Ported the 3c500/3c501 nic from VirtualBox.

Added IRQ's 10 and 11 to the AMD PCnet ISA/VLB nics.

src/include/86box/net_3c501.h

@@ -0,0 +1,44 @@
+/*
+ * 86Box	An emulator of (mostly) x86-based PC systems and devices,
+ *		using the ISA, EISA, VLB, MCA, and PCI system buses,
+ *		roughly spanning the era between 1981 and 1995.
+ *
+ *		This file is part of the 86Box Project.
+ *
+ *		Implementation of the following network controller:
+ *			- 3Com Etherlink 3c500/3c501 (ISA 8-bit).
+ *
+ *
+ *
+ * Based on	@(#)Dev3C501.cpp Oracle (VirtualBox)
+ *
+ * Authors:	TheCollector1995, <mariogplayer@gmail.com>
+ *		Oracle
+ *
+ *		Copyright 2022 TheCollector1995.
+ *		Portions Copyright (C) 2022  Oracle and/or its affilitates.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free  Software  Foundation; either  version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is  distributed in the hope that it will be useful, but
+ * WITHOUT   ANY  WARRANTY;  without  even   the  implied  warranty  of
+ * MERCHANTABILITY  or FITNESS  FOR A PARTICULAR  PURPOSE. See  the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the:
+ *
+ *   Free Software Foundation, Inc.
+ *   59 Temple Place - Suite 330
+ *   Boston, MA 02111-1307
+ *   USA.
+ */
+#ifndef NET_3C501_H
+#define NET_3C501_H
+
+extern const device_t threec501_device;
+
+#endif /*NET_3C501_H*/