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// license:LGPL-2.1+
// copyright-holders:Michael Zapf
/****************************************************************************
v9938 Color bus
The color bus runs from the v9938 video processor to some external device
like a mouse or a lightpen.
The Geneve mouse offers three buttons, of which the leftmost one is not
connected to the v9938; the color bus implementation on the Geneve board
offers a separate line going to the 9901.
Michael Zapf
March 2017
*****************************************************************************/
#include "emu.h"
#include "colorbus.h"
#include "busmouse.h"
#include "bus/ti99/ti99defs.h"
DEFINE_DEVICE_TYPE_NS(TI99_COLORBUS, bus::ti99::colorbus, ti99_colorbus_device, "ti99_colorbus", "v9938 Color bus")
namespace bus { namespace ti99 { namespace colorbus {
ti99_colorbus_device::ti99_colorbus_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
: device_t(mconfig, TI99_COLORBUS, tag, owner, clock),
device_slot_interface(mconfig, *this),
m_connected(nullptr),
m_v9938(*owner, TI_VDP_TAG),
m_left_button_pressed(false)
{
}
void ti99_colorbus_device::poll()
{
int delta_x, delta_y, buttons;
// only middle and right button go to V9938
m_connected->poll(delta_x, delta_y, buttons);
m_v9938->update_mouse_state(delta_x, delta_y, buttons & 0x03);
m_left_button_pressed = (buttons & 0x04)!=0;
}
line_state ti99_colorbus_device::left_button()
{
return m_left_button_pressed? ASSERT_LINE : CLEAR_LINE;
}
void ti99_colorbus_device::device_config_complete()
{
m_connected = dynamic_cast<device_ti99_colorbus_interface*>(subdevices().first());
}
/*****************************************************************************/
void device_ti99_colorbus_interface::interface_config_complete()
{
m_colorbus = dynamic_cast<ti99_colorbus_device*>(device().owner());
}
} } } // end namespace bus::ti99::colorbus
void ti99_colorbus_port(device_slot_interface &device)
{
device.option_add("busmouse", TI99_BUSMOUSE);
}
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