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+// license:LGPL-2.1+
+// copyright-holders:Michael Zapf
+/****************************************************************************
+
+ TI-99 Standard Floppy Disk Controller Card
+ See ti_fdc.c for documentation
+
+ Michael Zapf
+
+ September 2010
+ January 2012: rewritten as class (MZ)
+
+****************************************************************************/
+#ifndef __TIFDC__
+#define __TIFDC__
+
+#include "machine/wd_fdc.h"
+#include "imagedev/floppy.h"
+
+extern const device_type TI99_FDC;
+
+class ti_fdc_device : public ti_expansion_card_device
+{
+public:
+ ti_fdc_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+ DECLARE_READ8Z_MEMBER(readz);
+ DECLARE_WRITE8_MEMBER(write);
+ DECLARE_SETADDRESS_DBIN_MEMBER(setaddress_dbin);
+
+ DECLARE_WRITE_LINE_MEMBER( intrq_w );
+ DECLARE_WRITE_LINE_MEMBER( drq_w );
+
+ DECLARE_READ8Z_MEMBER(crureadz);
+ DECLARE_WRITE8_MEMBER(cruwrite);
+
+ DECLARE_FLOPPY_FORMATS( floppy_formats );
+
+ DECLARE_WRITE_LINE_MEMBER( fdc_irq_w );
+ DECLARE_WRITE_LINE_MEMBER( fdc_drq_w );
+ // bool dvena_r();
+
+protected:
+ void device_start();
+ void device_reset();
+ void device_config_complete();
+
+ const rom_entry *device_rom_region() const;
+ machine_config_constructor device_mconfig_additions() const;
+
+ void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr);
+
+private:
+ // Wait state logic
+ void operate_ready_line();
+
+ // Set the current floppy
+ void set_drive();
+
+ // Operate the floppy motors
+ void set_floppy_motors_running(bool run);
+
+ // Recent address
+ int m_address;
+
+ // Holds the status of the DRQ and IRQ lines.
+ line_state m_DRQ, m_IRQ;
+
+ // Needed for triggering the motor monoflop
+ UINT8 m_lastval;
+
+ // Signal DVENA. When TRUE, makes some drive turning.
+ line_state m_DVENA;
+
+ // Set when address is in card area
+ bool m_inDsrArea;
+
+ // When TRUE the CPU is halted while DRQ/IRQ are true.
+ bool m_WAITena;
+
+ // WD chip selected
+ bool m_WDsel;
+
+ // Indicates which drive has been selected. Values are 0, 1, 2, and 4.
+ // 000 = no drive
+ // 001 = drive 1
+ // 010 = drive 2
+ // 100 = drive 3
+ int m_DSEL;
+
+ // Signal SIDSEL. 0 or 1, indicates the selected head.
+ line_state m_SIDSEL;
+
+ // count 4.23s from rising edge of motor_on
+ emu_timer* m_motor_on_timer;
+
+ // Link to the FDC1771 controller on the board.
+ required_device<fd1771_t> m_fd1771;
+
+ // DSR ROM
+ UINT8* m_dsrrom;
+
+ // Link to the attached floppy drives
+ floppy_image_device* m_floppy[3];
+
+ // Currently selected floppy drive
+ floppy_image_device* m_current_floppy;
+
+ // Debugging
+ bool m_debug_dataout;
+};
+#endif