Today, I needed a screen dump from u-boot, and I though I'd give the JTAG approach a try again. We experimented with this a long time ago on GTA01, but it never worked, so I didn't have much hope. Surprisingly, this worked in the first try on GTA02.
Here's how it's done: OpenOCD: > dump_image dump.scr 0x8800000 0x96000 Host: % cd svn.openmoko.org/developers/werner % ./scr2ppm.pl /where/ever/dump.scr >dump.ppm Note that the dumping only works like this if the frame buffer is identity-mapped. Under Linux, it ends up at a different address. Also, my GTA01v4 still doesn't like this way of doing screen dumps. (JTAG fails with "timeout waiting for SYSCOMP & DBGACK".) - Werner
