On Sun, Sep 18, 2022, 18:16 Tom Harper <tomhar...@phoenixsoftware.com>
wrote:
> Sometimes R15 contains the entry point.
>
> If the routine receives control from ATTACHX or LINKX, for instance, and
> if it is to run in AMODE(64), then it does not.
>
> A better solution is to use
>
> LARL R12,PROGNAME
> USING PROGNAME, R12
>
> which has no dependency on R15.
>
I have used that. In the past, I also used
BALR R12,0
USING *,R12
> Tom Harper
> Phoenix Software International
>
> Sent from my iPhone
>
> > On Sep 18, 2022, at 5:06 PM, Mike Schwab <mike.a.sch...@gmail.com>
> wrote:
> >
> > When you enter a program, R15 points to the first byte of PROGNAME.
> > You usually have a USING R15,PROGNAME.
> > If you are going to be calling OS functions or programs, you will copy
> > R15 to another register (often R12), issue a USING R12,PROGNAME and
> > DROP R15,PROGNAME. So when using a label within 4K of PROGNAME, the
> > assembler will use the USING register, and compute the offset from
> > PROGNAME.
> >
> >> On Sun, Sep 18, 2022 at 8:12 AM Bob Bridges <robhbrid...@gmail.com>
> wrote:
> >>
> >> Twenty years ago I wrote a few programs for Excel, and didn't see what
> all the fuss was about: "object-oriented" didn't seem very different from
> traditional programming that I'd been doing for 25 years. (At the same
> time I was frequently infuriated at the message "...does not support this
> property or method", exactly because I ~didn't~ understand what was
> different about OO coding.)
> >>
> >> Eventually a VBA programmer advised me a bit more, and I'm now an
> enthusiast, about OO at least. Not so much about the Visual flavors of
> Basic itself, but it was my introduction to OO and it is at least available
> on all Windows machines and in all MS Office apps, which is handy.
> >>
> >> What confuses me (so far) is the concept of addressability in HLASM.
> Every time I make a stab at writing my first assembler program I get a
> little closer, but I'm still not there yet. In other assemblers I got
> quite familiar with indirect and offset addressing - it isn't that - but
> what exactly happens with the USING instruction still eludes me.
> >>
> >> ---
> >> Bob Bridges, robhbrid...@gmail.com, cell 336 382-7313
> >>
> >> /* Revenge can be bitter-sweet. But if you sit back and watch, karma
> can be pure entertainment. -found on Facebook 2015 */
> >>
> >> -----Original Message-----
> >> From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> On
> Behalf Of Tom Brennan
> >> Sent: Sunday, September 18, 2022 00:59
> >>
> >> As for programming, I seem to do better starting at the bottom, with
> instructions, registers, PSW bits and such, and moving up from there.
> Higher level languages and especially Object Oriented code tend to confuse
> me.
> >>
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> >
> >
> > --
> > Mike A Schwab, Springfield IL USA
> > Where do Forest Rangers go to get away from it all?
> >
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