1 files changed, 51 insertions, 0 deletions
diff --git a/src/devices/bus/amiga/zorro/a2058.h b/src/devices/bus/amiga/zorro/a2058.h
new file mode 100644
index 00000000000..0d3b6771c1f
--- /dev/null
+++ b/src/devices/bus/amiga/zorro/a2058.h
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+// license:GPL-2.0+
+// copyright-holders:Dirk Best
+/***************************************************************************
+
+    Commodore A2058
+
+    Zorro-II RAM Expansion (2, 4 or 8 MB)
+
+***************************************************************************/
+
+#ifndef MAME_BUS_AMIGA_ZORRO_A2058_H
+#define MAME_BUS_AMIGA_ZORRO_A2058_H
+
+#pragma once
+
+#include "zorro.h"
+#include "machine/autoconfig.h"
+
+
+//**************************************************************************
+//  TYPE DEFINITIONS
+//**************************************************************************
+
+// ======================> a2058_device
+
+class a2058_device : public device_t, public device_zorro2_card_interface, public amiga_autoconfig
+{
+public:
+	// construction/destruction
+	a2058_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
+
+protected:
+	virtual ioport_constructor device_input_ports() const override;
+	virtual void device_start() override;
+
+	// device_zorro2_card_interface overrides
+	virtual DECLARE_WRITE_LINE_MEMBER( cfgin_w ) override;
+
+	// amiga_autoconfig overrides
+	virtual void autoconfig_base_address(offs_t address) override;
+
+private:
+	required_ioport m_config;
+	std::unique_ptr<uint16_t[]> m_ram;
+	int m_ram_size;
+};
+
+// device type definition
+DECLARE_DEVICE_TYPE(A2058, a2058_device)
+
+#endif // MAME_BUS_AMIGA_ZORRO_A2058_H