYTAP = &device_creator<nes_partytap_device>;
+
+
+static INPUT_PORTS_START( nes_partytap )
+ PORT_START("INPUTS")
+ PORT_BIT( 0x03, IP_ACTIVE_HIGH, IPT_UNUSED )
+ PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_OTHER ) PORT_NAME("P1 Button") PORT_CODE(KEYCODE_Z)
+ PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_OTHER ) PORT_NAME("P2 Button") PORT_CODE(KEYCODE_X)
+ PORT_BIT( 0x10, IP_ACTIVE_HIGH, IPT_OTHER ) PORT_NAME("P3 Button") PORT_CODE(KEYCODE_C)
+ PORT_BIT( 0x20, IP_ACTIVE_HIGH, IPT_OTHER ) PORT_NAME("P4 Button") PORT_CODE(KEYCODE_V)
+ PORT_BIT( 0x40, IP_ACTIVE_HIGH, IPT_OTHER ) PORT_NAME("P5 Button") PORT_CODE(KEYCODE_B)
+ PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_OTHER ) PORT_NAME("P6 Button") PORT_CODE(KEYCODE_N)
+INPUT_PORTS_END
+
+//-------------------------------------------------
+// input_ports - device-specific input ports
+//-------------------------------------------------
+
+ioport_constructor nes_partytap_device::device_input_ports() const
+{
+ return INPUT_PORTS_NAME( nes_partytap );
+}
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+// nes_partytap_device - constructor
+//-------------------------------------------------
+
+nes_partytap_device::nes_partytap_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
+ device_t(mconfig, NES_PARTYTAP, "Yonezawa Party Tap Controller", tag, owner, clock, "nes_partytap", __FILE__),
+ device_nes_control_port_interface(mconfig, *this),
+ m_inputs(*this, "INPUTS")
+{
+}
+
+
+//-------------------------------------------------
+// device_start
+//-------------------------------------------------
+
+void nes_partytap_device::device_start()
+{
+ save_item(NAME(m_latch));
+ save_item(NAME(m_mode));
+}
+
+
+//-------------------------------------------------
+// device_reset
+//-------------------------------------------------
+
+void nes_partytap_device::device_reset()
+{
+ m_mode = 0xe0;
+ m_latch = 0;
+}
+
+
+//-------------------------------------------------
+// read
+//-------------------------------------------------
+
+UINT8 nes_partytap_device::read_exp(offs_t offset)
+{
+ UINT8 ret = 0;
+ if (offset == 1) //$4017
+ {
+ ret |= m_latch & 0x1c;
+ m_latch >>= 3;
+ // append mode bits
+ m_latch |= m_mode;
+ }
+ return ret;
+}
+
+//-------------------------------------------------
+// write
+//-------------------------------------------------
+
+void nes_partytap_device::write(UINT8 data)
+{
+ // inputs are read in two chunks of 3 bits, before the second one is read bit2 is written here
+ // probably a mechanism for the game to detect which group of inputs is being read
+ m_mode = BIT(data, 2) ? 0xa0 : 0xe0;
+
+ if (data & 0x01)
+ return;
+
+ m_latch = m_inputs->read();
+}