Créé par Avery Lee (l’auteur de VirtualDub), il s’agit d’un émulateur d’Atari 8 bits (800/800XL/130XE).

Version 1.6 [April 25, 2010]:
[features added]
– Debugger: Added profiler.
– Debugger: Added support for loading CA65 labels.
– Debugger: Added verifier to catch possible coding errors.
– Debugger: Added support to view extended memory to some commands and panes.
– UI: Added option for controlling vertical sync lock.
– UI: Added /opengl command line switch.
– UI: BASIC ROM is now noted on window caption.
– UI: Window position is saved on exit.
– UI: Added /debug switch to launch in debugger mode.
– UI: Added /f switch for full-screen mode.
– UI: Added .car extension to Open Image dialog.
– UI: Input maps can now be cloned.
– UI: Input maps can now be bound to a specific game controller index.
– UI: Create disk dialog now has entries for standard disk formats.
– UI: Added ability to paste text from clipboard.
– UI: Moved warm reset to F5, bound Help to F6 and Break to F7, and merged Run into F8 to match other emulators.
– UI: Added program icon.
– Simulator: Added option to fill memory with a psuedorandom pattern on cold boot instead of zeroes.
– Simulator: Added support for 65C816 high memory at banks $01-03.
– POKEY: Increased playback sampling rate to 44KHz.
– POKEY: Added option to toggle non-linear mixing.
– POKEY: Added option to toggle individual sound channels.
– POKEY: Implemented keyboard overrun bit.
– VBXE: Register window can now be switched between $D6xx and $D7xx.
– Disk: Added support for 1050 drive dual density format.
– Disk: Added support for XF551 drive high speed commands.
– GTIA: Added a stronger level of NTSC artifact emulation.

[bugs fixed]
– Fixed command line parsing and added several new switches.
– HLE: Fixed math pack issues preventing Atari Basic ATN(), INT(), and SQR() from working.
– HLE: Fixed handling of BASIC enable/disable on warm reset.
– LLE: Improved math pack implementation.
– ANTIC: Playfield DMA wasn’t properly shut off on cold reset.
– ANTIC: Improved emulation of mid scan line DMACTL changes.
– ANTIC: Reset line now resets position counters.
– ANTIC: Emulated single cycle glitch in VCOUNT at the end of a frame.
– ANTIC: Implemented delay for changes to CHBASE to take effect.
– POKEY: Adjusted timing of STIMER and timer rollovers.
– POKEY: Retuned filters and non-linear mixing curve.
– POKEY: Fixed behavior of SKSTAT serial overrun bit.
– GTIA: Added option for displaying full PAL height when extending display past scan line 239.
– GTIA: Fixed display of beam position when single stepping with VBXE enabled.
– Debugger: Fixed bug where history window didn’t allow scrolling to the bottom via the slider.
– Debugger: History window now always shows last executed instruction.
– Debugger: History window now flushes and rebuilds the tree when the history window rolls over.
– Debugger: « Toggle read/write breakpoint » in the memory window was using the wrong address.
– Debugger: Disassembly window now tracks 65C816 M/X/E state.
– Debugger: .history command was using wrong register state for decoding indexed effective addresses.
– Debugger: Fixed incorrect index register values in Registers pane in 65C816 emulation mode.
– Debugger: Fixed disassembly of JMP (abs,X) and JSR (abs,X) instructions.
– CPU: XCE instruction no longer sets M/X bits when staying in native mode.
– CPU: Fixed bank used by JML, JMP (abs), and JMP (abs,X) instructions in 65C816 mode.
– Disk: Added support for reading broken DD disks that have full 256 byte boot sectors.
– Disk: SIO acceleration hook now sets SKCTL correctly.
– UI: Fixed issue where full-screen mode didn’t always cover the entire screen.
– Simulator: Shortened delay to releasing OPTION on startup.

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