Altirra vs kat5200

Altirra is a Windows emulator for 8-bit Atari computers, covering the Atari 400/800, 1200XL, 600/800XL, 130XE, XEGS and 5200. It provides cycle-exact handling of documented hardware and models undocumented behavior, including DMA timing and undocumented 6502 instructions. Supported files include ATR, ATX, ATZ, DCM, XFD, PRO, ARC, BAS, ROM, BIN, A52, CAS and SAP. Reimplemented operating-system, BASIC and handler ROMs are included, while real Atari ROM images can be supplied for compatibility. The emulator models memory and cartridge expansions, PBI devices, modems and 65C02/65C816 accelerators. Disk options include accelerated loading, realistic timing, sounds and drive CPU emulation. Its debugger offers source stepping, breakpoints, watchpoints, history and profiling. Recording, a cheat trainer, disk browsing and text copy/paste are also included. Altirra is free under GPL version 2 for Windows 7 or later.

kat5200 is a free emulator for playing games from Atari 5200 and Atari 8-bit computer systems on a personal computer. It supports Atari 5200, Atari 400, Atari 800, Atari 800 XL and Atari 800 XE systems, with builds listed for Windows, macOS, Linux and Android. The emulator does not include game ROM images or BIOS files, so users must obtain and configure them separately. Controls can use a game controller, keyboard or mouse, and multiple input entries can be assigned to an emulated function. Users can save different input profiles and assign them to games in the Launcher. The Simulate Analog option can help when a game expects controller-axis positions but the player uses a keyboard or digital controller. Initial setup offers ROM-directory scanning and options for trackball, paddle and two-stick games. Version 1.0.0 uses TOML configuration and adds per-ROM profiles. The Android version is provided as an APK, not through the Play Store, and must be sideloaded.