As far as i know, is the same specs from the 130xe but the ram.
The stereo upgrade works like a charm on 800xl, i know it because i've seen some machines working perfectly with it.
But, there are some demos/trackers that don't work on my atari 800xl (NUMEN runs on 320 KB xD) , 'cause they will run out of ram, specially polish demoscene ones, which are specially programmed for the 128KB or even more. 130XE is about the same as the 65XE but with more RAM, and this last have some differents specs on the cartridge input and design with the 800XL, as far as i can recall. Please feel free to correct me.
There's a little chilean scene, more specialized on hardware modding than anything else, and some guy made a RAM upgrade on the 800xl:
please read the link for more information: (in spanish)
http://www.retrogames.cl/ampliacion.html
I can bet that the stereo mod works on the 65XE or 130XE, (Greyscale uses 130XE) i'll ask my atarian fellows.
If i can help you in other issues atari related, please let me know.
cheers!
Last edited by Analog (May 4, 2010 2:29 am)