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// license:BSD-3-Clause
// copyright-holders:Fabio Priuli
#ifndef __NES_LEGACY_H
#define __NES_LEGACY_H
#include "nxrom.h"
// ======================> nes_ffe3_device
class nes_ffe3_device : public nes_nrom_device
{
public:
// construction/destruction
nes_ffe3_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
// device-level overrides
virtual void device_start() override;
virtual DECLARE_WRITE8_MEMBER(write_h) override;
virtual void pcb_reset() override;
};
// ======================> nes_ffe4_device
class nes_ffe4_device : public nes_nrom_device
{
public:
// construction/destruction
nes_ffe4_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, uint32_t clock, const char *shortname, const char *source);
nes_ffe4_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
// device-level overrides
virtual void device_start() override;
virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;
virtual DECLARE_WRITE8_MEMBER(write_l) override;
virtual DECLARE_WRITE8_MEMBER(write_h) override;
virtual DECLARE_READ8_MEMBER(chr_r) override;
virtual DECLARE_WRITE8_MEMBER(chr_w) override;
virtual void pcb_reset() override;
protected:
uint16_t m_irq_count;
int m_irq_enable;
static const device_timer_id TIMER_IRQ = 0;
emu_timer *irq_timer;
uint8_t m_latch;
int m_exram_enabled;
int m_exram_bank;
uint8_t m_exram[0x8000];
};
// ======================> nes_ffe8_device
class nes_ffe8_device : public nes_ffe4_device
{
public:
// construction/destruction
nes_ffe8_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
// device-level overrides
virtual DECLARE_WRITE8_MEMBER(write_l) override;
virtual DECLARE_WRITE8_MEMBER(write_h) override {}
virtual void pcb_reset() override;
};
// device type definition
extern const device_type NES_FFE3;
extern const device_type NES_FFE4;
extern const device_type NES_FFE8;
#endif
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