There are two ways of installing WUDSN IDE. If you are using a Windows operating system, I recommend downloading the ready to run zero installation distribution:

Click to download the Windows 64-bit version

It contains the Eclipse Platform, the Java Runtime Environment, the latest stable version of the WUDSN IDE plugin, all supported compilers and an emulator for each supported platform. All paths to folders, compilers and emulators are pre-configured. Unpack the content of this archive to the directory "C:\jac\wudsn" and click the "WUDSN IDE" link. Eclipse will open with the predefined workspace that contains "Hello World" examples for different platforms.

If you use another operating system, or want to use the latest version of WUDSN or want to install compilers and emulators more selectively, read the descriptions of the installation steps below. In addition, the following previous versions of the zero installation distribution are available

WUDSN IDE 1.7.0: Windows 64-bit version, Windows 32-bit version
WUDSN IDE 1.6.6: Windows 64-bit version, Windows 32-bit version

In case something is not correct or not working, please contact me.

Installing Eclipse
Installing WUDSN IDE
Installing compilers like ATASM, MADS, XASM...
Installing Atari800Win and other emulators
Creating and compiling an example project
Further information on assembler programming

Installing Eclipse » top

Download Eclipse from http://www.eclipse.org/downloads .
If you don't know which version to take, use Eclipse 4.3.2 Platform Runtime Binary (61 MB) .
This is a minimum size installation which does not include the Java Development Toolkit (JDT). WUDSN IDE has no dependency to the JDT but of course to the Java Runtime Environment (JRE). Make sure you also have the 64-bit version of the JRE installed if you want to use the 64-bit version of Eclipse.
Unzip the downloaded archive file and store the contained folder "eclipse" where you want Eclipse to be located on you local hard drive.
Start the Eclipse executable from that folder.
Upon the first start you are prompted to specify the folder where the workspace shall be located.
Normally a start link a created to this end. You can use the parameter "-nl" to specify the locale if you want. Use "en_US" for English or "de_DE" for German. Example: "C:\Program Files\Eclipse\4.3.1\eclipse\eclipse.exe" -Xmx512M -nl en_US"
It is recommended to create the workspace folder in your home directory.
After you have read the welcome page and got familiar with the Eclipse UI, just switch to the Resource perspective.
Open the view "Problems" via the menu "Window/Show View/Problems" and then click the entry "Configure Contents..." from its view menu.
Select the configuration "All Errors", the radio button "On selected element and its children" and the check boxes ""Error", "Warning" and "Info".
Now Eclipse itself is ready and you can proceed with step Installing WUDSN IDE .

Installing WUDSN IDE » top

Start Eclipse
Select the entry "Install New Software..." from the menu "Help".
Enter "http://www.wudsn.com/update" in the "Work with" field and press ENTER.
Select the latest version of the feature "WUDSN IDE" for in and press the button "Next".
You don't need to install the "General Eclipse Enhancements" feature as it is already included in the "WUDSN IDE" feature".
Review the installation details and press the button "Next".
Read the license agreement, choose the option "I accept..." and press the button "Finish".
In case you get a security warning that the content is unsigned, confirm the warning by pressing the button "OK".
When you are prompted to restart Eclipse now, press the button "Yes".
As always with updates, it may happen that the update fails for whatever reason or the installed version turns out to have severe issues. For example the required Java Version might not be available on your machine. In this case you can uninstall it via the link "What is already installed" in the "Install New Software..." dialog and restart the IDE. Then you can reinstall the latest version from "http://www.wudsn.com/update" or previously released versions from the locations listed in the "Releases" chapter.

Installing compilers like ATASM, MADS, XASM... » top

Start Eclipse
Select the entry "Preferences" from the menu "Window" (in Windows and Linux) or the menu "Eclipse" (in Mac OS X)
Open the preferences page "Assembler/Atari 8-bit Compilers" or the respective page for your platform.

Select the tab for the compiler of your choice.
The following compilers are or will be supported:

Compiler	Default Target Platform
ACME	C64
ASM6	NES
ATASM	Atari 8-bit
DASM	Atari 2600
KickAss	C64
MADS	Atari 8-bit
XASM	Atari 8-bit
TASS	C64 (in preparation)

Click the "Download"" link to open the home page of the compiler.
Follow the instruction on the download site for install the compiler to the folder of your choice.

Alternatively, you can download the single archive containing all supported 6502 compilers including the Linux and Mac OS X versions where available. The archive contains a readme file with the date of the last update and the included compiler versions.

