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+// license:BSD-3-Clause
+// copyright-holders:Robbbert
+/*********************************************************************
+
+ micropolis.h
+
+ Implementations of the Micropolis
+ floppy disk controller for the Sorcerer
+
+*********************************************************************/
+
+#ifndef __MICROPOLIS_H__
+#define __MICROPOLIS_H__
+
+#include "imagedev/flopdrv.h"
+
+
+/***************************************************************************
+ TYPE DEFINITIONS
+***************************************************************************/
+
+#define MCFG_MICROPOLIS_DRIVE_TAGS(_tag1, _tag2, _tag3, _tag4) \
+ micropolis_device::set_drive_tags(*device, _tag1, _tag2, _tag3, _tag4);
+
+#define MCFG_MICROPOLIS_DEFAULT_DRIVE4_TAGS \
+ MCFG_MICROPOLIS_DRIVE_TAGS(FLOPPY_0, FLOPPY_1, FLOPPY_2, FLOPPY_3)
+
+#define MCFG_MICROPOLIS_DDEN_CALLBACK(_read) \
+ devcb = &micropolis_device::set_dden_rd_callback(*device, DEVCB_##_read);
+
+#define MCFG_MICROPOLIS_INTRQ_CALLBACK(_write) \
+ devcb = &micropolis_device::set_intrq_wr_callback(*device, DEVCB_##_write);
+
+#define MCFG_MICROPOLIS_DRQ_CALLBACK(_write) \
+ devcb = &micropolis_device::set_drq_wr_callback(*device, DEVCB_##_write);
+
+/***************************************************************************
+ MACROS
+***************************************************************************/
+
+class micropolis_device : public device_t
+{
+public:
+ micropolis_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+ ~micropolis_device() {}
+
+ template<class _Object> static devcb_base &set_dden_rd_callback(device_t &device, _Object object) { return downcast<micropolis_device &>(device).m_read_dden.set_callback(object); }
+ template<class _Object> static devcb_base &set_intrq_wr_callback(device_t &device, _Object object) { return downcast<micropolis_device &>(device).m_write_intrq.set_callback(object); }
+ template<class _Object> static devcb_base &set_drq_wr_callback(device_t &device, _Object object) { return downcast<micropolis_device &>(device).m_write_drq.set_callback(object); }
+
+ static void set_drive_tags(device_t &device, const char *tag1, const char *tag2, const char *tag3, const char *tag4)
+ {
+ micropolis_device &dev = downcast<micropolis_device &>(device);
+ dev.m_floppy_drive_tags[0] = tag1;
+ dev.m_floppy_drive_tags[1] = tag2;
+ dev.m_floppy_drive_tags[2] = tag3;
+ dev.m_floppy_drive_tags[3] = tag4;
+ }
+
+ void set_drive(UINT8 drive); // set current drive (0-3)
+
+ DECLARE_READ8_MEMBER( status_r );
+ DECLARE_READ8_MEMBER( data_r );
+
+ DECLARE_WRITE8_MEMBER( command_w );
+ DECLARE_WRITE8_MEMBER( data_w );
+
+ DECLARE_READ8_MEMBER( read );
+ DECLARE_WRITE8_MEMBER( write );
+
+protected:
+ // device-level overrides
+ virtual void device_start();
+ virtual void device_reset();
+
+private:
+ // internal state
+
+ devcb_read_line m_read_dden;
+ devcb_write_line m_write_intrq;
+ devcb_write_line m_write_drq;
+
+ const char *m_floppy_drive_tags[4];
+
+ /* register */
+ UINT8 m_data;
+ UINT8 m_drive_num;
+ UINT8 m_track;
+ UINT8 m_sector;
+ UINT8 m_command;
+ UINT8 m_status;
+
+ UINT8 m_write_cmd; /* last write command issued */
+
+ UINT8 m_buffer[6144]; /* I/O buffer (holds up to a whole track) */
+ UINT32 m_data_offset; /* offset into I/O buffer */
+ INT32 m_data_count; /* transfer count from/into I/O buffer */
+
+ UINT32 m_sector_length; /* sector length (byte) */
+
+ /* this is the drive currently selected */
+ legacy_floppy_image_device *m_drive;
+
+ void read_sector();
+ void write_sector();
+};
+
+extern const device_type MICROPOLIS;
+
+
+#endif /* __MICROPOLIS_H__ */