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/*********************************************************************
ym2148.h
Yamaha YM2148 Midi and keyboard interface
*********************************************************************/
#ifndef __YM2148_H__
#define __YM2148_H__
//**************************************************************************
// INTERFACE CONFIGURATION MACROS
//**************************************************************************
#define MCFG_YM2148_TXD_HANDLER(_devcb) \
devcb = &ym2148_device::set_txd_handler(*device, DEVCB_##_devcb);
#define MCFG_YM2148_PORT_WRITE_HANDLER(_devcb) \
devcb = &ym2148_device::set_port_write_handler(*device, DEVCB_##_devcb);
#define MCFG_YM2148_PORT_READ_HANDLER(_devcb) \
devcb = &ym2148_device::set_port_read_handler(*device, DEVCB_##_devcb);
#define MCFG_YM2148_IRQ_HANDLER(_devcb) \
devcb = &ym2148_device::set_irq_handler(*device, DEVCB_##_devcb);
class ym2148_device : public device_t,
public device_serial_interface
{
public:
// construction/destruction
ym2148_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
// static configuration helpers
template<class _Object> static devcb_base &set_txd_handler(device_t &device, _Object object) { return downcast<ym2148_device &>(device).m_txd_handler.set_callback(object); }
template<class _Object> static devcb_base &set_port_write_handler(device_t &device, _Object object) { return downcast<ym2148_device &>(device).m_port_write_handler.set_callback(object); }
template<class _Object> static devcb_base &set_port_read_handler(device_t &device, _Object object) { return downcast<ym2148_device &>(device).m_port_read_handler.set_callback(object); }
template<class _Object> static devcb_base &set_irq_handler(device_t &device, _Object object) { return downcast<ym2148_device &>(device).m_irq_handler.set_callback(object); }
DECLARE_READ8_MEMBER(read);
DECLARE_WRITE8_MEMBER(write);
DECLARE_WRITE_LINE_MEMBER(write_rxd);
UINT8 get_irq_vector();
protected:
virtual void device_start();
virtual void device_reset();
virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr);
private:
devcb_write_line m_txd_handler;
devcb_write_line m_irq_handler;
devcb_write8 m_port_write_handler; // write ST0-ST7
devcb_read8 m_port_read_handler; // read SD0-SD7
int m_irq_state;
UINT8 m_irq_vector;
UINT8 m_external_irq_vector;
// Does this chip have 1 or 2 data registers?
UINT8 m_data_out;
UINT8 m_data_in;
UINT8 m_control;
UINT8 m_status;
emu_timer *m_timer;
int m_rxd;
bool m_tx_busy;
void receive_clock();
void transmit_clock();
void update_irq();
enum
{
STATUS_TRANSMIT_READY = 0x01,
STATUS_RECEIVE_BUFFER_FULL = 0x2,
STATUS_OVERRUN_ERROR = 0x20,
CONTROL_TRANSMIT_ENABLE = 0x01,
CONTROL_TRANSMIT_IRQ_ENABLE = 0x02,
CONTROL_RECEIVE_ENABLE = 0x04,
CONTROL_RECEIVE_IRQ_ENABLE = 0x08
};
};
extern const device_type YM2148;
#endif
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