Ok, if you want to dump the syscon error log you don't need to do any soldering.
You can relay the Syscon serial port from the DECR to your PC over the network.
First, you need to exploit the CP - you can use the "root_cp.py" script for that:
https://github.com/jevinskie/ps3-decr-stuff/blob/master/root_cp.py .
After that, open a telnet shell which connects to the CP, the username is "rt" with no password.
Also connect a FTP client to the CP, port 21 with username "rt" and no password.
Transfer the files "ser2net" and "ser2net.conf" in the (default) root user directory on the CP via the FTP client.
Then run "chmod +rx ser2net" and "./ser2net -c ser2net.conf" in the telnet shell.
This maps the Syscon serial port to the network.
The changes aren't persistent, if the CP is rebooted you need to follow the previous steps again.
Now you need to connect to it and map it to a local serial port on your PC.
For Windows:
https://gist.github.com/DraTeots/e0c669608466470baa6c#client
( use this com0com version if you're on Windows 8.1 or later:
https://sourceforge.net/projects/co...0/com0com-2.2.2.0-x64-fre-signed.zip/download )
For Linux:
https://gist.github.com/DraTeots/e0c669608466470baa6c#linux-client
After the local serial port is available (in the Windows sample ""COM20"), you can connect to it using the normal syscon script (
https://www.psdevwiki.com/ps3/Talk:..._squeasy_way_.28UART.29_.28CXR.2FCXRF.2FSW.29) and run the errlog command (the Syscon in the DECR runs by default in internal (CXRF) mode and has no external mode).
Please note that the terminal which runs the "com2tcp-rfc2217.bat" has to stay open during the script operation else the port isn't actively mapped.
Thank you for the detailed instructions!
Where can I find the logs? The "errlog" command seems to do nothing...
EDIT: NVM found my mistake, here's the log:
C:\Temp>C:\Python36\python.exe sysconauth.py COM4 CXRF
> errlog
(PowerOff State)
errlog
ofst[ 8]:err_code:0xffffffff, clock:0x15388fd3 2011/04/13 16:46:11
ofst[ 12]:err_code:0xa0801001, clock:0x15a2fb2f 2011/07/03 10:04:31
ofst[ 16]:err_code:0xa0901004, clock:0x15a2fb2f 2011/07/03 10:04:31
ofst[ 20]:err_code:0xa0801001, clock:0x167cabad 2011/12/15 12:59:25
ofst[ 24]:err_code:0xa0901004, clock:0x167cabae 2011/12/15 12:59:26
ofst[ 28]:err_code:0xa0902020, clock:0x167cabae 2011/12/15 12:59:26
ofst[ 32]:err_code:0xa0801001, clock:0x18805df8 2013/01/09 16:57:28
ofst[ 36]:err_code:0xa0901004, clock:0x18805df8 2013/01/09 16:57:28
ofst[ 40]:err_code:0xa0801001, clock:0x188801ff 2013/01/15 12:03:11
ofst[ 44]:err_code:0xa0801004, clock:0x188801ff 2013/01/15 12:03:11
ofst[ 48]:err_code:0xa0801001, clock:0x1a10d6fc 2013/11/09 11:20:28
ofst[ 52]:err_code:0xa0901004, clock:0x1a10d6fc 2013/11/09 11:20:28
ofst[ 56]:err_code:0xa0801004, clock:0x0b4ea4fe 2006/01/04 15:23:42
ofst[ 60]:err_code:0xa0003001, clock:0xffffffff
ofst[ 64]:err_code:0xa0003001, clock:0xffffffff
ofst[ 68]:err_code:0xa0003001, clock:0xffffffff
ofst[ 72]:err_code:0xa0003001, clock:0xffffffff
ofst[ 76]:err_code:0xa0003001, clock:0xffffffff
ofst[ 80]:err_code:0xa0003001, clock:0xffffffff
ofst[ 84]:err_code:0xa0003001, clock:0xffffffff
ofst[ 88]:err_code:0xa0003001, clock:0xffffffff
ofst[ 92]:err_code:0xa0003001, clock:0xffffffff
ofst[ 96]:err_code:0xa0003001, clock:0xffffffff
ofst[100]:err_code:0xa0003001, clock:0xffffffff
ofst[104]:err_code:0xa0003001, clock:0xffffffff
ofst[108]:err_code:0xa0003001, clock:0xffffffff
ofst[112]:err_code:0xa0003001, clock:0xffffffff
ofst[116]:err_code:0xa0003001, clock:0xffffffff
ofst[120]:err_code:0xa0003001, clock:0xffffffff
ofst[124]:err_code:0xa0003001, clock:0xffffffff
ofst[ 0]:err_code:0xa0003001, clock:0xffffffff
ofst[ 4]:err_code:0xa0003001, clock:0xffffffff
[mullion]$
> errlog
(PowerOff State) (Fatal)
errlog
ofst[ 12]:err_code:0xffffffff, clock:0x15a2fb2f 2011/07/03 10:04:31
ofst[ 16]:err_code:0xa0901004, clock:0x15a2fb2f 2011/07/03 10:04:31
ofst[ 20]:err_code:0xa0801001, clock:0x167cabad 2011/12/15 12:59:25
ofst[ 24]:err_code:0xa0901004, clock:0x167cabae 2011/12/15 12:59:26
ofst[ 28]:err_code:0xa0902020, clock:0x167cabae 2011/12/15 12:59:26
ofst[ 32]:err_code:0xa0801001, clock:0x18805df8 2013/01/09 16:57:28
ofst[ 36]:err_code:0xa0901004, clock:0x18805df8 2013/01/09 16:57:28
ofst[ 40]:err_code:0xa0801001, clock:0x188801ff 2013/01/15 12:03:11
ofst[ 44]:err_code:0xa0801004, clock:0x188801ff 2013/01/15 12:03:11
ofst[ 48]:err_code:0xa0801001, clock:0x1a10d6fc 2013/11/09 11:20:28
ofst[ 52]:err_code:0xa0901004, clock:0x1a10d6fc 2013/11/09 11:20:28
ofst[ 56]:err_code:0xa0801004, clock:0x0b4ea4fe 2006/01/04 15:23:42
ofst[ 60]:err_code:0xa0003001, clock:0xffffffff
ofst[ 64]:err_code:0xa0003001, clock:0xffffffff
ofst[ 68]:err_code:0xa0003001, clock:0xffffffff
ofst[ 72]:err_code:0xa0003001, clock:0xffffffff
ofst[ 76]:err_code:0xa0003001, clock:0xffffffff
ofst[ 80]:err_code:0xa0003001, clock:0xffffffff
ofst[ 84]:err_code:0xa0003001, clock:0xffffffff
ofst[ 88]:err_code:0xa0003001, clock:0xffffffff
ofst[ 92]:err_code:0xa0003001, clock:0xffffffff
ofst[ 96]:err_code:0xa0003001, clock:0xffffffff
ofst[100]:err_code:0xa0003001, clock:0xffffffff
ofst[104]:err_code:0xa0003001, clock:0xffffffff
ofst[108]:err_code:0xa0003001, clock:0xffffffff
ofst[112]:err_code:0xa0003001, clock:0xffffffff
ofst[116]:err_code:0xa0003001, clock:0xffffffff
ofst[120]:err_code:0xa0003001, clock:0xffffffff
ofst[124]:err_code:0xa0003001, clock:0xffffffff
ofst[ 0]:err_code:0xa0003001, clock:0xffffffff
ofst[ 4]:err_code:0xa0003001, clock:0xffffffff
ofst[ 8]:err_code:0xa0003001, clock:0xffffffff
[mullion]$
>