It's possible to do the dumping with the "udump" method, right?
http://chdk.setepontos.com/index.php/topic,922.msg7711.html#msg7711
Yes current universal dumpers should work smoothly for a570. That post in your link is rather old, but for a570 it should be fine since it's one of the old'n'easy models... but I haven't really been following dumper development that much.
BTW, there really might be something wrong with the current 101a dump, cause i've always had problems with the zebra feature (it doesn't work in some modes etc).
There is one difference between 101a and 100e zebras... 101a doesn't have function vid_get_viewport_live_fb() implemented in platform/a570/sub/101a/lib.c (compare to 100e/lib.c and you'll see). 101a and 100e are very alike so you if you're feeling brave you could probably try to take that function from 100e and try it out (the main effect is that it speeds up motion detection reaction time but it also affects zebra in core/gui_osd.c) or look at that address in the debug memory browser of CHDK first if in doubt...
But actually I just remembered one thing about zebra on my a570 100e: I never use the default overexposure threshold (I think it's 1 but I may be wrong). Instead I use 2, because otherwise I got some spurious overexp markers (or even vice-versa, I can't remember any more) in some scenes. Never cared enough to dig deeper, but I guess I should tweak the default and hope nobody notices
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But this zebra thing is out of topic, if you feel like experimenting with it further or need help, please open a new thread with a link here (it would be good to get that live buffer speedup verified and in trunk for 101a too... you can search for a certain lengthy MD speedup thread on these forums for the details I've forgotten all about).
