 Sl-7500c 128m Flash Upgrade Failed!, Is there still hope? |
  Sep 18 2006, 07:05 PM
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#1
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Group: Members Posts: 114 Joined: 12-May 06 Member No.: 9,848  |
Last week I opened my Zaurus SL-7500C and replaced the Flash chip with a K9F1G08UOM. (My original chip is also K9F... the only difference is the capacity).
I carefully checked the pins to make sure they are properly connected. Then I booted to the Service Menu using Fn+D+M. The up-right corner of Sevice Menu shows "SL-C760". But the chip wasn't properly recognized. Clicking on the version list gave me the following information: CPU: PXA255 A0 Board: c760 Serial No: 00000b0d ROM Checksum: bca1 RAM Size: 65536KB NAND modules(0MB) unknown[unknown] I tried all the NAND Flash related command (NAND restore and NAND Full Erase) in the service menu and they all gave me an "Error -2". Restoring NAND backup or installing U-Boot didn't work either. I can't put back my original chip because I damaged it when I removed it. (There must be some glue under the chip.) So basically my 7500 is dead. I heard that somebody has successfully upgraded their Flash chip. So maybe he can share his experience with me. I'd be very appreciated. |
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Sep 23 2006, 08:04 AM
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Group: Members Posts: 369 Joined: 6-September 04 From: Brisbane, Australia Member No.: 4,488 |
From the datasheets, the K9F1208UOM ID is 76C0, but the K9F1G08UOM's is F115 - the Z would be querying the ID and giving up on the unfamiliar one, even if the chips are functionally identical.
The only real way to get it to work in that case would be to cram in a microcontroller to intercept the new ID and inject the old one in a similar fashion as a console modchip does. It might also be possible to patch the in-flash version of the firmware to replace the ID with the newer one - though if that worked you couldn't use the Fn+D+M menu (as it's in ROM) to save you from a bad subsequent flashing... |
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Sep 23 2006, 04:36 PM
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#3
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Group: Members Posts: 114 Joined: 12-May 06 Member No.: 9,848 |
QUOTE(pelrun @ Sep 23 2006, 08:04 AM) From the datasheets, the K9F1208UOM ID is 76C0, but the K9F1G08UOM's is F115 - the Z would be querying the ID and giving up on the unfamiliar one, even if the chips are functionally identical. The only real way to get it to work in that case would be to cram in a microcontroller to intercept the new ID and inject the old one in a similar fashion as a console modchip does. It might also be possible to patch the in-flash version of the firmware to replace the ID with the newer one - though if that worked you couldn't use the Fn+D+M menu (as it's in ROM) to save you from a bad subsequent flashing...  Is there any way to patch the in-flash version of the firmware? Can it be done by running some scripts in the SD or CF card or by connecting to the serial port? Since the Fn+D+M is rarely used and even if it's needed, we can restore the original fireware and patch it again. I wonder how much we can do with the Service Menu. The good thing is, if we can modify the firmware, we might be able to use even larger flash chips--maybe a 1GByte one. |
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Posts in this topic
wrc4 Sl-7500c 128m Flash Upgrade Failed! Sep 18 2006, 07:05 PM
Reaper I'm going to upgrade my C3000 and the first th... Sep 18 2006, 08:33 PM
wrc4 QUOTE(Reaper @ Sep 18 2006, 08:33 PM)I'm ... Sep 19 2006, 12:11 AM Hrw wrc4: you probably need to use same chip as the on... Sep 19 2006, 04:10 AM wrc4 QUOTE(Hrw @ Sep 19 2006, 04:10 AM)wrc4: you p... Sep 19 2006, 05:08 AM wrc4 I found a same 64MB chip as the previous one and s... Sep 22 2006, 01:50 AM chyang Wow, so cool.
I even asked the maker on this repai... Sep 22 2006, 02:08 AM pelrun What was the full code on the original chip? When ... Sep 22 2006, 05:36 AM wrc4 pelrun,
The full code is:
K9F1G08UOM YCBO
I wil... Sep 22 2006, 04:52 PM pelrun No, I meant the original chip from your Z, you alr... Sep 22 2006, 07:49 PM wrc4 QUOTE(pelrun @ Sep 22 2006, 07:49 PM)No, I me... Sep 23 2006, 12:54 AM pelrun How would you replace the firmware if you need the... Sep 23 2006, 06:30 PM wrc4 QUOTE(pelrun @ Sep 23 2006, 06:30 PM)How woul... Sep 23 2006, 07:37 PM guylhem The easiest way is to fill up the new chip with a ... Sep 25 2006, 03:58 AM speculatrix is it possible to put a jtag interface on the Z an... Sep 26 2006, 12:59 AM albertr I belive that JTAG is available on the Zaurus, At ... Sep 26 2006, 08:33 AM guylhem The P2ROM is where the FN+D+M menu is stored, but ... Sep 28 2006, 07:02 AM Hrw http://www.hrw.one.pl/2006/08/09/sharp-zaurus-jtag... Sep 28 2006, 11:20 PM albertr Hrw, your link must be for old Zaurii models, like... Sep 30 2006, 03:15 PM Hrw albertr: iirc there was infos that cxx00 serial i/... Oct 1 2006, 02:34 AM scholbert QUOTE(Hrw @ Oct 1 2006, 11:34 AM)albertr: iir... Nov 28 2006, 02:55 PM albertr QUOTE(scholbert @ Nov 28 2006, 05:55 PM)In an... Nov 30 2006, 06:19 PM scholbert QUOTE(albertr @ Dec 1 2006, 03:19 AM)QUOTE(sc... Dec 1 2006, 06:28 AM Reaper My old (and bricked due to KB cable/connector prob... Oct 1 2006, 08:35 AM guylhem Hrw - I didn't see that in the 3xxx service ma... Oct 4 2006, 01:25 AM Reaper Thank you very much for advice. I'll try it as... Oct 4 2006, 09:59 AM Hrw Hmm. checked in 3100sm and there is UART connected... Nov 28 2006, 04:23 PM scholbert QUOTE(Hrw @ Nov 29 2006, 01:23 AM)Hmm. checke... Nov 29 2006, 07:14 AM guylhem According to the datasheets, there are JTAG lines ... Dec 1 2006, 04:32 AM albertr No problem, I just wanted to set the record streig... Dec 1 2006, 11:13 AM pelrun The 3100 schematic definitely provides for JTAG wi... Dec 1 2006, 06:32 PM scholbert Hi pelrun,
great information. I thought it would ... Dec 3 2006, 02:10 PM |
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