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// license:BSD-3-Clause
// copyright-holders:Fabio Priuli
#ifndef MAME_BUS_NES_SOMARI_H
#define MAME_BUS_NES_SOMARI_H
#pragma once
#include "mmc3.h"
// ======================> nes_somari_device
class nes_somari_device : public nes_txrom_device
{
public:
// construction/destruction
nes_somari_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 { write_m(offset + 0x100, data); }
virtual void write_m(offs_t offset, uint8_t data) override;
void mmc1_w(offs_t offset, uint8_t data);
void mmc3_w(offs_t offset, uint8_t data);
void vrc2_w(offs_t offset, uint8_t data);
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;
private:
void update_prg();
void update_chr();
void update_mirror();
void bank_update_switchmode();
uint8_t m_board_mode;
// MMC3 - inherited from txrom
uint8_t m_mmc3_mirror_reg;
// MMC1
uint8_t m_count;
uint8_t m_mmc1_latch;
uint8_t m_mmc1_reg[4];
// VRC2
uint8_t m_vrc_prg_bank[2];
uint8_t m_vrc_vrom_bank[8];
uint8_t m_vrc_mirror_reg;
};
// device type definition
DECLARE_DEVICE_TYPE(NES_SOMARI, nes_somari_device)
#endif // MAME_BUS_NES_SOMARI_H
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