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Diffstat (limited to 'src/devices/bus/vcs_ctrl/joystick.c')
-rw-r--r--src/devices/bus/vcs_ctrl/joystick.c74
1 files changed, 74 insertions, 0 deletions
diff --git a/src/devices/bus/vcs_ctrl/joystick.c b/src/devices/bus/vcs_ctrl/joystick.c
new file mode 100644
index 00000000000..f1539eabeef
--- /dev/null
+++ b/src/devices/bus/vcs_ctrl/joystick.c
@@ -0,0 +1,74 @@
+// license:BSD-3-Clause
+// copyright-holders:Curt Coder
+/**********************************************************************
+
+ Atari Video Computer System digital joystick emulation
+
+**********************************************************************/
+
+#include "joystick.h"
+
+
+
+//**************************************************************************
+// DEVICE DEFINITIONS
+//**************************************************************************
+
+const device_type VCS_JOYSTICK = &device_creator<vcs_joystick_device>;
+
+
+static INPUT_PORTS_START( vcs_joystick )
+ PORT_START("JOY")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_8WAY
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_8WAY
+ PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_8WAY
+ PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_8WAY
+ PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON1 )
+ PORT_BIT( 0xd0, IP_ACTIVE_LOW, IPT_UNUSED )
+INPUT_PORTS_END
+
+
+//-------------------------------------------------
+// input_ports - device-specific input ports
+//-------------------------------------------------
+
+ioport_constructor vcs_joystick_device::device_input_ports() const
+{
+ return INPUT_PORTS_NAME( vcs_joystick );
+}
+
+
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+// vcs_joystick_device - constructor
+//-------------------------------------------------
+
+vcs_joystick_device::vcs_joystick_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
+ device_t(mconfig, VCS_JOYSTICK, "Atari / CBM Digital joystick", tag, owner, clock, "vcs_joystick", __FILE__),
+ device_vcs_control_port_interface(mconfig, *this),
+ m_joy(*this, "JOY")
+{
+}
+
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void vcs_joystick_device::device_start()
+{
+}
+
+
+//-------------------------------------------------
+// vcs_joy_r - joystick read
+//-------------------------------------------------
+
+UINT8 vcs_joystick_device::vcs_joy_r()
+{
+ return m_joy->read();
+}