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-rw-r--r--src/devices/bus/plus4/user.h33
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diff --git a/src/devices/bus/plus4/user.h b/src/devices/bus/plus4/user.h
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+// license:BSD-3-Clause
+// copyright-holders:smf
+/**********************************************************************
+
+ Commodore Plus/4 User Port emulation
+
+**********************************************************************
+
+ GND 1 A GND
+ +5V 2 B P0
+ _BRESET 3 C RxD
+ P2 4 D RTS
+ P3 5 E DTR
+ P4 6 F P7
+ P5 7 H DCD
+ RxC 8 J P6
+ ATN 9 K P1
+ +9VAC 10 L DSR
+ +9VAC 11 M TxD
+ GND 12 N GND
+
+**********************************************************************/
+
+#pragma once
+
+#ifndef __PLUS4_USER_PORT__
+#define __PLUS4_USER_PORT__
+
+#include "bus/vic20/user.h"
+
+SLOT_INTERFACE_EXTERN( plus4_user_port_cards );
+
+#endif