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Posts: 3,841 | Thanked: 1,079 times | Joined on Nov 2006
#10
Originally Posted by lardman View Post
Rubbish, the PowerVR will quite happily support our screen resolution. In fact I was talking to a Nokian at LinuxTag who had been using it on the N8x0. It uses a shared SDRAM frame buffer afaik, so the frame size is not limited. It does use internal memory for some things (like a Z-buffer, tile buffer), at least that's what it says in the few docs which are available, so this will set some limit to the number of items on the display. Not related to the screen/frame size though.[...]
It's possible that the PowerVR chip could be utilized somehow, but the reason the external Epson LCD controller is used for the display still seems to be that in practice the built-in controller of the OMAP chip isn't up for more than 640x480.. from http://focus.ti.com/pdfs/wtbu/TI_omap2420.pdf page four: "5 Mbit internal SRAM supporting a VGA display". (It also says other interesting things as "Video out supporting an external TV display" btw...)

There's a nice picture and description in this link btw: http://focus.ti.com/general/docs/wtb...contentId=4671
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