Found this in JES2 Data Areas Volume 1:

Chapter 106. $IRIS Information
$IRIS Programming Interface Information
$IRIS is a programming interface.
$IRIS Heading Information
Common Name: IRIS
Macro ID: $IRIS
DSECT Name: IRIS
Owning Component: JES2 (SC1BH)
Eye-Catcher ID: IRIS
Offset: IRSEYE-IRS
Length: L’IRSEYE
Storage Attributes: Subpool: 241
Key: 1
Residency: Virtual storage is in 31 bit storage, real can be in
64 bit storage, in common storage
Size: See IRISLEN
Created by: HASPIRMA during JES2 initialization processing
Pointed to by: CCTBATMD field of the HCCT data area
CCTIRSMD field of the HCCT data area
CCTSTCMD field of the HCCT data area
CCTTSOMD field of the HCCT data area
Serialization: None required
Function: This area maps the data area used to store defaults
for internal readers (as set from INTRDR
initialization statement). One exists for each type
of internal reader (in ECSA) even though the
initialization statement only applies to batch
internal readers.

I'm no longer in a JES2 shop, so I can't easily play.

On Mon, Dec 7, 2015 at 9:19 AM, Gabor Hoffer <gabor.hof...@gmail.com> wrote:

> Yes, it's the output from $DINTRDR, but I want to get it directly.
> I'm wondering, if it can be inquired by SSI call or extracted from mvs/jes
> data areas.
>
> On Mon, Dec 7, 2015 at 3:57 PM, Paul Gilmartin <
> 0000000433f07816-dmarc-requ...@listserv.ua.edu> wrote:
>
> > On Mon, 7 Dec 2015 15:45:46 +0100, Lucas Rosalen wrote:
> >
> > >Looks like $DINTRDR would suffice or $DINTRDR,C. Check this out:
> > >
> >
> https://www-01.ibm.com/support/knowledgecenter/mobile/#!/SSLTBW_2.1.0/com.ibm.zos.v2r1.hasa200/dintrdr.htm
> > >
> > How do you code that in ASM or C (OP's question).  I suppose MGCR in ASM
> > (Is MGR now specified to support other than START or REPLY?)  How do
> > you capture the output?
> >
> >
> > >On Dec 7, 2015 15:33, "Gabor Hoffer" wrote:
> > >
> > >> How can I inquire the internal reader characteristics from program
> (asm,
> > >> c)?
> > >>
> > >> $HASP838 INTRDR
> > >> $HASP838 INTRDR  AUTH=(DEVICE=NO,JOB=NO,SYSTEM=NO),BATCH=YES,
> > >> $HASP838         CLASS=X,HOLD=NO,HONORLIM=NO,PRTYINC=0,
> > >> $HASP838         PRTYLIM=15,SYSAFF=(ANY),TRACE=NO
> > >>
> > >> Actually, I'm interested in default job class.
> > >> Thanks in advance.
> >
> > -- gil
> >
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