Welcome to BupSystem

BupSystem is an Atari 7800 ProSystem emulator. It was originally written to assist in the development and distribution of Rikki & Vikki, but can run most other software for the platform.

As of writing BupSystem is closed source and only available for Microsoft Windows.

This program is intended as a development tool for and preservation of the ProSystem architecture. While it can be used to run commercial software I will neither assist nor prevent users from doing so. You are on your own.

More information can be found in the included help file.

Emulated Hardware
  • Sally, Maria (NTSC or PAL), TIA, RIOT, and the BIOS
  • Mappers : 16K, 32K, 48K, SUPER, SOUPER, ABSOLUTE, and ACTIVISION
  • Expansion Modules : XBoard
  • Cartridge Audio : Pokey, BupChip
  • YIQ Color Generation
  • One and Two Button Joysticks
  • Light Pens and Light Guns

Minimum Requirements
  • 1.2GHz Intel Pentium III
  • 256MB RAM
  • Microsoft Windows 95 + DirectX 7.0
  • DirectDraw or Direct3D Compatible Graphics Accelerator
  • DirectSound Compatible Audio Device

Current Version
BupSystem 2021-5-27 Added
  • Support for launching in Full Screen Mode.
  • More robust Atari 7800 File (*.a78) parser.
  • Upgraded to JoyFish v0.8.6.2.
  • Color Dialog didn't restore its previous settings when canceled.
  • Palette wasn't recalculated on a console region change.
  • Direct3D 9 display texture is now padded vertically, this corrects some filtering issues.
  • Restored the behavior of rendering whether or not a cartridge is loaded.
  • Using the menu in Full Screen Mode now shifts the display downward instead of resizing it.
  • Screen Saver and Monitor Power Down are now allowed while execution is paused.
  • Recent cartridges menu was broken in Windows 95.


All content by Osman D. Celimli unless otherwise noted.
Not all of said content guaranteed to be useful. Some is probably quite old and dumb.
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