Emulator of EPOS-73

This project introduces a console application designed for functional and behavioral emulation of the old Soviet calculator EPOS-73 (ЭПОС-73) also known as Elektronika B3-11 (Электроника Б3-11). The project is conceived as an auxiliary for verification of the switch-level simulator based on Verilog HDL of the said apparatus. Calculator model EPOS-73 is interesting in that it was one of the first models of Soviet computing performed at LSI, that were fully designed by Soviet engineers. It was used a set of four LSIs series K1ZHG451...4 (К1ЖГ451...4) or later designation K145HK1...4 (К145ХК1...4). The choice of this calculator as an object of modeling is due to the presence of (miraculously survived to this day) a sufficient set of design documentation for the technology applied in its LSIs, including a technical description of the device, revealing its calculating algorithms. The project is intended for research and education purposes.