DSP minimal trace record

GTF builds a DSP minimal record when an entry is made to the dispatcher to dispatch a unit of work and both TRACE=SYSM,DSP are the GTF options in effect.

The FID for the DSP minimal trace record is X'03'. The EID is one of the following values:

X'0001' - indicates SRB dispatching.
X'0002' - indicates LSR dispatching.
X'0003' - indicates TCB dispatching.
X'0004' - indicates exit prolog dispatching.

Table 1. Values for DSP minimal trace record
Offset	Size	Description
0 (0)	4	ASCB.
4 (4)	2	CPUID.
6 (6)	16	Resume PSW for work unit that is being dispatched.
22 (16)	4	Current TCB or N/A (for TCB and LSR only).
26 (1A)	4	Register 15.
30 (1E)	4	Register 0 or SRB.
34 (22)	4	Register 1.
38 (26)	1	For SRB only. The SRB routine type indicator. S for a suspended SRB that is about to be redispatched. I for an SRB that is about to be dispatched for the first (initial) time.