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// license:BSD-3-Clause
// copyright-holders:Mariusz Wojcieszek
#include "emu.h"
#include "machine/pcecommn.h"
#include "cpu/h6280/h6280.h"
#define TG_16_JOY_SIG 0x00
#define PCE_JOY_SIG 0x40
#define NO_CD_SIG 0x80
#define CD_SIG 0x00
/* these might be used to indicate something, but they always seem to return 1 */
#define CONST_SIG 0x30
/* joystick related data*/
#define JOY_CLOCK 0x01
#define JOY_RESET 0x02
/* todo: how many input ports does the PCE have? */
void pce_common_state::pce_joystick_w(uint8_t data)
{
/* bump counter on a low-to-high transition of bit 1 */
if((!m_joystick_data_select) && (data & JOY_CLOCK))
{
m_joystick_port_select = (m_joystick_port_select + 1) & 0x07;
}
/* do we want buttons or direction? */
m_joystick_data_select = data & JOY_CLOCK;
/* clear counter if bit 2 is set */
if(data & JOY_RESET)
{
m_joystick_port_select = 0;
}
}
uint8_t pce_common_state::joy_read()
{
return ioport("JOY")->read();
}
uint8_t pce_common_state::pce_joystick_r()
{
uint8_t ret;
int data = joy_read();
if (m_joystick_data_select) data >>= 4;
ret = (data & 0x0F) | m_io_port_options;
#ifdef UNIFIED_PCE
ret &= ~0x40;
#endif
return (ret);
}
void pce_common_state::init_pce_common()
{
m_io_port_options = PCE_JOY_SIG | CONST_SIG;
}
uint32_t pce_common_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
m_huc6260->video_update( bitmap, cliprect );
return 0;
}
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