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Horizon emulates the Acorn BBC Micro (Model B) with 32K RAM. B+ and Master models are not supported.

You also need to install Microsoft Visual C++ 2010 Redistributable Package for the Windows version.

Horizon 2.0 is a BBC Micro Emulator and is a major rewrite of the old version 1.x. It features better emulation with disk drive (Acorn DFS) and tape support, joysticks, improved sound with speech/sample playback, sideways RAM and full screen display. Diagnostic and trace tools are also included.

Version 2.x features include...

  • BBC Micro (Model B) emulator with disk drive & tape systems
  • Full screen display with options to change aspect ratio & overscan
  • 8271 disk controller emulation, 2 disk drives, compatible with Acorn DFS, Watford DFS and E00 DFS
  • ACIA low-level tape emulation, providing access to individual files
  • Sound chip emulation plays samples and speech
  • Joystick support for up to 2 PC USB joysticks, with key mapping option
  • Sideways RAM for Exile, E00 DFS, etc.
  • All 16 ROM sockets configurable for ROM or sideways RAM
  • Numerous diagnostic and trace tools for viewing internal chip states and tracing 6502 execution


Horizon 2.0 - BBC Micro Emulator