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author R. Belmont <rb6502@users.noreply.github.com>2020-05-28 07:47:50 -0400
committer GitHub <noreply@github.com>2020-05-28 07:47:50 -0400
commit3ed842c01cb666533da31a0bc0907ef8bd4a0f63 (patch)
treef8762514af0b4848052cf198a8d2991c5ccd7237 /3rdparty/README.md
parentd4956fe2a68be5116f0bed7a6777a4cb2f77a304 (diff)
parent963e16d63cefbb277d0a776fe94aa4184d05ae8e (diff)
Merge pull request #6750 from shattered/_100c143238a
Add MM58174 real time clock and use it (nw)
Diffstat (limited to '3rdparty/README.md')
0 files changed, 0 insertions, 0 deletions
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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, u32 clock);

	virtual u8 read_l(offs_t offset) override;
	virtual u8 read_m(offs_t offset) override;
	virtual u8 read_h(offs_t offset) override;
	virtual void write_l(offs_t offset, u8 data) override;
	virtual void write_m(offs_t offset, u8 data) override;
	virtual void write_h(offs_t offset, u8 data) override;

	virtual u8 chr_r(offs_t offset) override;
	virtual void chr_w(offs_t offset, u8 data) override;
	virtual u8 nt_r(offs_t offset) override;
	virtual void nt_w(offs_t offset, u8 data) override;

	void hblank_irq(int scanline, bool vblank, bool blanked) override { if (m_gg_bypass && m_ggslot->m_cart) m_ggslot->m_cart->hblank_irq(scanline, vblank, blanked); }
	void scanline_irq(int scanline, bool vblank, bool 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, u8 *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:
	// passthrough cart slot
	required_device<nes_cart_slot_device> m_ggslot;

	bool m_gg_bypass;
	// GG codes
	u16  m_gg_addr[3];
	u8   m_gg_repl[3];
	u8   m_gg_comp[3];
	bool m_gg_enable[3];
	bool m_gg_is_comp[3];
};


// device type definition
DECLARE_DEVICE_TYPE(NES_GGENIE, nes_ggenie_device)

#endif // MAME_BUS_NES_GGENIE_H