A7800 vs Íris Emulator

A7800 is a free, open-source Atari 7800 emulator and a fork of the MAME Atari 7800 driver. It runs on Android, Linux, macOS, and Windows; version 5.2 lists 64-bit x64 builds for Linux, macOS, and Windows. The emulator supports Proline and VCS joysticks, lightguns, paddles, driving controllers, keypads, Trak-Balls, Amiga mice, and ST mice. Its listed technical work includes improved MARIA DMA timing with accurate DMA-hole penalties, a RIOT emulation fix, POKEY sound changes, and SALLY and MARIA performance adjustments. Users can choose palettes and enhanced screen options. BIOS files are optional and not required. A7800 keeps MAME compatibility and syntax, allowing reuse of MAME configuration files and front ends. Developer targets can display DMA usage per scanline. The repository is offered under GNU GPL version 2 or later, and the license provides no warranty. The project labels v5.2 as its latest release, including corrections to the POKEY poly9 sequence and initial state.

Íris Emulator is a free, open-source emulator for Atari 2600, Atari Lynx, and Atari Jaguar games on 64-bit Windows 10 or 11. The Atari 2600 core emulates the 6507 CPU and TIA, with NTSC, PAL, and SECAM support and several cartridge mappers. Lynx emulation covers the 65C02, Mikey, and Suzy, with LNX cartridges, HLE boot for homebrew, and optional user-supplied boot ROM support for commercial games. Jaguar support includes .j64 and .jag cartridges, RF Cable and S-Video filters, upscaling to 1080p, and Auto, 4:3, or 16:9 display ratios. The interface offers cover-art browsing, a first-launch wizard, fullscreen mode, remappable keyboard and gamepad controls, and ten save-state slots. VST3 audio processing uses a reorderable chain and master gain. Optional Discord Rich Presence requires the Discord desktop app. ROMs and BIOS files are not included.