// license:BSD-3-Clause // copyright-holders:Fabio Priuli #ifndef MAME_BUS_NES_MMC1_H #define MAME_BUS_NES_MMC1_H #pragma once #include "nxrom.h" // ======================> nes_sxrom_device class nes_sxrom_device : public nes_nrom_device { public: // construction/destruction nes_sxrom_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock); virtual uint8_t read_m(offs_t offset) override; virtual void write_m(offs_t offset, uint8_t data) override; virtual void write_h(offs_t offset, uint8_t data) override; virtual void pcb_reset() override; protected: nes_sxrom_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; TIMER_CALLBACK_MEMBER(resync_callback); virtual void update_regs(int reg); // this is needed to simplify NES-EVENT pcb implementation, which handle differently some regs! void set_prg(int prg_base, int prg_mask); void set_chr(int chr_base, int chr_mask); virtual void set_prg(); // virtual void set_prg() { set_prg(0x00, 0x0f); } virtual void set_chr() { set_chr(0x00, 0x1f); } uint8_t m_reg[4]; int m_reg_write_enable; int m_latch; int m_count; }; // ======================> nes_sorom_device class nes_sorom_device : public nes_sxrom_device { public: // construction/destruction nes_sorom_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock); virtual uint8_t read_m(offs_t offset) override; virtual void write_m(offs_t offset, uint8_t data) override; }; // ======================> nes_szrom_device class nes_szrom_device : public nes_sxrom_device { public: // construction/destruction nes_szrom_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock); virtual u8 read_m(offs_t offset) override; virtual void write_m(offs_t offset, u8 data) override; }; // device type definition DECLARE_DEVICE_TYPE(NES_SXROM, nes_sxrom_device) DECLARE_DEVICE_TYPE(NES_SOROM, nes_sorom_device) DECLARE_DEVICE_TYPE(NES_SZROM, nes_szrom_device) #endif // MAME_BUS_NES_MMC1_H