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// license:BSD-3-Clause
// copyright-holders:Fabio Priuli
/***************************************************************************
Midway 8080-based black and white hardware
****************************************************************************/
#include "emu.h"
#include "machine/mb14241.h"
//-------------------------------------------------
// mb14241_device - constructor
//-------------------------------------------------
const device_type MB14241 = &device_creator<mb14241_device>;
mb14241_device::mb14241_device(const machine_config &mconfig, std::string tag, device_t *owner, UINT32 clock)
: device_t(mconfig, MB14241, "MB14241 Data Shifter", tag, owner, clock, "mb14241", __FILE__), m_shift_data(0), m_shift_count(0)
{
}
//-------------------------------------------------
// device_config_complete - perform any
// operations now that the configuration is
// complete
//-------------------------------------------------
void mb14241_device::device_config_complete()
{
}
//-------------------------------------------------
// device_start - device-specific startup
//-------------------------------------------------
void mb14241_device::device_start()
{
save_item(NAME(m_shift_data));
save_item(NAME(m_shift_count));
}
//-------------------------------------------------
// device_reset - device-specific reset
//-------------------------------------------------
void mb14241_device::device_reset()
{
m_shift_data = 0;
m_shift_count = 0;
}
/*****************************************************************************
IMPLEMENTATION
*****************************************************************************/
WRITE8_MEMBER( mb14241_device::shift_count_w )
{
m_shift_count = ~data & 0x07;
}
WRITE8_MEMBER( mb14241_device::shift_data_w )
{
m_shift_data = (m_shift_data >> 8) | ((UINT16)data << 7);
}
READ8_MEMBER( mb14241_device::shift_result_r )
{
return m_shift_data >> m_shift_count;
}
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