4 / 11-06-2020






A7800 is a fork of the MAME Atari 7800 driver, with several enhancements added.

  • Support for emulation of Proline Joysticks, VCS Joysticks, Lightguns, Paddles, Driving Controllers, Keypads, Trak-Balls, Amiga Mice, and ST Mice.

  • Maria DMA timing has been improved further, with the addition of accurate DMA hole penalties.

  • Improved saturated/normalized colors with palette selection.

  • Streamlined UI including menu options to have an Atari 7800 system focus.

  • A bug in the existing RIOT emulation has been fixed.

MAME compatibility and syntax has been maintained, to allow for the reuse of MAME configuration files and front-ends.


Windows: 32-bit+

Linux: 64-bit binary

Mac: 64-bit binary

Note: You need to find Atari 7800 BIOS. Not necessary, but you might also want to obtain the Hi-Score Cart BIOS image.

Most Recent Changes

  • Implementation of XM control registers updated.

  • SALLY (CPU) and MARIA (Graphics chip) performance adjustments.

  • Additional display options and enhancements.

  • Audio indication of no ROM loaded silenced.

  • corrected ST and Amiga mouse button behavior.

  • 7800 bios files made optional. (with warning when absent)

  • minor POKEY audio emulation improvements.

  • framerate update to 50Hz/60Hz.

On their next update, this section will be refreshed.