TREP mapping

Table 1. Structure TREP
`Offset Dec`	`Offset Hex`	`Type`	`Len`	`Name(Dim)`	`Description`
`0`	`(0)`	`STRUCTURE`	`0`	`TREP`
`0`	`(0)`	`SIGNED`	`4`	`TREPREF(0)`	`FIELD TO PERMIT REFERENCING FIRST WORD IN PARM LIST`
`0`	`(0)`	`DBL WORD`	`8`	`TREPSTIM`	`- TRANSACTION START TIME (STCK FORMAT)`
`8`	`(8)`	`DBL WORD`	`8`	`TREPICSV(0)`	`- DESCRIPTION/SERVICE`
`8`	`(8)`	`DBL WORD`	`8`	`TREPICSP(0)`	`- TRANSACTION DESCRIPTION`
`8`	`(8)`	`CHARACTER`	`8`	`TREPSSNM`	`- SUBSYSTEM NAME`
`16`	`(10)`	`CHARACTER`	`8`	`TREPTRXN`	`- TRANSACTION NAME`
`24`	`(18)`	`CHARACTER`	`8`	`TREPUSID`	`- USERID`
`32`	`(20)`	`CHARACTER`	`8`	`TREPTRXC`	`- TRANSACTION CLASS`
`40`	`(28)`	`DBL WORD`	`8`	`TREPSVCE(0)`	`- SERVICE PARAMETERS`
`40`	`(28)`	`DBL WORD`	`8`	`TREPCPUT`	`- CPU TIME (STCK FORMAT)`
`48`	`(30)`	`DBL WORD`	`8`	`TREPSRBT`	`- SRB TIME (STCK FORMAT)`
`56`	`(38)`	`DBL WORD`	`8`	`TREPMSOT`	`- MAIN STORAGE OCCUPANCY (PAGE-MSECS)`
`64`	`(40)`	`SIGNED`	`4`	`TREPIOCT`	`- LOGICAL I/O COUNT`
`68`	`(44)`	`CHARACTER`	`1`	`TREPFLGS`	`- FLAG BITS`
		`1... ....`		`TREPDCTI`	`"BIT0" - 1 IF TREPIOCT CONTAINS DCTI, 0 IF TREPIOCT CONTAINS LOGICAL I/O COUNT`
`69`	`(45)`	`CHARACTER`	`3`	`TREPRSVD`	`- RESERVED`
`72`	`(48)`	`DBL WORD`	`8`	`TREPEND(0)`	`- END OF TREP TABLE`
`72`	`(48)`	`X'48'`	`0`	`TREPLEN`	`"TREPEND-TREP" - LENGTH OF TREP TABLE`