Extended emulator of МК 61/54

Vadym Khokhlov | Calculator

6 Downloads 16 Views v3.3 263.15 KB 4.1+

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(263.15 KB)

Editor's Overview

Extended emulator of МК 61/54 is a calculator application developed by Vadym Khokhlov, packaged as a single Android APK of version 3.3 weighing in at 263.15 KB. The package targets Android 4.1+ and above. Below you'll find the publisher's own description, a quick spec sheet, and a short buyer-beware checklist so you know exactly what you're installing before tapping download.

Install Checklist

Only download through the button on this page — never from third-party mirrors or shortened links, which are the most common way malware spreads.
File size is a light 263.15 KB, so it installs quickly even on modest connections.
This build is signed by "Vadym Khokhlov" — always verify the developer name matches what's listed on the app's official store page before installing an update.
After install, Android may prompt you to allow "Install from unknown sources" — approve only this one install, then revoke the permission in Settings > Apps > Special access.
We link directly to the APK file or the publisher's repository; we do not modify the binary. Always run a virus scan after any sideloaded install.

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.

Details

Version	v3.3
Size	263.15 KB
Developer	Vadym Khokhlov
Category	Calculator
Package	com.cax.pmk.ext
Android	4.1+
Last Updated	Oct 29, 2026
Downloads	6

Frequently Asked Questions

Is Extended emulator of МК 61/54 free to download?
Yes. The APK file linked from this page is free. The developer may offer in-app purchases once installed, but obtaining the installer itself costs nothing.

What Android version does Extended emulator of МК 61/54 require?
Android 4.1+ or newer. Installing on older devices may cause crashes or refuse to install.

Is Extended emulator of МК 61/54 safe to install?
We link to the exact APK published by Vadym Khokhlov. We do not modify the file. Still, as with any sideloaded app, scan it with a reputable antivirus before opening it, and only grant permissions the app genuinely needs.

How do I update Extended emulator of МК 61/54?
Install the newer version on top of the old one — Android will keep your data. If the signature differs, uninstall first (you may lose local progress).

Why is the app not installing?
Common causes: not enough storage, an older Android version than 4.1+, or a conflicting build already installed. Free up space, check your OS version, and uninstall any previous copy before retrying.

How to Download & Install Extended emulator of МК 61/54

Tap the Download APK button above and save the file to your device.
Open your device Settings → Security (or Apps → Special access → Install unknown apps) and allow your file manager or browser to install unknown apps for this one file only.
Open the downloaded com.cax.pmk.ext.apk file from your Downloads folder.
Tap Install and wait for Android to finish.
Open «Extended emulator of МК 61/54» by Vadym Khokhlov and grant only the permissions it actually needs.
Revoke the "unknown sources" permission once you are done installing.

Note: this page hosts or links to the installer only. The application name, icon and description are provided for identification. All trademarks belong to their respective owners.