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-rw-r--r--src/devices/bus/nes/ggenie.h58
1 files changed, 58 insertions, 0 deletions
diff --git a/src/devices/bus/nes/ggenie.h b/src/devices/bus/nes/ggenie.h
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+++ b/src/devices/bus/nes/ggenie.h
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+// license:BSD-3-Clause
+// copyright-holders:Fabio Priuli
+#ifndef __NES_GGENIE_H
+#define __NES_GGENIE_H
+
+#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 clock);
+
+ // device-level overrides
+ virtual void device_start();
+ virtual DECLARE_READ8_MEMBER(read_l);
+ virtual DECLARE_READ8_MEMBER(read_m);
+ virtual DECLARE_READ8_MEMBER(read_h);
+ virtual DECLARE_WRITE8_MEMBER(write_l);
+ virtual DECLARE_WRITE8_MEMBER(write_m);
+ virtual DECLARE_WRITE8_MEMBER(write_h);
+
+ virtual DECLARE_READ8_MEMBER(chr_r);
+ virtual DECLARE_WRITE8_MEMBER(chr_w);
+ virtual DECLARE_READ8_MEMBER(nt_r);
+ virtual DECLARE_WRITE8_MEMBER(nt_w);
+
+ void hblank_irq(int scanline, int vblank, int blanked) { 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) { if (m_gg_bypass && m_ggslot->m_cart) m_ggslot->m_cart->scanline_irq(scanline, vblank, blanked); }
+ void ppu_latch(offs_t offset) { if (m_gg_bypass && m_ggslot->m_cart) m_ggslot->m_cart->ppu_latch(offset); }
+
+ virtual machine_config_constructor device_mconfig_additions() const;
+
+ virtual void pcb_reset();
+ virtual void pcb_start(running_machine &machine, UINT8 *ciram_ptr, bool cart_mounted);
+
+private:
+ // emulate the Game Genie!
+ required_device<nes_cart_slot_device> m_ggslot;
+
+ int m_gg_bypass;
+ // GG codes
+ UINT16 m_gg_addr[3];
+ UINT8 m_gg_repl[3];
+ UINT8 m_gg_comp[3];
+ int m_gg_disable[3];
+ int m_gg_is_comp[3];
+};
+
+
+
+// device type definition
+extern const device_type NES_GGENIE;
+
+#endif