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/**********************************************************************
DEC RX01 floppy drive controller
**********************************************************************/
#pragma once
#ifndef __RX01__
#define __RX01__
//**************************************************************************
// INTERFACE CONFIGURATION MACROS
//**************************************************************************
#define MCFG_RX01_ADD(_tag) \
MCFG_DEVICE_ADD(_tag, RX01, 0)
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> rx01_device
class rx01_device : public device_t
{
public:
// construction/destruction
rx01_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
DECLARE_READ16_MEMBER( read );
DECLARE_WRITE16_MEMBER( write );
// optional information overrides
virtual machine_config_constructor device_mconfig_additions() const;
protected:
// device-level overrides
virtual void device_start();
virtual void device_reset();
void command_write(UINT16 data);
UINT16 status_read();
void data_write(UINT16 data);
UINT16 data_read();
void service_command();
static TIMER_CALLBACK( command_execution_callback ) { reinterpret_cast<rx01_device *>(ptr)->service_command(); }
void position_head();
void read_sector();
void write_sector(int ddam);
private:
enum rx01_state {
RX01_FILL,
RX01_EMPTY,
RX01_SET_SECTOR,
RX01_SET_TRACK,
RX01_TRANSFER,
RX01_COMPLETE,
RX01_INIT
};
device_t *m_image[2];
UINT8 m_buffer[128];
int m_buf_pos;
UINT16 m_rxcs; // Command and Status Register
UINT16 m_rxdb; // Data Buffer Register
UINT16 m_rxta; // RX Track Address
UINT16 m_rxsa; // RX Sector Address
UINT16 m_rxes; // RX Error and Status
int m_unit;
int m_interrupt;
rx01_state m_state;
};
// device type definition
extern const device_type RX01;
#endif
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