diff options
Diffstat (limited to 'src/devices/bus/nes_ctrl/turbofile.h')
-rw-r--r-- | src/devices/bus/nes_ctrl/turbofile.h | 59 |
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 new file mode 100644 index 00000000000..b95a28c6024 --- /dev/null +++ b/src/devices/bus/nes_ctrl/turbofile.h @@ -0,0 +1,59 @@ +// 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 ATTR_COLD; + virtual void device_reset() override ATTR_COLD; + + virtual ioport_constructor device_input_ports() const override ATTR_COLD; + virtual void device_add_mconfig(machine_config &config) override ATTR_COLD; + +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 |