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diff --git a/qtmips_cli/chariohandler.h b/qtmips_cli/chariohandler.h
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+// SPDX-License-Identifier: GPL-2.0+
+/*******************************************************************************
+ * QtMips - MIPS 32-bit Architecture Subset Simulator
+ *
+ * Implemented to support following courses:
+ *
+ *   B35APO - Computer Architectures
+ *   https://cw.fel.cvut.cz/wiki/courses/b35apo
+ *
+ *   B4M35PAP - Advanced Computer Architectures
+ *   https://cw.fel.cvut.cz/wiki/courses/b4m35pap/start
+ *
+ * Copyright (c) 2017-2019 Karel Koci<cynerd@email.cz>
+ * Copyright (c) 2019      Pavel Pisa <pisa@cmp.felk.cvut.cz>
+ *
+ * Faculty of Electrical Engineering (http://www.fel.cvut.cz)
+ * Czech Technical University        (http://www.cvut.cz/)
+ *
+ * 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., 51 Franklin Street, Fifth Floor,
+ * Boston, MA  02110-1301, USA.
+ *
+ ******************************************************************************/
+
+#ifndef CHARIOHANDLER_H
+#define CHARIOHANDLER_H
+
+#include <QObject>
+#include <QIODevice>
+#include <QSet>
+
+class CharIOHandler : public QIODevice
+{
+    Q_OBJECT
+
+    using Super = QIODevice;
+
+public:
+    explicit CharIOHandler(QIODevice *iodev, QObject *parent = nullptr);
+    virtual ~CharIOHandler() override;
+
+public slots:
+    void writeByte(unsigned int data);
+    void writeByte(int fd, unsigned int data);
+    void readBytePoll(int fd, unsigned int &data, bool &available);
+
+public:
+    void insertFd(const int &fd);
+    void removeFd(const int &fd);
+
+    virtual bool isSequential() const override;
+    virtual bool open(OpenMode mode) override;
+    virtual void close() override;
+    virtual qint64 pos() const override;
+    virtual qint64 size() const override;
+    virtual bool seek(qint64 pos) override;
+    virtual bool atEnd() const override;
+    virtual bool reset() override;
+    virtual qint64 bytesAvailable() const override;
+    virtual qint64 bytesToWrite() const override;
+    virtual bool canReadLine() const override;
+    virtual bool waitForReadyRead(int msecs) override;
+    virtual bool waitForBytesWritten(int msecs) override;
+protected:
+    virtual qint64 	readData(char *data, qint64 maxSize) override;
+    virtual qint64 	readLineData(char *data, qint64 maxSize) override;
+    virtual qint64 	writeData(const char *data, qint64 maxSize) override;
+private:
+    QIODevice *iodev;
+    bool fd_specific;
+    QSet<int> fd_list;
+};
+
+#endif // CHARIOHANDLER_H