Extended emulator of MK 61/54

MK-61 was the best seller of all USSR programmable calculators of 1980-s (B3-34, MK-54, MK-56, MK-61, MK-52).
Calculators are emulated on microcode level so they behave exactly like the original devices, including all non-documented features and inaccurate calculations. For ease of use application features saving and loading emulation states.

This app's emulation engine Java code is based on C++ source of Felix Lazarev's emu145 project.Emulation was highly optimized for speed and should run in real time on any phone.

It's an extended version of the original emulator МК 61/54 by Stanislav Borutsky(https://play.google.com/store/apps/details?id=com.cax.pmk). This version allows to export/import programs from external files and contains some UI improvements.

Hint 0: you can found the list of all tips in the About dialogHint 1: touch calculator's indicator to toggle slow/fast mode. Indicator's blinking looks better in slow mode.Hint 2: you can choose between MK-61 and MK-54 using menu option that becomes visible when calculator is switched off. Hint 3: with the menu "Import" you can import programs from external files, several such programs you can find in https://github.com/xvadim/pmk61-programmsHit 4: you can open menu by long tap on the "Вкл" label.