steve-myers
Active Member
Joined: 30 Nov 2013
Posts: 917
Location: The Universe
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| jackzhang75 wrote: |
Hi steve,
I am still not understand that why this program has to be called by another program ? Are there some insturctions in GETJOBI are made for this purpose ?
I want to know more about TIOT and TCB address or other relative control block , which book is take about this in details ?
Thanks |
Jack, you are correct. Much of this I learned 40 or more years ago. After 40 years I can't tell you how I found this. In fact, when you get right down to it, it's not relevant today.
Today, I write
| Code: |
L 15,CVTPTR
L 15,CVTTCBP-CVTMAP(,15)
L 15,4(,15)
L 15,TCBTIO-TCB(,15)
MVC JOBNAME,TIOCNJOB-TIOT1(15) |
to get the current jobname. This is the exact same code I would write in 1969, though in 1969 I would be forced to use "magic" numbers for data areas since IBM was reluctant to supply mapping DSECTs for major control blocks like the CVT, TCB and the TIOT. In 1969 I had to use printed documentation that has been somewhat replicated in manuals with different titles than in 1969. Unless I could find other people's code, I had to dig through the manuals, just as you have to. There aren't many short cuts. Now you have internet resources like this one, which we did not have in 1969, which can serve as a short cut sometimes. In 1969 there were other resources, most of which no longer exist, us beginners could and often did, use. |
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Bill O'Boyle
CICS Moderator
Joined: 14 Jan 2008
Posts: 2501
Location: Atlanta, Georgia, USA
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| Quote: |
| z/Architecture and the LLGT instruction did not exist 20 years ago. z/Architecture is 15 years old. |
You've misunderstood. CICS/TS 4.2 was released around 3 years ago and this is when the DFHAFCD TYPE=LOCATE Macro was changed from using an "L" to using an "LLGT". |
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