Bochs

Free plan LinuxMacWindows

What Bochs is

Bochs is a free, open-source emulator that models IA-32 x86 PC hardware. It emulates Intel CPU families from 386 through x86-64, common I/O devices, and a custom BIOS, allowing users to run guest systems such as Linux, DOS, and Windows. Optional command-line and graphical debuggers can inspect registers and memory and set breakpoints. Graphics options include VGA, VESA VBE, Cirrus Logic video, and four 3dfx Voodoo adapter models. Bochs can emulate several USB controllers and devices, and on some host systems can forward guest packets to a physical network. Multiprocessor simulation supports up to 254 processor threads, but is described as experimental. The emulator uses a single-threaded simulation core and does not use dynamic code translation or virtualization. It supplies virtual hardware rather than a setup wizard or guest installation media, so users must install their own guest operating system. Users can install a binary package or compile from source; some features, including the debugger, may require compiling it themselves. Bochs runs on Windows, GNU/Linux, FreeBSD, OpenBSD, and MacOS X, among other documented ports.

Who it suits

Bochs suits users who need to emulate x86 PC hardware and are prepared to configure virtual hardware and install a guest operating system themselves. Its optional debuggers may also suit users examining guest registers or memory.

What it does well

Free and open source
Emulates x86 from 386 through x86-64
Optional command-line and GUI debuggers
Supports multiple graphics and USB device models

What to know first

No setup wizard or guest installation disk
Some features may require compiling from source
Multiprocessor simulation is experimental
Uses a single-threaded simulation core

Limits

The free Bochs plan has no listed time limit. It does not include a setup wizard or guest installation media, and some features may require building Bochs from source; multiprocessor emulation is experimental.

Plans

Plan	Billed and limits	Price
Bochs	No setup wizard · guest OS installation is user's responsibility · some features require compiling from source	Free

As bochs.sourceforge.io lists them, read 1 Oct 2026. The maker's own page has the final word.

Getting started

Visit the Bochs website.
Install a binary package or compile Bochs from source.
Compile from source if a needed feature, such as the debugger, requires it.
Prepare and install your chosen guest operating system yourself.

Verdict

Bochs offers detailed x86 hardware emulation and optional debugging without a price. Setup takes user effort: the guest OS is the user's responsibility, and certain features may require a source build.

Questions

How much does Bochs cost?

Bochs is free, with a listed plan price of $0.

Which host platforms does it support?

The listed platforms are Linux, macOS, and Windows. Other documented ports include FreeBSD, OpenBSD, Solaris, IRIX, AIX, AmigaOS, and MorphOS.

Which guest operating systems can it run?

It supports x86 guests including Linux, DOS, Windows, BSD, and other x86 operating systems.

Is Bochs open source?

Yes. The Bochs Project distributes it under the GNU Lesser General Public License.

Does it emulate networking?

It emulates NE2000 or Intel 82540EM network adapters. On several host systems, guest packets can be forwarded to a physical network.

How do I install a guest system?

Bochs supplies virtual hardware but no setup wizard or recovery or installation disk. Users handle installing the guest OS.

Facts from Bochs's own pages

Clipboard: Depending on the host platform, text can be copied between the text-mode screen and the guest OS clipboard through simulated keystrokes. · bochs.sourceforge.io, 1 Oct 2026
CPU range: It can emulate Intel CPU families from 386 through recent x86-64 Intel and AMD processors. · bochs.sourceforge.io, 1 Oct 2026
Debugger: It provides optional command-line and GUI debuggers for examining registers and memory and setting breakpoints. · bochs.sourceforge.io, 1 Oct 2026
Emulated systems: It includes Intel x86 CPU, common I/O-device, and custom-BIOS emulation. · bochs.sourceforge.io, 1 Oct 2026
Founded: 1994 · bochs.sourceforge.io, 28 Sept 2026
Graphics: The emulator supports VGA, VESA VBE resolutions up to 2560x1600x32bpp, Cirrus Logic video, and four 3dfx Voodoo adapter models. · bochs.sourceforge.io, 1 Oct 2026
Guest operating systems: Bochs can run most operating systems inside the emulation, including Linux, DOS, and Microsoft Windows. · bochs.sourceforge.io, 1 Oct 2026
Installation: Users can install a binary package or compile from source, and some features such as the debugger may require compiling Bochs themselves. · bochs.sourceforge.io, 1 Oct 2026
License: The Bochs Project distributes Bochs under the GNU Lesser General Public License. · bochs.sourceforge.io, 1 Oct 2026
Multiprocessor emulation: It can be configured to simulate up to 254 processor threads, although this feature is described as experimental. · bochs.sourceforge.io, 1 Oct 2026
Networking: It emulates NE2000 or Intel 82540EM network adapters and can forward guest packets to the physical network on several host systems. · bochs.sourceforge.io, 1 Oct 2026
Performance model: Bochs does not attempt dynamic code translation or virtualization and uses a single-threaded simulation core. · bochs.sourceforge.io, 1 Oct 2026
Setup requirements: There is no setup wizard or recovery or installation disk; Bochs supplies virtual hardware and users handle guest OS installation. · bochs.sourceforge.io, 1 Oct 2026
Support: The project directs unresolved runtime issues to its developers mailing list or SourceForge bug tracker. · bochs.sourceforge.io, 1 Oct 2026
USB: Bochs supports UHCI, OHCI, EHCI, and xHCI controllers plus emulated mouse, tablet, keyboard, disk, CD-ROM, floppy, hub, and printer devices. · bochs.sourceforge.io, 1 Oct 2026
What it does: Bochs is a highly portable open-source IA-32 (x86) PC emulator written in C++. · bochs.sourceforge.io, 1 Oct 2026

Where Bochs stands on Freedom251

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