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// license:BSD-3-Clause
// copyright-holders:Fabio Priuli
#ifndef MAME_BUS_NES_MMC5_H
#define MAME_BUS_NES_MMC5_H
#pragma once
#include "nxrom.h"
#include "sound/nes_apu.h" // temp hack to pass the additional sound regs to APU...
#include "video/ppu2c0x.h" // this has to be included so that IRQ functions can access ppu2c0x_device::BOTTOM_VISIBLE_SCANLINE
// ======================> nes_exrom_device
class nes_exrom_device : public nes_nrom_device
{
public:
// construction/destruction
nes_exrom_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
~nes_exrom_device();
virtual uint8_t read_l(offs_t offset) override;
virtual uint8_t read_m(offs_t offset) override;
virtual uint8_t read_h(offs_t offset) override;
virtual void write_l(offs_t offset, uint8_t data) override;
virtual void write_m(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 uint8_t nt_r(offs_t offset) override;
virtual void nt_w(offs_t offset, uint8_t data) override;
virtual void hblank_irq(int scanline, int vblank, int blanked) override;
virtual void pcb_reset() override;
protected:
// device-level overrides
virtual void device_start() override;
void set_mirror(int page, int src);
void update_prg();
inline uint8_t base_chr_r(int bank, uint32_t offset);
inline uint8_t split_chr_r(uint32_t offset);
inline uint8_t bg_ex1_chr_r(uint32_t offset);
inline bool in_split();
uint16_t m_irq_count;
uint8_t m_irq_status;
int m_irq_enable;
int m_mult1, m_mult2;
int m_mmc5_scanline;
int m_vrom_page_a;
int m_vrom_page_b;
uint16_t m_vrom_bank[12]; // MMC5 has 10bit wide VROM regs!
int m_floodtile;
int m_floodattr;
int m_prg_mode; // $5100
int m_chr_mode; // $5101
int m_wram_protect_1; // $5102
int m_wram_protect_2; // $5103
int m_exram_control; // $5104
int m_wram_base; // $5113
uint8_t m_last_chr;
uint8_t m_ex1_chr;
uint8_t m_split_chr;
uint8_t m_prg_regs[4];
uint8_t m_prg_ram_mapped[4];
uint8_t m_ex1_bank;
uint8_t m_high_chr; // $5130
uint8_t m_split_scr; // $5200
uint8_t m_split_rev; // $5200
uint8_t m_split_ctrl; // $5200
uint8_t m_split_yst; // $5201
uint8_t m_split_bank; // $5202
int m_vcount;
// MMC-5 contains 1K of internal ram
uint8_t m_exram[0x400];
uint8_t m_ram_hi_banks[4];
// int m_nes_vram_sprite[8];
required_device<ppu2c0x_device> m_ppu;
required_device<nesapu_device> m_sound;
};
// device type definition
DECLARE_DEVICE_TYPE(NES_EXROM, nes_exrom_device)
#endif // MAME_BUS_NES_MMC5_H
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