Hello,
after longer reading this is my very first posting here - so for the first:
MANY, many thanks for this outstanding community and forum!
Currently i am trying to repair a TDS7054.
As the PowerCAP of the NVRAM was empty, i had to replace that and to restore the data needed to boot the PPC board.
Therefore i used similar data as shown here
https://www.eevblog.com/forum/testgear/tek-csa7404-repair-project/ or here
http://dev.xdevs.com/projects/csa7404/wiki/Wiki.
Instead of the startup script file "c:\vxBoot\dio_rst.vsh" - which i could not find on my hard drives - i used "c:\vxBoot\topScript.hw". I found a hint referencing this file as the script anywhere in the internet, without knowing if this is ok...
But i think, my TDS does not execute this script anyway, as soon after the big VxWorks ASCII logo and just below the "usrNvFsInit"-line it does not show the correct:
"nvfs: WARNING: Creating new NVRAM file system" (as shown in the CSA7404 repair project),
but it stops immediately with an exception:
usrNvFsInit: NAME=/nvram BASE=0xfd0ff100 BPB=512 BPT=8 NB=8 BO=0
data access
Exception current instruction address: 0x00223f98
Machine Status Register: 0x0000b030
Data Access Register: 0xf9f8f416
Condition Register: 0x20000042
Data storage interrupt Register: 0x40000000
Task: 0x1fffe08 "tRootTask"
So my questions are:
1) What is the correct content of the "c:\vxBoot\dio_rst.vsh" file - and/or: is "c:\vxBoot\topScript.hw" really a suitable supplement for this file?
2) What is the meaning of the exception message above? Does it indicate a hardware failure on the PPC-Board?
As i used two different hard disks for trying the TDS7054 to boot from (one with a Win95-Installation, and one with a WinXP-Installation - and both working perfectly on other TDS7054 hardware), i currently do not think that a defective "vxWorks.st" file is the reason for the error...
Thanks to everybody for reading so far - and i will be very happy with any hint or help...
Kind regards
Norbert