A7800 - the Atari 7800 Emulator

What is A7800?

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.
• A bug in the existing RIOT emulation has been fixed.
• POKEY sound emulation improvements.
• SALLY (CPU) and MARIA (Graphics chip) performance adjustments.
• Selectable and improved palettes with enhanced screen options.
• Audio indication of no ROM loaded silenced.
• BIOS file(s) no longer required and made optional.
• Streamlined UI including menu options to have an Atari 7800 system focus.
• Implementation of XM control registers updated.
• Graphical register updates made mid-scanline are now displayed mid-scanline.
• Bankset bankswitching support added.
• POKEY@800 added for non-banked, supergame, and bankset formats.
• Machine targets a7800dev and a7800pdev added, which display DMA usage per-scanline.

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