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-rw-r--r--src/mess/machine/rx01.h81
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diff --git a/src/mess/machine/rx01.h b/src/mess/machine/rx01.h
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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