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> 128 Mb Memory Upgrade
post Apr 19 2005, 07:18 AM
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[crossposted to the C3000 forum]

Now I have a better understanding on hardware memory upgrades - good & bad news.

The bad news: the memory stick I opened was a 8 Mb TSOP40 (bad luck - it must be TSOP48 to be hardware compatible. Anyone feel likes opening his 128Mb memory stick and count memory chip pins to check if he/she's more lucky?)

The good news: with the chineese forum pics I could validate my ideas. See the following pics: the samsung chip is k9f2808u0c - google for that and you'll see the size matches the flash, and it is tsop48


Even better- noticed the empty spot below? You can solder a second tsop48 chip. However this may require additional hardware hacks + kernel changes to activate the 2nd bank.

My suggestion to anyone with good soldering skills and a C3000 : purchase a 128 Mb memory stick and (hopefully) find a 128 Mb nand chip inside. Transplant it to your Zaurus. It will be empty, so you will have to go to the diagnostic menu. Then restore a 128 Mb dump from a C1000 - voila, you know have a super 3000. The same should apply to any zaurus also using TSOP 48 chips.

The big question is - will it work (boot, etc.) ? Good question, so I investigated the boot loader from my 6000.


The bad news: I may or may not do with a tc58100 - the bootloader just doesn't know it. Ie - it may work, but I don't want to take risk (my soldering skills are not that good to risk my zaurus life twice)

The good news: A Toshiba TC58DVG02AFT or a Samsung K9K1G08U0M are recognised by the bootloader (the default chip is TC58512FT or K9F1208U0M on a 6000, ie a 64 Mb/512MB chip)

For a Sl6000, this would require 1) flashing the rescue kernel with a special kernel that will know the flash is a 128 Mb 2) doing a nandbackup, exploding the nandbackup, increasing its size to 128 Mb 3) doing the above mentionned hack, only with a Toshiba TC58DVG02AFT or a Samsung K9K1G08U0M 4) restoring the hacked nandbackup 5) booting in the rescue kernel to reformat the 2nd partition and install an identical 1st kernel

See http://www.externe.net/zaurus/flash/nandmap.jpg for kernel informations.

All this sounds like a cool hack. Now someone please find me the chips (call toshiba USA - http://www.toshiba.com/taec/ I'm in France :-) I'm ready to get a Cxxxx just for the hacking purpose :-)
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post Apr 22 2005, 02:37 AM
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hacking the bootloader is no easy game, especially if you don't know arm asm :-)

It may require some days of work. Trying the TH58100FT chip first and see whether nand restore works in what should be done. If it doesn't work, end of the game. If it does, I'll see the bootloader.
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Posts in this topic
guylhem   128 Mb Memory Upgrade   Apr 19 2005, 07:18 AM
adf   will give it a shot this week. One of my disks ...   Apr 19 2005, 07:37 AM
guylhem   512 MB means 64 Mb - that's what's used by...   Apr 19 2005, 08:07 AM
adf   have you looked at pricewatch.com? they have link...   Apr 19 2005, 08:11 AM
guylhem   I tried everything. If you can find them, I'm ...   Apr 19 2005, 10:47 AM
adf   The downside of being in AK. other than big whover...   Apr 19 2005, 12:12 PM
BarryW   QUOTE(adf @ Apr 19 2005, 11:12 AM)The downsid...   Apr 19 2005, 03:42 PM
BarryW   QUOTE(guylhem @ Apr 19 2005, 09:47 AM)I tried...   Apr 19 2005, 03:50 PM
guylhem   Sorry for your ipaq :-( Yes I'm talking about...   Apr 20 2005, 04:30 AM
gab74   i see TH58100FT is the same of TC58DVG02A1FT... so...   Apr 22 2005, 12:00 AM
guylhem   hacking the bootloader is no easy game, especially...   Apr 22 2005, 02:37 AM
technojunkie   Just a suggestion as I was contemplating a RAM upg...   Apr 26 2005, 08:31 AM
guylhem   If you're in the us toshiba sometimes offers s...   Apr 26 2005, 12:23 PM
craigtyson   Erm guys...... As an electronics engineer I have t...   Apr 26 2005, 12:57 PM
zipmaster   any news on this it sounds exciting. the only chip...   May 5 2005, 06:52 PM
guylhem   that's the #1 issue - getting the chips. Solde...   May 6 2005, 12:38 PM
bluedevils   and how many chips does $200 get you?   May 6 2005, 12:43 PM
adf   WARNING!! slightly off-topic Doesn anyone...   May 6 2005, 02:05 PM
albertr   Like I said on the other thread where you posted t...   May 6 2005, 04:14 PM
adf   er.... were you talking to me albert.r ? My quest...   May 6 2005, 05:12 PM
zipmaster   i just searched google for the chip number. there ...   May 6 2005, 08:52 PM
guylhem   albertr, sorry I dind't notice that. I'm i...   May 7 2005, 02:12 AM
speculatrix   any news on this?   Sep 9 2005, 04:55 AM
Da_Blitz   I had a 128MB flash disk with a chip that would ha...   Nov 15 2005, 03:42 PM
louigi600   I saw that someone actually attempted replacing th...   Mar 14 2007, 12:38 PM
HoloVector   QUOTE(louigi600 @ Mar 14 2007, 02:38 PM)I saw...   Mar 14 2007, 12:56 PM
barnarda   QUOTE That was Speculatrix and he bricked his firs...   Jan 28 2008, 02:37 AM
speculatrix   QUOTE(barnarda @ Jan 28 2008, 10:37 AM) B...   Jan 28 2008, 04:00 PM
speculatrix   QUOTE(louigi600 @ Mar 14 2007, 09:38 PM)I saw...   Mar 14 2007, 01:02 PM
ranma   FYI, I was just looking at a C3000 p2rom: The tab...   Jul 5 2009, 08:19 AM
speculatrix   QUOTE(ranma @ Jul 5 2009, 05:19 PM) FYI, ...   Jul 18 2009, 02:38 PM
the_oak   Dremel idea sounds feasible. Hope it works!   Jul 18 2009, 04:06 PM
the_oak   What's happened Spec? Did this work? Is your 6...   Aug 16 2009, 06:43 PM
speculatrix   I've not had time to try, and anyway, I've...   Aug 17 2009, 01:26 AM

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