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Diffstat (limited to 'src/devices/bus/nes_ctrl/turbofile.h')
-rw-r--r--src/devices/bus/nes_ctrl/turbofile.h59
1 files changed, 59 insertions, 0 deletions
diff --git a/src/devices/bus/nes_ctrl/turbofile.h b/src/devices/bus/nes_ctrl/turbofile.h
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+++ b/src/devices/bus/nes_ctrl/turbofile.h
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+// license:BSD-3-Clause
+// copyright-holders:kmg
+/**********************************************************************
+
+ Nintendo Family Computer ASCII Turbofile SRAM external storage device
+
+**********************************************************************/
+
+#ifndef MAME_BUS_NES_CTRL_TURBOFILE_H
+#define MAME_BUS_NES_CTRL_TURBOFILE_H
+
+#pragma once
+
+#include "ctrl.h"
+#include "machine/nvram.h"
+
+
+//**************************************************************************
+// TYPE DEFINITIONS
+//**************************************************************************
+
+// ======================> nes_turbofile_device
+
+class nes_turbofile_device : public device_t,
+ public device_nes_control_port_interface
+{
+public:
+ // construction/destruction
+ nes_turbofile_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock);
+
+ virtual u8 read_exp(offs_t offset) override;
+ virtual void write(u8 data) override;
+
+ DECLARE_INPUT_CHANGED_MEMBER(lock_changed);
+
+protected:
+ // device-level overrides
+ virtual void device_start() override;
+ virtual void device_reset() override;
+
+ virtual ioport_constructor device_input_ports() const override;
+ virtual void device_add_mconfig(machine_config &config) override;
+
+private:
+ required_device<nvram_device> m_nvram;
+ required_ioport m_lock;
+
+ std::unique_ptr<u8[]> m_ram;
+ u16 m_addr;
+ u8 m_bit;
+ u8 m_latch;
+ u8 m_locked;
+};
+
+
+// device type definition
+DECLARE_DEVICE_TYPE(NES_TURBOFILE, nes_turbofile_device)
+
+#endif // MAME_BUS_NES_CTRL_TURBOFILE_H