- Entry:
- DAPT
- VIT option:
- HPR
- Event:
- DAPTR alteration
- VIT processing module:
- ISTITCHP
This trace record shows most of the DAPTR fields. The
DAPTR is used to chain inbound HPR data that arrives out of order
or in order but is segmented into pieces. The DAPTR resides either
on the RPN_OutOfSeq_Msg_Q or RPN_RCV_Segments_DaPtr queue of the RPNCB
that is currently dispatched. The record shows the updated contents
of the DAPTR. 
- Byte (hex)
- Contents
- 00–03
- Record ID: C"DAPT"
- 04
- ID is the primary address space ID (ASID). This field is 0 if the ASID is greater than X'FF'.
- 05
- DAPTR type
- O
- Out of sequence queue
- S
- Received segments queue
- 06
- NLP count (X'FF' if 255 or greater)
- 07
- DAP_Flags:
- Bit
- Meaning
- 1... ....
- DAP_End_Msg
- .1.. ....
- DAP_Beg_Msg
- ..1. ....
- DAP_Last_Msg
- ...1 ....
- DAP_COB_Ind
- .... xxxx
- 0
- 08–0B
- DAP_First_Head_TSCB
- 0C–0F
- DAP_Last_Head_TSCB
- 10–13
- DAP_Begin_Seq
- 14–17
- DAP_End_Seq
- 18–1B
- RPNCB address
- 1C–1F
- DAPTR address