This selection is similar to the operation code trace, except that the use of selected modifiers will be traced instead of OP codes. The following message will be issued requesting the modifiers to be traced:
enter mods:
The response must consist of one or more modifiers, each of which must be specified in the same manner as for GMAP coding. Note that only first level modifiers will be traced; i.e., modifiers encountered in an indirect chain will not be considered. As an example, the following response would trace all uses of index register 1 for modification purposes and the modifiers DL,SC and CI:
enter mods: 1,1*,*1,dl,sc,ci
The modifiers N, N* and *N may also be specified; however, N* must be specified as simply *.
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