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.
- 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.
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