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Diffstat (limited to 'src/devices/bus/bbc/rom/nvram.h')
-rw-r--r-- | src/devices/bus/bbc/rom/nvram.h | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/src/devices/bus/bbc/rom/nvram.h b/src/devices/bus/bbc/rom/nvram.h new file mode 100644 index 00000000000..d10025c6acd --- /dev/null +++ b/src/devices/bus/bbc/rom/nvram.h @@ -0,0 +1,42 @@ +// license:BSD-3-Clause +// copyright-holders:Nigel Barnes +/*************************************************************************** + + BBC Micro Sideways RAM (Battery Backup) emulation + +***************************************************************************/ + +#ifndef MAME_BUS_BBC_ROM_NVRAM_H +#define MAME_BUS_BBC_ROM_NVRAM_H + +#pragma once + +#include "slot.h" + +//************************************************************************** +// TYPE DEFINITIONS +//************************************************************************** + +// ======================> bbc_nvram_device + +class bbc_nvram_device : public device_t, + public device_bbc_rom_interface +{ +public: + // construction/destruction + bbc_nvram_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock); + +protected: + // device-level overrides + virtual void device_start() override; + + // device_bbc_rom_interface overrides + virtual uint8_t read(offs_t offset) override; + virtual void write(offs_t offset, uint8_t data) override; +}; + + +// device type definition +DECLARE_DEVICE_TYPE(BBC_NVRAM, bbc_nvram_device) + +#endif // MAME_BUS_BBC_ROM_NVRAM_H |