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