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// license:BSD-3-Clause
// copyright-holders:Sandro Ronco
#ifndef MAME_BUS_Z88_RAM_H
#define MAME_BUS_Z88_RAM_H
#pragma once
#include "z88.h"
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> z88_32k_ram_device
class z88_32k_ram_device : public device_t,
public device_nvram_interface,
public device_z88cart_interface
{
public:
// construction/destruction
z88_32k_ram_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock);
protected:
z88_32k_ram_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, const XTAL &clock);
// device-level overrides
virtual void device_start() 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 (get_cart_base(), get_cart_size(), actual) && actual == get_cart_size(); }
virtual bool nvram_write(util::write_stream &file) override { size_t actual; return !file.write(get_cart_base(), get_cart_size(), actual) && actual == get_cart_size(); }
// z88cart_interface overrides
virtual uint8_t read(offs_t offset) override;
virtual void write(offs_t offset, uint8_t data) override;
virtual uint8_t* get_cart_base() override;
virtual uint32_t get_cart_size() override { return 0x8000; }
protected:
// internal state
uint8_t * m_ram;
};
// ======================> z88_128k_ram_device
class z88_128k_ram_device : public z88_32k_ram_device
{
public:
// construction/destruction
z88_128k_ram_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock);
protected:
// z88cart_interface overrides
virtual uint32_t get_cart_size() override { return 0x20000; }
};
// ======================> z88_512k_ram_device
class z88_512k_ram_device : public z88_32k_ram_device
{
public:
// construction/destruction
z88_512k_ram_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock);
protected:
// z88cart_interface overrides
virtual uint32_t get_cart_size() override { return 0x80000; }
};
// ======================> z88_1024k_ram_device
class z88_1024k_ram_device : public z88_32k_ram_device
{
public:
// construction/destruction
z88_1024k_ram_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock);
protected:
// z88cart_interface overrides
virtual uint32_t get_cart_size() override { return 0x100000; }
};
// device type definition
DECLARE_DEVICE_TYPE(Z88_32K_RAM, z88_32k_ram_device)
DECLARE_DEVICE_TYPE(Z88_128K_RAM, z88_128k_ram_device)
DECLARE_DEVICE_TYPE(Z88_512K_RAM, z88_512k_ram_device)
DECLARE_DEVICE_TYPE(Z88_1024K_RAM, z88_1024k_ram_device)
#endif // MAME_BUS_Z88_RAM_H
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