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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 MAME_BUS_TI99_PEB_TI_FDC_H
#define MAME_BUS_TI99_PEB_TI_FDC_H
#pragma once
#include "peribox.h"
#include "machine/74259.h"
#include "machine/wd_fdc.h"
#include "imagedev/floppy.h"
namespace bus { namespace ti99 { namespace peb {
class ti_fdc_device : public device_t, public device_ti99_peribox_card_interface
{
public:
ti_fdc_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
DECLARE_READ8Z_MEMBER(readz) override;
DECLARE_WRITE8_MEMBER(write) override;
DECLARE_SETADDRESS_DBIN_MEMBER(setaddress_dbin) override;
DECLARE_READ8Z_MEMBER(crureadz) override;
DECLARE_WRITE8_MEMBER(cruwrite) override;
// bool dvena_r();
protected:
void device_start() override;
void device_reset() override;
void device_config_complete() override;
const tiny_rom_entry *device_rom_region() const override;
virtual void device_add_mconfig(machine_config &config) override;
void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;
private:
DECLARE_FLOPPY_FORMATS( floppy_formats );
DECLARE_WRITE_LINE_MEMBER(fdc_irq_w);
DECLARE_WRITE_LINE_MEMBER(fdc_drq_w);
DECLARE_WRITE_LINE_MEMBER(dskpgena_w);
DECLARE_WRITE_LINE_MEMBER(kaclk_w);
DECLARE_WRITE_LINE_MEMBER(waiten_w);
DECLARE_WRITE_LINE_MEMBER(hlt_w);
DECLARE_WRITE_LINE_MEMBER(dsel_w);
DECLARE_WRITE_LINE_MEMBER(sidsel_w);
// For debugger access
void debug_read(offs_t offset, uint8_t* value);
// 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.
int m_DRQ, m_IRQ;
// Latched CRU outputs
required_device<ls259_device> m_crulatch;
// Signal DVENA. When true, makes some drive turning.
int 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.
int 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_device> m_fd1771;
// DSR ROM
uint8_t* m_dsrrom;
// Link to the attached floppy drives
floppy_image_device* m_floppy[3];
// Currently selected floppy drive
int m_current;
};
} } } // end namespace bus::ti99::peb
DECLARE_DEVICE_TYPE_NS(TI99_FDC, bus::ti99::peb, ti_fdc_device)
#endif // MAME_BUS_TI99_PEB_TI_FDC_H
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