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-rw-r--r--src/devices/bus/plus4/diag264_lb_user.h59
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diff --git a/src/devices/bus/plus4/diag264_lb_user.h b/src/devices/bus/plus4/diag264_lb_user.h
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+++ b/src/devices/bus/plus4/diag264_lb_user.h
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+// license:BSD-3-Clause
+// copyright-holders:smf
+/**********************************************************************
+
+ Diag264 User Port Loop Back Connector emulation
+
+**********************************************************************/
+
+#pragma once
+
+#ifndef __DIAG264_USER_PORT_LOOPBACK__
+#define __DIAG264_USER_PORT_LOOPBACK__
+
+#include "emu.h"
+#include "user.h"
+
+
+
+//**************************************************************************
+// TYPE DEFINITIONS
+//**************************************************************************
+
+// ======================> diag264_user_port_loopback_device
+
+class diag264_user_port_loopback_device : public device_t,
+ public device_pet_user_port_interface
+{
+public:
+ // construction/destruction
+ diag264_user_port_loopback_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+
+protected:
+ // device-level overrides
+ virtual void device_start();
+
+ // device_pet_user_port_interface overrides
+ virtual DECLARE_WRITE_LINE_MEMBER(input_b) { output_6(state); }
+ virtual DECLARE_WRITE_LINE_MEMBER(input_k) { output_7(state); }
+ virtual DECLARE_WRITE_LINE_MEMBER(input_4) { output_j(state); }
+ virtual DECLARE_WRITE_LINE_MEMBER(input_5) { output_f(state); }
+
+ virtual DECLARE_WRITE_LINE_MEMBER(input_6) { output_b(state); }
+ virtual DECLARE_WRITE_LINE_MEMBER(input_7) { output_k(state); }
+ virtual DECLARE_WRITE_LINE_MEMBER(input_j) { output_4(state); }
+ virtual DECLARE_WRITE_LINE_MEMBER(input_f) { output_5(state); }
+
+ virtual DECLARE_WRITE_LINE_MEMBER(input_c) { output_m(state); }
+ virtual DECLARE_WRITE_LINE_MEMBER(input_d) { output_l(state); }
+ virtual DECLARE_WRITE_LINE_MEMBER(input_e) { output_h(state); }
+
+ virtual DECLARE_WRITE_LINE_MEMBER(input_m) { output_c(state); }
+ virtual DECLARE_WRITE_LINE_MEMBER(input_l) { output_d(state); }
+ virtual DECLARE_WRITE_LINE_MEMBER(input_h) { output_e(state); }
+};
+
+// device type definition
+extern const device_type DIAG264_USER_PORT_LOOPBACK;
+
+#endif