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diff --git a/src/devices/bus/a800/rom.h b/src/devices/bus/a800/rom.h
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+// license:BSD-3-Clause
+// copyright-holders:Fabio Priuli
+#ifndef __A800_ROM_H
+#define __A800_ROM_H
+
+#include "a800_slot.h"
+
+
+// ======================> a800_rom_device
+
+class a800_rom_device : public device_t,
+ public device_a800_cart_interface
+{
+public:
+ // construction/destruction
+ a800_rom_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);
+ a800_rom_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+
+ // device-level overrides
+ virtual void device_start();
+ virtual void device_reset();
+
+ virtual DECLARE_READ8_MEMBER(read_80xx);
+};
+
+
+// ======================> a800_rom_bbsb_device
+
+class a800_rom_bbsb_device : public a800_rom_device
+{
+public:
+ // construction/destruction
+ a800_rom_bbsb_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+
+ // device-level overrides
+ virtual void device_start();
+ virtual void device_reset();
+
+ virtual DECLARE_READ8_MEMBER(read_80xx);
+ virtual DECLARE_WRITE8_MEMBER(write_80xx);
+
+protected:
+ int m_banks[2];
+};
+
+
+// ======================> a800_rom_williams_device
+
+class a800_rom_williams_device : public a800_rom_device
+{
+public:
+ // construction/destruction
+ a800_rom_williams_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+
+ // device-level overrides
+ virtual void device_start();
+ virtual void device_reset();
+
+ virtual DECLARE_READ8_MEMBER(read_80xx);
+ virtual DECLARE_WRITE8_MEMBER(write_d5xx);
+
+protected:
+ int m_bank;
+};
+
+
+// ======================> a800_rom_express_device
+
+class a800_rom_express_device : public a800_rom_device
+{
+public:
+ // construction/destruction
+ a800_rom_express_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+
+ // device-level overrides
+ virtual void device_start();
+ virtual void device_reset();
+
+ virtual DECLARE_READ8_MEMBER(read_80xx);
+ virtual DECLARE_WRITE8_MEMBER(write_d5xx);
+
+protected:
+ int m_bank;
+};
+
+
+// ======================> a800_rom_blizzard_device
+
+class a800_rom_blizzard_device : public a800_rom_device
+{
+public:
+ // construction/destruction
+ a800_rom_blizzard_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+
+ // device-level overrides
+ virtual void device_start();
+ virtual void device_reset();
+
+ virtual DECLARE_READ8_MEMBER(read_80xx);
+};
+
+
+// ======================> a800_rom_turbo_device
+
+class a800_rom_turbo_device : public a800_rom_device
+{
+public:
+ // construction/destruction
+ a800_rom_turbo_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+
+ // device-level overrides
+ virtual void device_start();
+ virtual void device_reset();
+
+ virtual DECLARE_READ8_MEMBER(read_80xx);
+ virtual DECLARE_WRITE8_MEMBER(write_d5xx);
+
+protected:
+ int m_bank;
+};
+
+
+// ======================> a800_rom_telelink2_device
+
+class a800_rom_telelink2_device : public a800_rom_device
+{
+public:
+ // construction/destruction
+ a800_rom_telelink2_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+
+ virtual DECLARE_READ8_MEMBER(read_80xx);
+ virtual DECLARE_WRITE8_MEMBER(write_80xx);
+ virtual DECLARE_READ8_MEMBER(read_d5xx);
+ virtual DECLARE_WRITE8_MEMBER(write_d5xx);
+};
+
+
+// ======================> a800_rom_microcalc_device
+
+class a800_rom_microcalc_device : public a800_rom_device
+{
+public:
+ // construction/destruction
+ a800_rom_microcalc_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+
+ // device-level overrides
+ virtual void device_start();
+ virtual void device_reset();
+
+ virtual DECLARE_READ8_MEMBER(read_80xx);
+ virtual DECLARE_WRITE8_MEMBER(write_d5xx);
+
+protected:
+ int m_bank;
+};
+
+
+// ======================> xegs_rom_device
+
+class xegs_rom_device : public a800_rom_device
+{
+public:
+ // construction/destruction
+ xegs_rom_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+
+ // device-level overrides
+ virtual void device_start();
+ virtual void device_reset();
+
+ virtual DECLARE_READ8_MEMBER(read_80xx);
+ virtual DECLARE_WRITE8_MEMBER(write_d5xx);
+
+protected:
+ int m_bank;
+};
+
+
+// ======================> a5200_rom_2chips_device
+
+class a5200_rom_2chips_device : public a800_rom_device
+{
+public:
+ // construction/destruction
+ a5200_rom_2chips_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+
+ virtual DECLARE_READ8_MEMBER(read_80xx);
+};
+
+
+// ======================> a5200_rom_bbsb_device
+
+class a5200_rom_bbsb_device : public a800_rom_device
+{
+public:
+ // construction/destruction
+ a5200_rom_bbsb_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+
+ // device-level overrides
+ virtual void device_start();
+ virtual void device_reset();
+
+ virtual DECLARE_READ8_MEMBER(read_80xx);
+ virtual DECLARE_WRITE8_MEMBER(write_80xx);
+
+protected:
+ int m_banks[2];
+};
+
+
+
+// device type definition
+extern const device_type A800_ROM;
+extern const device_type A800_ROM_BBSB;
+extern const device_type A800_ROM_WILLIAMS;
+extern const device_type A800_ROM_EXPRESS;
+extern const device_type A800_ROM_TURBO;
+extern const device_type A800_ROM_TELELINK2;
+extern const device_type A800_ROM_MICROCALC;
+extern const device_type XEGS_ROM;
+extern const device_type A5200_ROM_2CHIPS;
+extern const device_type A5200_ROM_BBSB;
+
+
+#endif