gtpn1m0d | Non-SNA Data Communications Reference |
This package, when activated by a command, intercepts CCP processing of all CCP macros, SIOSCs, RIOSCs and multiplexor interrupts. If the line being operated on has been specified as a line to be traced, a snapshot of pertinent areas of core is taken and stored in a slot within a 1055-byte core block, before returning to normal CCP operation.
When all slots of this core block have been used, it is either reused or written to the RTL/RTA tape, depending on the option specified in the last CCP Trace command.
If the option of writing to the RTL/RTA tape is used, processing the RTL/RTA tape with DOF will produce a formatted listing of all items traced.
At any time while CCP Trace is active additional lines may be added to the list of lines being traced, and the option of writing to the RTL/RTA tape or reusing the core block may be varied via command. Also, CCP Trace may be deactivated at any time via command. When CCP Trace is deactivated, tracing is forced into "wrap-around" in core trace, and tracing will continue on the PRC and RO.