I believe that there is no TCB, SVRB, etc. for a type 1 SVC; because it requires the LOCAL LOCK. The status for an interrupted type 1 SVC is saved in the IHSA, interrupt handler save area (one per processor). The ASXB points to the IHSA. Refer to the MVS DATA AREAs VOL 2, and MVS Diagnosis Reference Chap. 4. I'm a very senior citizen; so, I could be incorrect.
Regards, Jim On Sun, Nov 28, 2021 at 3:36 AM Binyamin Dissen <[email protected]> wrote: > On Fri, 26 Nov 2021 02:16:30 -0500 David Cole <[email protected]> wrote: > > :>I have an ancient question... It seems to me I should know this after > :>all these decades, but... I don't. > > :>While a type-1 SVC is running, where is the resume state data > :>(registers, PSW, etc.) stashed? > > Split up between the TCB, STCB and PRB. > > :>Is it the same for type-6? > > Doubt it. It may rely on the SVC FLIH save area as it runs disabled. > > :>And while I'm at it, what are the differences between type-1 and > :>type-6 SVCs, anyway> > > T6 is best if you are likely to schedule an SRB and/or you need better > performance than type 1. > > -- > Binyamin Dissen <[email protected]> > http://www.dissensoftware.com > > Director, Dissen Software, Bar & Grill - Israel > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
