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Diffstat (limited to 'src/devices/bus/bbc/1mhzbus/cfa3000opt.h')
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diff --git a/src/devices/bus/bbc/1mhzbus/cfa3000opt.h b/src/devices/bus/bbc/1mhzbus/cfa3000opt.h
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+++ b/src/devices/bus/bbc/1mhzbus/cfa3000opt.h
@@ -0,0 +1,50 @@
+// license:BSD-3-Clause
+// copyright-holders:Nigel Barnes
+/**********************************************************************
+
+ Henson CFA 3000 Option Board
+
+**********************************************************************/
+
+#ifndef MAME_BUS_BBC_1MHZBUS_CFA3000OPT_H
+#define MAME_BUS_BBC_1MHZBUS_CFA3000OPT_H
+
+#pragma once
+
+#include "1mhzbus.h"
+
+
+//**************************************************************************
+// TYPE DEFINITIONS
+//**************************************************************************
+
+// ======================> cfa3000_opt_device
+
+class cfa3000_opt_device :
+ public device_t,
+ public device_bbc_1mhzbus_interface
+{
+public:
+ // construction/destruction
+ cfa3000_opt_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
+
+ DECLARE_READ8_MEMBER(option_r);
+
+protected:
+ // device-level overrides
+ virtual void device_start() override;
+ virtual void device_reset() override;
+
+ // optional information overrides
+ virtual ioport_constructor device_input_ports() const override;
+
+private:
+ required_ioport m_opt;
+};
+
+
+// device type definition
+DECLARE_DEVICE_TYPE(CFA3000_OPT, cfa3000_opt_device)
+
+
+#endif // MAME_BUS_BBC_1MHZBUS_CFA3000OPT_H