Compiler	Operating System	Architecture	Compiler Version	Executable Path	Compile Date	Compiled By
ACME	Windows	Intel - 32 bit	0.90	ACME / acme.exe	2006-03-19	Krzysztof Dabrowski
ASM6	Windows	Intel - 32 bit	1.6	ASM6 / asm6.exe	2011-03-11	loopy
ATASM	Windows	Intel - 32 bit	1.07 (non-final)	ATASM / atasm.exe	2010-05-10	M. Schmelzenbach
ATASM	Mac OS X	Intel	1.07 (non-final)	ATASM / atasm.macosx-i386	2015-05-01	JAC!
ATASM	Mac OS X	PowerPC	1.07 (non-final)	ATASM / atasm.macosx-powerpc	2015-05-01	JAC!
ATASM	Linux	Intel - 32 bit	1.07 (non-final)	ATASM / atasm.linux-i386	2015-05-01	JAC!
ATASM	Linux	Intel - 64 bit	1.07 (non-final)	ATASM / atasm.linux-x86-64	2015-05-01	JAC!
DASM	Windows	Intel - 32 bit	2.20.11	DASM / bin / dasm.exe	2015-05-08	JAC!
DASM	Mac OS X	Intel	2.20.11	DASM / bin / dasm.macosx-i386	2015-05-01	JAC!
DASM	Mac OS X	PowerPC	2.20.11	DASM / bin / dasm.macosx-powerpc	2015-05-01	JAC!
DASM	Linux	Intel 32-bit	2.20.11-20140304	DASM / bin / dasm.linux-i386	2015-05-01	JAC!
DASM	Linux	Intel 64-bit	2.20.11-20140304	DASM / bin / dasm.linux-x86-64	2015-05-01	JAC!
KickAss	All	Java	V3.39	KICKASS / KickAss.jar	2015-03-26	Mads Nielsen
MADS	Windows	Intel - 32 bit	2.0.7 (new features since 1.9.0 are not fully supported in WUDSN IDE yet)	MADS / mads.exe	2014-05-20	JAC!
MADS	Mac OS X	Intel	2.0.7 (new features since 1.9.0 are not fully supported in WUDSN IDE yet)	MADS / mads.macosx-i386	2017-11-05	JAC!
MADS	Mac OS X	PowerPC	2.0.7 (new features since 1.9.0 are not fully supported in WUDSN IDE yet)	MADS / mads.macosx-powerpc	2017-11-05	JAC!
MADS	Linux	Intel - 32 bit	2.0.7 (new features since 1.9.0 are not fully supported in WUDSN IDE yet)	MADS / mads.linux-i386	2017-11-05	JAC!
TASS	Windows	Intel - 32 bit	1.46 r38	TASS / 64tass.exe	2011-07-03	Soci
XASM	Windows	Intel - 32 bit	3.1.0	XASM / xasm.exe	2014-07-20	0xF
XASM	Linux	Intel - 32 bit	3.1.0	XASM / xasm.linux-i386	2014-07-20	0xF
XASM	Mac OS X	Intel - 32 bit	3.1.0	XASM / xasm.macosx-i386	2014-07-20	0xF

In the section "Browse..." button for the field "Path to Compiler" to locate the executable. Note that under Mac OS-X, you must specify the path to the actual executable inside the ".app" folder.
If not explicit compiler parameters are specified, the default parameters are used.
If explicit compiler parameters are specified, the default parameters are ignored.
The variable "${sourceFilePath}" is replaced by the absolute path to the source file.
The variable "${outputFilePath}" is replaced by the absolute path to the output file.
For more variables see section preferences for compiling.
Choose if you want to use the source folder or the temporary folder as output folder.
Choose the file extension for the output file, for example ".xex" or ".bin"
Press the button "OK".
Using the button "Restore Defaults" all values are reset, except for the paths to the compilers.
Using the button "Default" in the "File Associations" preferences you can set the default editor for a file extension, for example "MADS" for "*.asm".

Installing Atari800Win and other emulators » top

Start Eclipse.
Select the entry "Preferences" from the menu "Window" (for Windows and Linux) or "Eclipse" (for Mac OS X).
Open the preferences page "Assembler/Atari 8-bit Compilers" and select to tab for your compiler.
The field "Default Application to open Output File" is defaulted to "Operating Sytstem Default Application".
- If you have the emulator registered as default application for the extension of the output file, for example "Atari800Win" or "Atari800MacX" for ".xex", you don't need to configure anything in addition and can skip the steps below.
- If your operating system, like for example Linux, does not support default applications or if you need a special output file extension and special parameters to open the output file in the emulator you can choose the emulator in the field "Application to open Output File" and configure the command line on the corresponding tab.
- You can also use the "User Defined Application" for open the output file with and arbitrary application like a script, linker or whatever.
If you have not yet downloaded the corresponding emulator, you can use the download link on the tab of the emulator and follow the instruction on the download site for install the emulator
Use the "Browse..." button for the field "Path to Application" to locate the executable. If required you can specify your own command line based on the default command line displayed. Note that under Mac OS-X, you must specify the path to the actual executable inside the ".app" folder.
If not explicit command line is specified, the default command line is used.
If an explicit command line is specified, the default command line is ignored.
The variable "${runnerExecutablePath}" is replaced by the path to the application executable.
The variable "${outputFilePath}" is replaced by the absolute path to the output file.
For more variables see section preferences for compiling.
Press the button "OK"
In case you also need the Atari ROM files, you can find them in the file PCXF380.ZIP which is available at http://www.emulators.com
The patch to convert the English version into a German version including a German keyboard layout is available from ABBUC . It also contains the ROM files

Creating and compiling an example project » top

Start Eclipse.
Select the entry "New/Project" from the menu "File".
Select the wizard "General/Project" and press the button "Next".
Enter the project name "Atari800" and press the button "Finish".
The new project will appear in the "Project Explorer".
Select the newly created project and open its context menu.
Select the entry "New/File", enter the file name "Example.asm" and press the button "Finish".
The new empty file will now be opened in the MADS editor.
Copy the following source text and paste it into the file:

; WUDSN IDE Atari Rainbow Example - MADS syntax

      org $4000 ;Start of code

start lda #0 ;Disable screen DMA
      sta 559
loop  lda $d40b ;Load VCOUNT
      clc
      adc 20 ;Add counter
      sta $d40a
      sta $d01a ;Change background color
      jmp loop

      run start ;Define run address
Select the entry "Compile and run" from the menu "Assembler" or press "SHIFT-CTRL-0".
Enjoy your famous first rainbow effect.
In case of problems, open the view "Problems" and the output of the view "Console" for details and post a message with the screenshots in the English AtariAge forum if you get stuck:

Further information on assembler programming » top

Source includes with equates for hardware registers and operating system for Atari 8-bit and Atari VCS in MADS format.
Atari Graphics & Arcade Game Design , DeRe Atari , and Mapping the Atari at AtariArchives.org
AtariAge forum for Atari 5200 / 8-bit Programming