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// license:BSD-3-Clause
// copyright-holders:Sergey Svishchev
/***************************************************************************
Loopback cart for ROM test routines
***************************************************************************/
#include "emu.h"
#include "loopback.h"
namespace {
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> bk_loopback_device
class bk_loopback_device : public device_t, public device_bk_parallel_interface
{
public:
// construction/destruction
bk_loopback_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
protected:
virtual void device_start() override ATTR_COLD;
virtual void device_reset() override ATTR_COLD { m_data = 0; };
virtual uint16_t io_r() override;
virtual void io_w(uint16_t data, bool word) override;
private:
uint16_t m_data;
};
//**************************************************************************
// LIVE DEVICE
//**************************************************************************
//-------------------------------------------------
// bk_loopback_device - constructor
//-------------------------------------------------
bk_loopback_device::bk_loopback_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
: device_t(mconfig, BK_LOOPBACK, tag, owner, clock)
, device_bk_parallel_interface(mconfig, *this)
{
}
//**************************************************************************
// IMPLEMENTATION
//**************************************************************************
void bk_loopback_device::device_start()
{
save_item(NAME(m_data));
}
uint16_t bk_loopback_device::io_r()
{
return m_data;
}
void bk_loopback_device::io_w(uint16_t data, bool word)
{
m_data = data;
}
} // anonymous namespace
//**************************************************************************
// DEVICE DEFINITIONS
//**************************************************************************
DEFINE_DEVICE_TYPE_PRIVATE(BK_LOOPBACK, device_bk_parallel_interface, bk_loopback_device, "bk_loopback", "BK Loopback")
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