This website is a gathering place for those who want to find out about the latest information on the 1090XLR project. And for those special developers who labor to bring the project to life

one out of a box

Main bits

General information on why.

Over the last few months I've been researching and mocking up a project that Atari started with the XL line of computers, but due to leadership changes and market conditions abandoned before it came to market. I'm sure you've heard about it. I'm calling my version of it a 1090XLR Expansion Box.


Aside from what all you can put in it, it helps reduce the cost of development and production of Atari mods that can be inserted, by removing the cost of enclosures, eliminating the difference in the interfaces between the XL and XE line of computers by using a standardized internal bus pinout, removing power limitations on mods, introducing a 2nd bus to allow microcomputer hardware and potentially opening up a bridge to more modern hardware for the Atari to use. I could go on, but I believe that this offers the best road to reducing the cost of most Atari computer mods in the future. Depending on the scope of the expansion box, it might also reduce the cost of Atari disk drive mods.


I believe I have the beginnings of a concrete product. But it can always be better. To that end I want to encourage the buy in of the Atari mod development gurus. To do that I am setting up this website to serve as a hub for discussion, and information sharing to further develop the prototype expansion box into a finished product. This website will also seek donations to get prototype expansion boxes into the hands of a select group of developers, such as flashjazzcat, tf_hh, gus assmman, mega_hz, drac030, Simius, foft, ctirad, candle, etc.