32-bit (x86), 64-bit (圆4), and ARM64 versions available.Īltirra is designed with emulation quality in mind, sometimes over speed and polish.Native Windows UI with theme support, per-monitor high DPI support, file associations, and DirectInput/XInput controllers.Powerful debugger with label decoding, source-level stepping, conditional breakpoints/tracepoints, watchpoints, execution history with loop/call/interrupt folding, and profiling.

Audio and video recording, cheat trainer, DOS disk explorer with drag-and-drop, and text mode copy/paste.

Flexible display with Direct3D/OpenGL acceleration, aspect ratio options, easy resizing, and artifacting support.

Accurate emulation of multiple disk drive types with options for accelerated disk loads, realistic disk timing, and drive sounds.

Emulation of over three decades of hardware expansions, including memory expansions, cartridge expansions, Parallel Bus Interface (PBI) devices, modems, and 65C02/65C816 accelerators.

Contains reimplemented versions of OS, BASIC, and handler ROMs to run 8-bit software with high compatibility without needing Atari ROMs.

Support for most popular 8-bit image file formats: ATR, ATX, ATZ, DCM, XFD, PRO, ARC, BAS, ROM, BIN, A52, CAS, SAP.

Best-in-class emulation accuracy of undocumented hardware behavior, including undocumented 6502 instructions, precise DMA timing, mid-screen register changes, hardware bugs, and cycle-precise timer IRQs.

Full, cycle-exact emulation of all documented hardware features.

All trademarks belong to their respective owners. Note: Neither the author nor the software on this page is affiliated with Atari, and there is no code or software from Atari included in the downloads. If you are struck by nostalgia too or have a desire to do some Atari development, perhaps it might be useful to you, too. It also serves as a modularity test for the VirtualDub code base, from which Altirra shares some components. This is the result.Īt this point, I've learned a lot more about the Atari and Altirra now emulates more than I ever had or did years ago, but I still work on it periodically. Over a decade later, I was struck by both nostalgia and ambition and started to write a new 8-bit Atari emulator from scratch. I had access to a number of 8-bit computers in my childhood, but my most favorite was the Atari 800, a 1.79MHz 6502-based computer with color graphics and a disk drive, and which as the predecessor to the Amiga, another favorite of mine. Altirra, an 8-bit Atari computer emulator

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