hi, ive got a cybook and opened it
but there are two soldering places for ram. and one is free. the ram that is placed there is called M12L128324A-7T my question is does it really have 128mb ram? and why is pdf-rendering so slow? ive made some photos i upload them later

It has 16MB of RAM, which is tiny by modern standards (even for ebook readers). As you have seen, there is room for another 16MB of RAM. See some of the attachments at OpenInkPot: Netronix EB-100 (http://openinkpot.org/wiki/NetronixEB100).

what does that mean? there is this ic build in http://www.esmt.com.tw/english/main_products.asp
M12L128324A-7T

128 Megabit, not Megabytes (Mb = Megabit, MB = MegaBytes, 1MB = 8Mb)

i would like to add some ram to my cybook, pdf is too slow
http://www.esmt.com.tw/english/main_products.asp
M12L128324A-7T is there built-in
and one place free
which ram am i able to use? which specs do it need
M12L128324A-7TG

4Mx32

SDRAM 3.3V

4K

143MHz

86L-TSOPII

Now

Now
some photos
http://www.getdropbox.com/gallery/520723/1/cybook?h=48d8cd

Are you shure you want to try that - it's almost impossible without the proper equipment and some experience - all the contacts have to be heated at the same time - without bricking the whole motherboard...

Those pictures look like smd soldering points to me. I'd strongly advise against soldering anything at all on the board- first, it's a nightmare to do, since, as Pulp already stated, all the contacts have to be heated simultaneously with an IC this large. And second, even if you did install it correctly, I wouldn't be surprised if the device just didn't use the extra memory- it could have some hardcoded memory boundaries (although that would be pretty stupid). Oh, and I forgot: You'd void your warranty, and considering the relative fragility of Eink screens, that can't be a Good Thing.

i would like to add some ram to my cybook, pdf is too slow


What evidence do you have that lack of RAM is affecting the speed of PDF display? I would have thought personally that the CPU speed was far more likely to be the dominant factor.

What evidence do you have that lack of RAM is affecting the speed of PDF display? I would have thought personally that the CPU speed was far more likely to be the dominant factor. Unless the device is configured with SWAP space and the PDF reader is paging (which I doubt), I agree that adding more memory isn't likely to help. This is because Bookeen must be using algorithms that have a small memory footprint. These probably are slower than memory hungry algorithms, but adding more memory won't change the way PDFs are processed.

PDFs render very slowly even on a high spec computer. They're a horrible format, it's no wonder that they aren't zippy on a portable device.

It has 16MB of RAM, which is tiny by modern standards (even for ebook readers). As you have seen, there is room for another 16MB of RAM.

Hasn't someone recently mentioned that the newest models have 400 MHz CPU and 32MB RAM?! I have one of these with build 834 and PDF support is awful - I tried one bigger document (approx. 2,5 MB with some illustrations) and thought the reader has frozen, but after some minutes (!) the first page was displayed... then I tried zooming... :smack:

I now convert all my documents to MOBI/PRC and stick to this format. :thumbsup: