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diff --git a/src/mess/machine/ti99/myarcmem.h b/src/mess/machine/ti99/myarcmem.h
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+/****************************************************************************
+
+ TI-99 Myarc memory expansion
+ See myarcmem.c for documentation
+
+ Michael Zapf, September 2010
+ February 2012: Rewritten as class
+
+*****************************************************************************/
+
+#ifndef __MYARCMEM__
+#define __MYARCMEM__
+
+#include "emu.h"
+#include "peribox.h"
+#include "ti99defs.h"
+
+extern const device_type TI99_MYARCMEM;
+
+class myarc_memory_expansion_device : public ti_expansion_card_device
+{
+public:
+ myarc_memory_expansion_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+ DECLARE_READ8Z_MEMBER(readz);
+ DECLARE_WRITE8_MEMBER(write);
+
+ void crureadz(offs_t offset, UINT8 *value);
+ void cruwrite(offs_t offset, UINT8 data);
+
+protected:
+ void device_start(void);
+ void device_reset(void);
+ const rom_entry *device_rom_region(void) const;
+ ioport_constructor device_input_ports() const;
+
+private:
+ int get_base(int offset);
+ UINT8* m_ram;
+ UINT8* m_dsrrom;
+ int m_bank;
+ int m_size;
+};
+
+#endif