HP 3000 Manuals

MPE Debug/Stack Dump Reference Manual

FREEZING/UNFREEZING SEGMENTS IN PRIVILEGED MODE 

During DEBUG operations it is occasionally necessary to freeze your code
and data so that swapping does not alter the current locations.  This is
important particularly when you want to determine absolute locations.
The F command is used to freeze code (FCO) or data (FDA). The U command
unfreezes code (UCO) or data (UDA).

Suppose you want to freeze your code and data segments, first you can use
DR to determine the segment numbers, then freeze those segments:

           ?DR,CST,STAK 
           CST=301,STAK=214
           ?FCO 301 
           ?FDA 214 

You can then display the contents of the first 8 words (absolute address
0-7) of these segments as follows:

          ?DCO 301 ,10 
          ?DDA 214 ,10 

You can then unfreeze these segments and continue by entering:

          ?UCO 301 
          ?UDA 214 

MPE/iX 5.0 Documentation