Extended emulator of МК 61/54

Vadym Khokhlov

About this app

МК 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 dialog
Hint 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://xvadim.github.io/xbasoft/pmk/pmk.html
Hit 4: you can open menu by long tap on the "Вкл" label.

WARNING: Support of internal slots (Save/Load) is deprecated and will be deleted soon. Please, use export/import to external files.

If you want to support this project, please, buy Emulator of MK 61/54 Donation: https://play.google.com/store/apps/details?id=org.xbasoft.pmk_donate

Ratings and reviews

It is the only calculator on my phone now. Great job! Thank you! Just one request - to make it compatible with mk52 - there are a lot of the programs on the external cards there, including astro navigation programs . It was a "must have" set on the USSR NAVY at the end of 80s - BRP-ASTRO. Sone progs you have to load sequentialy to use previous results. Now, these progs are mostly useless as the astro constants work till abt 2000. But the constant can be modified.

Being a precise device emulator for historical purposes, it is still an extremely lightweight and powerful calculator app for general use. No ads, no tracking, no permissions required --no problem.

This app works just like the real calculator and it allows you to save the programs. I have made the gold donation because I am very happy with it. Это приложение работает в точности как настоящий калькулятор, и позволяет сохранять программы. Я сделал золотой донат, потому что очень доволен приложением.

What’s new

- fix buttons labels