// license:BSD-3-Clause // copyright-holders:Fabio Priuli #ifndef MAME_BUS_NES_LEGACY_H #define MAME_BUS_NES_LEGACY_H #pragma once #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); virtual void write_h(offs_t offset, uint8_t data) override; virtual void pcb_reset() override; protected: // device-level overrides virtual void device_start() override; }; // ======================> nes_ffe4_device class nes_ffe4_device : public nes_nrom_device { public: // construction/destruction nes_ffe4_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock); virtual void write_l(offs_t offset, uint8_t data) override; virtual void write_h(offs_t offset, uint8_t data) override; virtual uint8_t chr_r(offs_t offset) override; virtual void chr_w(offs_t offset, uint8_t data) override; virtual void pcb_reset() override; protected: static constexpr device_timer_id TIMER_IRQ = 0; nes_ffe4_device(const machine_config &mconfig, device_type type, 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; uint16_t m_irq_count; int m_irq_enable; 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 void write_l(offs_t offset, uint8_t data) override; virtual void write_h(offs_t offset, uint8_t data) override {} virtual void pcb_reset() override; }; // device type definition DECLARE_DEVICE_TYPE(NES_FFE3, nes_ffe3_device) DECLARE_DEVICE_TYPE(NES_FFE4, nes_ffe4_device) DECLARE_DEVICE_TYPE(NES_FFE8, nes_ffe8_device) #endif // MAME_BUS_NES_LEGACY_H