Source: https://www.researchgate.net/profile/Qasem-Abu-Al-Haija/publication/259293081_An_8-Bit_Scientific_Calculator_Based_Intel_8086_Virtual_Machine_Emulator/links/0deec52acf5865cb64000000/An-8-Bit-Scientific-Calculator-Based-Intel-8086-Virtual-Machine-Emulator.pdf