I don't know, but I have problem to find RAM while we have some 256MB DOM.
Now I've rebuilt everything with such a DOM. I have not understood why, but I have more free memory.
I've installed input-2.6.29.1-tinycore and Xorg-7.4 manually (before input-2.6.29.1-tinycore was installed on boot).
I have enough memory for run Xorg -retro (manually, not with startx), flwm_topside, wbar and setting a little image as background.
Then I've seen I have more than 40MB of free RAM, so I've installed xvkbd and qt-3.3.8b, because my software need that library. I am now able to test my software with touchscreen
Ok, When I poweroff the machine every go away, but I now know it can work. I'll make it working automatically.
Thank you for your support.
Do you know why I have so many more free memory changing only the DOM?