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Welcome to Darek Mihocka's Emulators.com web site.  Since 1986 my collaborators and I have pioneered the development of some of the world's first Atari 8-bit, Atari ST, and Apple Macintosh emulators for MS-DOS and Windows PCs, published papers on emulation, contributed to third party emulators such as Bochs, and authored over a dozen U.S. patents on emulation and virtual machines.

What started out as a hobby in the 80's has turned into a 30+ year professional career at tech giants such as Microsoft, Intel, and Amazon.   I was on the ground floor of such projects as x86 emulation for Xbox 360, Windows HPC compute instances for the AWS cloud, and Time Travel Debugging in Windows.  For the past decade I have had the privilege of a front row engineering seat in the evolution and rise of Windows on ARM for Qualcomm Snapdragon and Apple Silicon M-series processors.

As we enter 2024, ARM64 threatens the market leadership of AMD and Intel.  The industry now finds itself in an intense CPU IPC Supremacy Race which is leading the way to faster laptops, better developer tools, and longer battery life!

New to ARM64?  A lot of people still are, that's ok.  Allow me to share my knowledge, experience, and enthusiasm about ARM64 with a series of online tutorials and videos I am calling ARM64 Boot Camp.  Links to the first few posts and useful reference material are there on the right -->

Celebrating 40 years of the Atari desktop computing at VCF 2019

Thank you to everyone who attended the Vintage Computer Festival 2019 in Seattle, March 23-24 2019 at the Living Computers Museum.  Emulators.com exhibited our original 1979-1993 era Atari 800, XL, XE, TT, and Falcon computers as well exhibiting the MIST FPGA re-implementation of the Atari TT, and making the first public demos of Xformer 10 and HATARI emulators compiled for long battery-life ARM64 laptops such as Lenovo Yoga.

Run hundreds of Atari 800 and 130XE games at once!  Click the video above for a brief intro demo, or the video below for detailed 13-minute walkthrough of every... single... cool... new... holy... cow... I... didn't... know... I... needed.. this... how... have... I... lived... without... it... feature!

Read the Xformer 10 announcement

Xformer 10 for Windows 10 is now available!
Download Xformer 10 for Windows 10

Download Visual Studio 2017 C++ Runtime for x86/x64/ARM64
(prerequisite for running Xformer 10 on Windows 10/11 PCs)

Read our blog posting on ARM64...

Windows 10 Pro on ARM64

XFORMER 10 download shortcuts:

XFORMER 10 (original October 10 2018 release and documentation)

XFORMER 10 latest bug fixes and development repository for Windows 10 and 11:
 GitHub source  pre-built binary

ARM64 Boot Camp

- Introduction

  - The Genius of ARM64

  - History of Windows on ARM

  - Developer Tools

  - ARM64EC Explained

  - x86/x64 Emulation

  - $250 Laptop Bake-off (video)

  - Tour of Devices (video)

Windows on ARM external links:

Visual C++ Redistributables

OpenGL/Vulkan compat pack

Mesa Dozen (Vulkan-on-D3D12)

Windows Insider blog

Windows Insider ARM64 images

Windows Insider SDK download

Visual Studio 2022 download

Time Travel Debugging tools

Windows Debugger for ARM64

UTM for Windows on Mac

Microsoft ARM64EC reference

Darwinia game demo for ARM64

ARM64 demo videos:

Incremental porting to ARM64EC

HATARI for ARM64 at VCF 2019:
The emulators.com team is proud to demonstrate and release the world's first native ARM64 port of Hatari (Atari ST/STe/TT emulator) for Windows 10 on ARM64.  Visit our booth at the 2019 Vintage Computer Festival Pacific Northwest in Seattle to celebrate 40 Years Of Atari Desktop Computers. (More)

XFORMER 10 at VCF 2019:
The emulators.com team is bringing our vintage Atari 800, 800XL, and 130XE hardware to the 2019 Vintage Computer Festival Pacific Northwest in Seattle to celebrate 40 Years Of Atari Desktop Computers. (More)

Windows 10 arrives for ARM64:
ARM chips are not for toy devices anymore! Windows 10 is now shipping on ARM64 based tablets and laptops which feature long battery life, x86 compatibility, and fast 64-bit performance.

Haswell's great leap forward:
The Intel Haswell processor has arrived!  Darek looks at what makes this the most significant improvement to x86 in many years.

The year of Smaller, Thinner, Faster: A look back a 2011.
From AVX to Ultrabooks to Bochs 2.5, Darek looks back at 2011's interesting events and gadgets.

Darek's latest paper on high-speed simulation techniques, presented at the 4th AMAS-BT workshop at ISCA 2011 in San Jose, California.
 (Read Paper as PDF)

Long Live PowerPC G5:
A look back at what is still a very useful processor.

ISCA 2010:
An overview of the 2010 ISCA conference held in St. Malo France.

Bochs 2.4.5:
Learn more about how to build it for Windows, Mac OS X, and Linux:
 (Download .EXE)
 (Download sources)

The easy upgrade from Windows XP to Windows 7 without re-installing:

Travel back in time on YouTube to see these low budget Emulators.com classic demo videos:

Gemulator promo video from 1992:   Part 1   Part 2   Part 3

SoftMac 2000 instructional videos from 2001:   #1   #2   #3   #4   #5

A little bit more history about us.  More than five years before Apple made the switch to Intel in 2006, our SoftMac emulator was already running unmodified Mac OS on Dell, Sony, and Gateway PCs in the late 1990's.  We proved it was possible.

