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// license:BSD-3-Clause
// copyright-holders:Fabio Priuli
#ifndef MAME_BUS_NES_GGENIE_H
#define MAME_BUS_NES_GGENIE_H
#pragma once
#include "nxrom.h"
// ======================> nes_ggenie_device
class nes_ggenie_device : public nes_nrom_device
{
public:
// construction/destruction
nes_ggenie_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
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 void chr_w(offs_t offset, uint8_t data) override;
virtual uint8_t nt_r(offs_t offset) override;
virtual void nt_w(offs_t offset, uint8_t data) override;
void hblank_irq(int scanline, int vblank, int blanked) override { if (m_gg_bypass && m_ggslot->m_cart) m_ggslot->m_cart->hblank_irq(scanline, vblank, blanked); }
void scanline_irq(int scanline, int vblank, int blanked) override { if (m_gg_bypass && m_ggslot->m_cart) m_ggslot->m_cart->scanline_irq(scanline, vblank, blanked); }
void ppu_latch(offs_t offset) override { if (m_gg_bypass && m_ggslot->m_cart) m_ggslot->m_cart->ppu_latch(offset); }
virtual void pcb_reset() override;
virtual void pcb_start(running_machine &machine, uint8_t *ciram_ptr, bool cart_mounted) override;
protected:
// device-level overrides
virtual void device_start() override;
virtual void device_add_mconfig(machine_config &config) override;
private:
// emulate the Game Genie!
required_device<nes_cart_slot_device> m_ggslot;
int m_gg_bypass;
// GG codes
uint16_t m_gg_addr[3];
uint8_t m_gg_repl[3];
uint8_t m_gg_comp[3];
int m_gg_disable[3];
int m_gg_is_comp[3];
};
// device type definition
DECLARE_DEVICE_TYPE(NES_GGENIE, nes_ggenie_device)
#endif // MAME_BUS_NES_GGENIE_H
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