simple book on laptop

[Jim Gettys]

On a memory limited system, loading all images into the system is
guaranteed to lose, the only question is when.  We really don't want to
page, and you can trivially fill memory.  Memory is a precious resource.

At most prefetching a page on either direction of the current page for
fast response is in order.

In any case, testing on 239 is in order; there were bugs in the xrandr
(rotation) implementation that went.

On Tue, 2007-01-23 at 18:23 -0800, Dan Aronson wrote:
> Mitch Bradley wrote:
> > I tried it on both B1 and preB2.  It works on B1, but on pre-B2, the 
> > page (olpc/olpc_book.html) spent several minutes trying to load, then 
> > X crashed and restarted (this happened 3 times).  The B1 is running OS 
> > build 231, while the pre-B2 has OS 236, so I'm not sure whether it is 
> > the hardware or the software that is causing the difference.
> Its pretty generic javascript.  I'm happy to take a look at any logging 
> stuff and see if I can figure out what's going on.  It does load all the 
> images into memory.  Could you do a top and see what's happening to the 
> memory.  If that is the problem then maybe there needs to be some memory 
> limit set on the apps.
> 
> --dan
> >
> >
> > Jim Gettys wrote:
> >> Cool!
> >>
> >> Please add a bug to trac about rotating the direction keys; we didn't
> >> have time to worry about that, but it really needs to get done.
> >>                                   Thanks,
> >>                                        - Jim
> >>
> >>
> >> On Tue, 2007-01-23 at 16:18 -0800, Brewster Kahle wrote:
> >>  
> >>> For a talk at the Commonwealth Club in SF on the future of the book, 
> >>> Dan Aronson made a book display for the laptop in tablet mode. We 
> >>> passed it around and a room of people flipped pages on this cool 
> >>> book on this nifty laptop.
> >>>
> >>> If you have a B1 OLPC and want to do this, then go to book: 
> >>> http://www.archive.org/details/owlandpussycat00leariala
> >>>
> >>> and read the review that has the way to configure the keycodes so 
> >>> that the direction pad on the tablet map into direction keys and if 
> >>> flips the pages.
> >>>
> >>> then click on the HTML link on the left hand side.
> >>>
> >>> It looks really good.  The 200 dpi screen is very nice even on 
> >>> scanned pages.
> >>>
> >>> Go open books, go open laptop.
> >>>
> >>> yippie!
> >>>
> >>> -brewster
> >>>
> >>> PS.  next we have to make something real work, but it is nice to see 
> >>> simple demos work.
> >>>
> >>>
> >>>
> >>> _______________________________________________
> >>> Devel mailing list
> >>> Devel at laptop.org
> >>> http://mailman.laptop.org/mailman/listinfo/devel
> >>>     
> > _______________________________________________
> > Devel mailing list
> > Devel at laptop.org
> > http://mailman.laptop.org/mailman/listinfo/devel
> >
> 
-- 
Jim Gettys
One Laptop Per Child