A7800 vs Holani

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.

Holani is a free, open-source Atari Lynx emulator for Linux and Windows, released under GPL-3.0. Its cycle-stepped 65C02S emulation began from the design idea of chips’ 6502. The project can also operate as a library for other frontends and links to a libretro core for official games and homebrews. Holani-retro works with libretro frontends such as RetroArch, providing save and load states plus RetroArch cheats. Holani-gtk is a GTK4 frontend for loading cartridges and overriding ROMs. Holani-min provides a command-line interface with button mapping, display filtering, mute, and Comlynx options; multiple instances can connect through Comlynx. The project also lists holani-debug, an Atari Lynx debugger. Holani embeds the Free Lynx Boot ROM and BLL uLoader blobs, so no BIOS is required. GTK builds require Rust, Cargo, and GTK4; Windows libretro use requires the Microsoft Visual C++ 2015 Redistributable.