SoftMac logo

On August 13th 2007, we started a public beta of the 9th generation of Gemulator and SoftMac, bringing Windows Vista compatibility and 64-bit Core 2 support to our flagship products. The final Gemulator 9.0 release was made on December 1 2008.

Gemulator 9.0 is available as open source.
Download GEMULATOR 9.0

Emulators.com has contributed code and optimization ideas to numerous open source emulation projects including vMac, Basilisk II, and the Bochs x86 emulation project, the gold standard of PC emulators, now supporting 64-bit Linux and Windows emulation!

Download BOCHS 2.6.9 from SourceForge

Learn more about building BOCHS

The authors of Bochs, Gemulator, and SoftMac presented the case for emulation on June 21 2008 at the AMAS-BT workshop, part of the ISCA 2008 computer architecture conference in Beijing, China. View the Virtualization Without Direct Execution paper and slides.

Follow-up papers were presented at workshops at the 2010 CGO conference in Toronto, Canada, explaining improved Overflow Detection (paper and slides), and at the 2011 ISCA conference in San Jose on Fast Microcode Simulation (paper).

SoftMac 2000 CD-ROM with Fusion PC 3.0

Got an older PC? No problem! Our SOFTMAC 2000 and FUSION PC 3.0 emulators are best suited for use with 486 and Pentium based MS-DOS and Windows 95 systems. Download them and bring new life to your old PC. These emulators use under 1 megabyte of disk space and can be booted from floppy disk, CD-ROM, or the network without requiring prior installation to the hard disk.

SoftMac 2000 CD-ROMs including Fusion PC and free Mac software are available free of charge. Send a self-addressed stamped disk mailer to receive your SoftMac 2000 CD-ROM.

Our site also features the free Xformer Atari 400/800 emulator, and Gemulator, the original Atari ST emulator.


The fundamental design of the microprocessors that power Windows, Mac OS X, and Linux is flawed. 20 years of security promises have fallen flat, leading to consumer frustration and a malware epidemic. How can emulation fix this mess?

Darek's Secrets
Tips for getting the most from your Apple Mac, Windows PC, or netbook.
(Latest) (Archives)

Pentium 4: In Depth
Writing efficient code means understanding the pitfalls of the hardware.

Find out which PCs our products run on and how fast they run. Now with Intel Core 2 benchmark results.

Free Downloads
Official releases of SoftMac, Fusion PC, Gemulator, Gemulator Explorer, and Xformer.

News and Announcements
Latest product announcements, emulation news, and show updates.

Emulators Inc.
Our mission and contact information.

Frequently Asked Questions
Need help getting started with our products? Want a better understanding of emulation? Your questions are answered here.

Mac disks on the PC
Do you need to read a Macintosh or Atari ST disk on your PC to copy over a few files? All you need is our free Gemulator Explorer utility!

SoftMac Info
Find out more about SoftMac - the Apple Macintosh emulator for Windows. Check the hardware requirements for your PC, download SoftMac, and learn how to install it and run it.

Windows XP Secrets
We've got some great reasons to upgrade to Windows XP. And lots of handy tips!

Atari ST/STE emulation

Pictured above: the CALAMUS SL desktop publishing program for the Atari ST, running in a virtual Atari ST desktop on Microsoft Windows using the Gemulator 2000 Atari ST emulator.

In the summer of 1992 we launched the world's first Atari ST emulator - GEMULATOR.

Originally designed for 486 processors running MS-DOS, Gemulator 2000 emulator offers fast Atari ST and STE emulation on Windows 95, 98, 2000, and XP.

Atari ST emulation page
Run TOS, GEM, Calamus, Pagestream, GFA Basic, and other Atari ST and Macintosh Plus software on your PC. Find out how with Gemulator 2000.

Atari 8-bit emulation

Pictured above: two virtual Atari 800 windows running on Microsoft Windows using the Xformer 2000 Atari 8-bit emulator. Each virtual Atari 800 is running a completely different program - one is running Atari BASIC, the other is running the well known game STAR RAIDERS.

We released the world's first Atari 400/800 emulator - XFORMER - in January 1987.

Today we offer the free Xformer 2000 emulator which runs Atari BASIC programs and Atari 8-bit video games on Windows 95, 98, 2000, and XP.

Atari 8-bit emulation page
Running Atari 8-bit software on your PC has never been easier. Find out how with Xformer 2000.

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Apple, Mac OS, Macbook, Apple Silicon and Macintosh are registered trademarks of Apple Computer, Inc. Atari is a registered trademark of Atari U.S. Corporation. Athlon, Athlon XP, Opteron, Phenom, and Ryzen are registered trademarks of AMD. Arm is a registered trademark of Arm Limited. Microsoft, Windows, Windows NT, Windows XP, Windows Vista, Windows 7, Windows 8, Windows 10, Windows 11, Visual Studio, .NET, and/or other Microsoft products referenced herein are either trademarks or registered trademarks of Microsoft. Intel, Pentium, Core 2, Core i7, and Atom are registered trademarks of Intel. PowerPC is a trademark of IBM. Additional company and product names may be trademarks or registered trademarks of the individual companies and are respectfully acknowledged.