Atari 5200DS vs Test7800

Atari 5200DS is a free emulator for Atari 5200 games on Nintendo DS-family systems, including DS, DSi, DSi XL, and DSi LL. Its stated coverage includes the original 69 commercial releases and a couple hundred homebrews, hacks, and prototypes. Bankswitching cartridges up to 512K are supported, including Bounty Bob Strikes Back. Players can mark games as liked or loved, and the emulator saves up to 10 high scores per game to the SD card. Some controls are adjusted for particular games: Frogger and Q-Bert are patched for button movement, while Robotron can use ABXY to shoot and the d-pad to move. The emulator requires NTSC-compatible ROMs in a52/bin format and recommends the original 4-port 5200.rom BIOS for full compatibility. A built-in replacement BIOS works for some games with limited compatibility. The README says games run at full speed on DSi or newer systems, though complex conversions may lag on DS Lite or Phat. Quest for Quinta Roo will not start because of a known key debounce issue. Version 3.9 was released April 8, 2026.

Test7800 is an experimental Atari 7800 emulator for playing many available 7800 ROM files. It supports flat .a78 ROMs, several bankswitching SuperGame ROMs, and ELF cartridges with an embedded ARM chip. Its emulation includes 6502, TIA, RIOT, and ARM components taken from Gopher2600; the MARIA implementation is new to this project. POKEY and many of its layouts are supported. Players can use a keyboard or gamepad, with a mouse for paddle and trackball input. QuadTari mode supports up to four joystick players, with assignments configurable through -players. An optional overlay displays MARIA state, and the -tv option selects PAL instead of the default NTSC BIOS. Test7800 is available for Linux, macOS, the web, and Windows, and is published under GPL-3.0. The project describes itself as incomplete: important features are missing, and some conglomerate cartridge hardware configurations are not emulated. Its basic command-line debugger lacks many features, and performance was not a design focus. Occasional nightly builds are distributed as prereleases.