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-rw-r--r--src/devices/bus/z88/ram.h85
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diff --git a/src/devices/bus/z88/ram.h b/src/devices/bus/z88/ram.h
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+// license:BSD-3-Clause
+// copyright-holders:Sandro Ronco
+#pragma once
+
+#ifndef __Z88_RAM_H__
+#define __Z88_RAM_H__
+
+#include "emu.h"
+#include "z88.h"
+
+//**************************************************************************
+// TYPE DEFINITIONS
+//**************************************************************************
+
+// ======================> z88_32k_ram_device
+
+class z88_32k_ram_device : public device_t,
+ public device_z88cart_interface
+{
+public:
+ // construction/destruction
+ z88_32k_ram_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+ z88_32k_ram_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, UINT32 clock, const char *shortname, const char *source);
+
+protected:
+ // device-level overrides
+ virtual void device_start();
+
+ // z88cart_interface overrides
+ virtual DECLARE_READ8_MEMBER(read);
+ virtual DECLARE_WRITE8_MEMBER(write);
+ virtual UINT8* get_cart_base();
+ virtual UINT32 get_cart_size() { return 0x8000; }
+
+protected:
+ // internal state
+ UINT8 * 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, UINT32 clock);
+
+protected:
+ // z88cart_interface overrides
+ virtual UINT32 get_cart_size() { 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, UINT32 clock);
+
+protected:
+ // z88cart_interface overrides
+ virtual UINT32 get_cart_size() { 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, UINT32 clock);
+
+protected:
+ // z88cart_interface overrides
+ virtual UINT32 get_cart_size() { return 0x100000; }
+};
+
+// device type definition
+extern const device_type Z88_32K_RAM;
+extern const device_type Z88_128K_RAM;
+extern const device_type Z88_512K_RAM;
+extern const device_type Z88_1024K_RAM;
+
+#endif /* __Z88_RAM_H__ */