Atarimania Forum

Emulator.Computer:

Atari800Win PLus (Windows), Atari800 (Amiga OS4), Altirra


Emulator.Peripherial:

APE/PRO-System (Windows), AtariSIO (Linux)


Tools.Cross-Development.Assembler:

XASM (Windows), DASM (Windows, Linux, MAC),
6502/6809/68HC11/Z-80/8085 macro assembler v1.7 (C source), ATASM (Windows, Linux), MADS (Windows)


Tools.Cross-Development.DisAssembler:

Dis6502 (Windows)


Tools.Cross-Development.Compiler:

CC65 (Windows, Linux, Irix, Solaris, BeOS, Amiga)


Tools.Cross-Development.Music:

Raster Music Tracker (Windows)


Tools.Cross-Development.Graphics:

Graph2Fnt (Windows), EnvisionPC (Windows, Linux)


Tools.Compression/File-Management:

diverse


Tutorials.BASIC:

Atari Basic - A Self-Teaching Guide, Atari Basic - XL Edition


Tutorials.Assembler:

Machine language for beginners, The Second Book Of Machine Language, DERE Atari, Assembly Language Programming for the Atari Computers


Tutorials.6502 Opcodes:

Dan B.'s 6502 Tech Page (has a nice 6502 simulator as well!),

Datasheets for the programming of the 65x processors: 6502, 65C02, 65802 and 65816 (PDF document)


Wiki:

AtariWiki

Emulator for Mac OS X:

Atari 800MacX
http://members.cox.net/atarimac/

Emulator for Mac OS 9:

Rainbow (also on OSX but not as good as Atari 800MacX)
http://www.chrislam.co.uk/rainbow.htm

6502 Compiler (also for Mac OS X):

http://www.cc65.org/

ASM Solution for Mac OS 9:

http://www.hinton.demon.co.uk/archive/macide.html

For all those who want to dive deeper into the secrets of the 400/800 computers I recommend (printed books):

Technical Reference Notes (contains Operating System User's Manual, Operating System Source Listing and Hardware Manual) by Atari,

The Atari BASIC SOURCE BOOK (a complete explanation of the inside workings of Atari BASIC, along with the original source code) by Compute! Books Publication.

Lots of the tools mentioned above have been updated recently. Another good reason to check these utilities out

New updates!

Links checked and updated!

Updated!

There's also a 6502 cross assember + peripheral simulator available from Krishna Software Inc. called MPDOS Pro. It works under Windows 3.x/95/98SE/2K/XP/Vista (32-bit)/Windows 7 (32-bit). The assembled code can directly be uploaded and executed on real Atari 8-bit computers instantly within the same MPDOS Pro GUI-based application using a parallel port -> SIO/joystick cable.