BigPEmu vs Test7800

BigPEmu is an Atari Jaguar emulator for Windows, Linux, iOS and macOS. Its maker says it can run every game in the Jaguar retail library, and that default settings run the library at full speed on almost any x64-capable processor. Jaguar CD support covers the retail disc library, Memory Track and VLM, with a virtual disc system and audio loopback option. Players can save states and record deterministic movies from controller inputs. Visual options include customizable postprocessing shaders, native HDR and per-game profiles, alongside fast-forward and rewind. Input support covers analog, driving and rotary controllers, Team Tap and other devices recognized by the host system. Network features support JagLink games and synchronized states for two to eight players. Scripting includes tasks such as breakpoints and memory access. The desktop download is a zip archive that runs without installation and has an in-app update option. The maker notes that imperfect timing can make some software run too fast at default settings.

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.