Atari 2600 Java Download
Atari 2600 Vanguard

Z64K is a pixel exact emulator of the Atari 2600, Commodore 64, Commodore 128, and VIC 20. Keyboard mapping is positional to match real c64/c128/vic 20 key positions and combinations so some keys will not match PC keyboard keys. The emulator is written in the Java programming language. You’ll need a current Java runtime environment. If yes, dive into this website and give AI a fight in Atari 2600 games: Q.bert, Video Pinball, Ms.Pacman, Space Invaders, and Montezuma's revenge. The AI best scores were taken from this Nature paper.

If you're old enough like me, you may well remember the Atari 2600, which was an 8-bit game console released in September 1977 by Atari, Inc. It had a fantastic list of games for it's time and one such game I fondly remember was California Games. I mean come on, who did not like the skateboarding or bike riding down the mountainside, such great fun. Well now you can relive those days with Javatari, which is a multiplayer Atari2600 emulator written in pure java. It looks very well made and there is also a two player option. However you will need the roms, which are searchable but we wont provide!
Make sure to read the instructions on the website for controls
WEBSITE

Keyboard shortcuts

ALT+O = Toggle output of VICIIe/VDC to main screen (C128 only)
ALT+2 = Toggle 2nd display ON/OFF (C128 only)
ALT+ENTER = Toggle Fullscreen mode
ALT+INSERT = Paste text from clipboard
ALT+DELETE = Copy screen text to clipboard
ALT+Q = Toggle capture mouse (C128 & C64)
ALT+R = Soft reset
CTRL+ALT+R = Hard reset
ALT+W = Toggle Warp mode

AdditionalC128 keys

F1=ESC
F2=TAB
F3=ALT
F4=CAPS LOCK
F5= HELP
F6=LINE FEED
F7=40/80 DISPLAY
F8=NO SCROLL

The following keymappings override the values in the keyboard configuration editor for the C128
F9 = F1/F2
F10= F3/F4
F11= F5/F6
F12=F7/F8

Other changes are:-
PC CAPS LOCK = C128 SHIFT LOCK
For emulated NUMPAD Joystick Num Lock needs to be OFF.
C128 NUMPAD keys works with Num Lock ON.

Update_signed.zip tv download.
There is an option to enable/disable extra c128 keys via settings>setup>Extended Keyboard keys in the latest downloadable version of the emulator. Default is enable extended keyboard keys in C128/CPM modes only.

The C128 Direction keys are mapped to PC cursor keys, and CRSR U/D and CRSR L/R mapped to PC NUMPAD / and * when Extended Keyboard keys enabled.

Version 1- http://www.z64k.com/resources/Z64K.jar

Strainius. Version 2 (in development) - http://www.z64k.com/resources/version2/Z64K.jar

6 December - Version 2 of Z64K only

Added load_labels (ll) and save_labels (sl) Machine Monitor commands.
Added add_label (al), clear_labels (cl), delete_label (dl), and show_labels (shl), Machine Monitor commands.
Added radix and registers Machine Monitor commands.
When 'Audio plugin to control the Game loop speed' not selected Game Loop sleep time is factors in audio buffer size. Improves stability of audio on lower end devices.
Re-enable separate thread for audio driver. 'Audio plugin to control the Game loop speed' off by default.

5 December - Version 2 of Z64K only

Option to use Audio plugin to control the Game loop speed. Available in Volume control. Lag will be determined by sound buffer size. On by default.
Multiple updates to Audio driver. Should be a lot more stable, especially on lower end systems.

30 November - Version 2 of Z64K only

Replaced monitor single step cycle 'r' command with 'cycle' and 'zc'. The command is now included in the machine monitor help (? cycle). r is currently disabled and is reserved for the register command.
Fixed bug when exiting machine monitor where last stepped instruction in debugger window would be over written.

29 November - Version 2 of Z64K only

Update Machine monitor output to correct valueswhen stepping through cycles or instructions in the open IO area.
Greatly improved speed and memory usage when executing a huge number of debugging cycles in machine monitor.
Fixed overflow bug that caused machine monitor to freeze if disassembling entire memory.

25 November - Version 2 of Z64K only

Updated VDC model to partly emulate behaviour of VDC register 27 value > 0 in multicolour bitmap as discussed here.

22 November - Version 2 of Z64K only

Included progress bar of filter setup when reSID is selected. Save the filter tables into the config folder for quicker setup of filtersnext time emulator is started with reSID enabled.
Added an option which isavailable in settings to use the WIP reSID engine. It is based very close to the current VICE reSIDemulation. Note: Emulator will freeze for a few seconds while the filters are being calculated when reSID is first selected.

18 October - Version 2 of Z64K only

Option to dump all ofPIA memory to a file.
Option to save General and Sound Settings

16 October - Version 2 of Z64K only

Option to disable sound chip.

15 October - Version 2 of Z64K only

Removed code that caused sound buffers to be dropped.

11 October - Version 2 of Z64K only

Option to disable multithreading screen rendering (General global settings)
Options to select rendering method and to disable software rendering. (General global settings)
Option to select exact 50/60hz mode for VICII (Model settings)
Numpad joystick recognises 0 as fire in addition to right CTRL.

27 July - Version 2 of Z64K only

add soundrate, soundbufsize and VICIIpalette commandline options

26 July - Version 2 of Z64K only

Include Atari 2600 select option keys in hot key help.
Add Game Select and Game Reset buttons into Atari 2600 toolbar.
update 856x versions of VICII behavior when switching from bitmap to text mode as seen in VICE test repository modesplit test program.

25 July - Version 2 of Z64K only

Atari 2600 drop and drag cartridge
Save machine model settings (c64 and c128 only)

16 July

* Include 8562 (NTSC) and 8565 (PAL) grey dot options of VICII for C64. Rename C128 VICIIe options to 8564 (NTSC) and 8566 (PAL). Removed 6567R56A (old NTSC) option for C128. *Version 2 of Z64K Only
Fixed IRQ timing for CBM drive 1571 . Timera.prg passes from the VICE test repository

12 July - Version 2 of Z64K only

C128 VICII uses correct RAM block when MMU RAM banks 2 & 3 are enabled.
Fixed fatal error when attempting to start stand alone SID player caused by 6 July update .

11 July - Version 2 of Z64K only

fixed ROM handling for VIC 20. Fixes NTSC mode and Custom ROMs.
fixed load address out of range when loading file with machine monitor.

7 July - Version 2 of Z64K only

Fixed bug with ROM configuration which caused a fatal error with C128 emulation if settings were opened before starting the emulation.

6 July- Version 2 of Z64K only

Fix timing of CPM cartridge when using C128 emulation.
Fix debugging output of CPM cartridge.
All screen attributes are immediately refreshed when the emulator is paused the same as when the emulation is running normally.
Debug mode of screen available when the machine monitor is active which shows progress of current frame being generated. A white dot shows current position of raster beam.

28 June

Support for the new format of HVSC songlengths.md5 with SID player

27 June - Version 2 of Z64K only

Fixed bug with C128 PIA where zero page and page 1 were not immediately updated when PIA RAM banks updated. piaglobe test program works without glitches now.

21 June - Version 2 of Z64K only

Some internationalization support. Available in Global settings > Language

20 June - Version 2 of Z64K only

Fixed play/pause button of SID Player to be able to start playing again after being paused.

10 June

Mirror 1541 VIA registers across entire range ($1800-$1bfff

Atari 2600 Java