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// license:BSD-3-Clause
// copyright-holders:Curt Coder
/**********************************************************************
Mega-Cart cartridge emulation
**********************************************************************/
#ifndef MAME_BUS_VIC20_MEGACART_H
#define MAME_BUS_VIC20_MEGACART_H
#pragma once
#include "exp.h"
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> vic20_megacart_device
class vic20_megacart_device : public device_t,
public device_vic20_expansion_card_interface,
public device_nvram_interface
{
public:
// construction/destruction
vic20_megacart_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock);
protected:
// device-level overrides
virtual void device_start() override;
virtual void device_reset() override;
// optional information overrides
virtual void device_add_mconfig(machine_config &config) override;
// device_nvram_interface overrides
virtual void nvram_default() override { }
virtual bool nvram_read(util::read_stream &file) override { size_t actual; return !file.read(m_nvram, 0x2000, actual) && actual == 0x2000; }
virtual bool nvram_write(util::write_stream &file) override { size_t actual; return !file.write(m_nvram, 0x2000, actual) && actual == 0x2000; }
// device_vic20_expansion_card_interface overrides
virtual uint8_t vic20_cd_r(offs_t offset, uint8_t data, int ram1, int ram2, int ram3, int blk1, int blk2, int blk3, int blk5, int io2, int io3) override;
virtual void vic20_cd_w(offs_t offset, uint8_t data, int ram1, int ram2, int ram3, int blk1, int blk2, int blk3, int blk5, int io2, int io3) override;
private:
memory_share_creator<uint8_t> m_nvram;
int m_nvram_en;
};
// device type definition
DECLARE_DEVICE_TYPE(VIC20_MEGACART, vic20_megacart_device)
#endif // MAME_BUS_VIC20_MEGACART_H
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