b-em – open source BBC Micro emulator

B-em is an emulator for various models of BBC Microcomputer, produced by Acorn Computers in the 1980s.

B-em runs under Linux and Windows, but may also work on other systems supported by the Allegro library.

The emulator is released under an open source license.

Features include:

  • Emulates Models A, B, B+, Master 128, Master 512, Master Turbo and Master Compact.
  • Also emulates ARM evaluation system on Master 128.
  • Emulates 6502 external, 6502 internal, 65816, 80186, ARM, Z80 and 32016 tubes. Configurable tube speed: 100%, 200%, 400%, 800%, 1600%, 3200%, and 6400%.
  • Cycle-accurate video emulation.
  • Configurable speed including full speed.
  • All documented and undocumented 6502 instructions.
  • 8271 Floppy Disc Controller emulated (double drive, double sided, 80 track, read/write).
  • 1770-based Floppy Disc Controllers from various manufacturers emulated including Acorn, Opus, Solidisk, Watford Electronics (double drive, double sided, 80 track, read/write).
  • Supports following disc formats – .ssd, .dsd, .adf, .adl, .img, .fdi and variants for the non-Acorn DFSes.
  • Supports tape formats: .uef and .csw.
  • Can run many protected disc and tape games.
  • SCSI and IDE hard disc emulation.
  • Sound emulation, including sample playback.
  • BeebSID emulation.
  • Hybrid Music System emulating including Music 500o (synth), Music 4000 (keyboard, emulated via MIDI) and Music 2000 (MIDI).
  • Full screen option.
  • Lots of video tricks, such as overscan, raster splitting, rupture, interlace, mid-line palette and mode splits, etc.
  • Video NuLA extended pallete ULA emulation.
  • Sideways RAM emulation.
  • Joystick emulation.
  • AMX Mouse emulation.
  • Screenshot functionality.

Website: github.com/stardot/b-em
Support: Forum
Developer: Steve Fosdick, David Banks, Thomas Adam
License: GNU General Public License v2

B-em

B-em is written in C. Learn C with our recommended free books and free tutorials.

Return to Home Computer Emulators Home Page


Popular series
Guide to LinuxNew to Linux? Read our Linux for Starters series. We start right at the basics and teach you everything you need to know to get started with Linux.
Free and Open Source SoftwareThe largest compilation of the best free and open source software in the universe. Each article is supplied with a legendary ratings chart helping you to make informed decisions.
ReviewsHundreds of in-depth reviews offering our unbiased and expert opinion on software. We offer helpful and impartial information.
Alternatives to Proprietary SoftwareReplace proprietary software with open source alternatives: Google, Microsoft, Apple, Adobe, IBM, Autodesk, Oracle, Atlassian, Corel, Cisco, Intuit, and SAS.
DockerGetting Started with Docker helps you master Docker, a set of platform as a service products that delivers software in packages called containers.
System ToolsEssential Linux system tools focuses on small, indispensable utilities, useful for system administrators as well as regular users.
ProductivityLinux utilities to maximise your productivity. Small, indispensable tools, useful for anyone running a Linux machine.
Home ComputersHome computers became commonplace in the 1980s. Emulate home computers including the Commodore 64, Amiga, Atari ST, ZX81, Amstrad CPC, and ZX Spectrum.
Now and ThenNow and Then examines how promising open source software fared over the years. It can be a bumpy ride.
Linux at HomeLinux at Home looks at a range of home activities where Linux can play its part, making the most of our time at home, keeping active and engaged.
Linux CandyLinux Candy reveals the lighter side of Linux. Have some fun and escape from the daily drudgery.
Android AppsBest Free Android Apps. We showcase free Android apps that are definitely worth downloading. There's a strict eligibility criteria for inclusion in this series.
Programming BooksThese best free books accelerate your learning of every programming language. Learn a new language today!
Programming TutorialsThese free tutorials offer the perfect tonic to our free programming books series.
Stars and StripesStars and Stripes is an occasional series looking at the impact of Linux in the USA.
Share this article

Share your Thoughts

This site uses Akismet to reduce spam. Learn how your comment data is processed.