Programs can view storage at absolute address zero by viewing the real
storage addressed by the prefix register for the processor executing the code.
I’m pretty sure the IPL text is in the first few bytes.
On Wed, Nov 6, 2019 at 1:01 PM -0600, "Charles Mills" <charl...@mcn.org> wrote:
Kind of like clearing a register before an LH.
Charles
-----Original Message-----
From: IBM Mainframe Assembler List [mailto:ASSEMBLER-LIST@LISTSERV.UGA.EDU] On
Behalf Of Steve Smith
Sent: Wednesday, November 6, 2019 10:45 AM
To: ASSEMBLER-LIST@LISTSERV.UGA.EDU
Subject: Re: Questionable Instructions in Obtaining EAX documentation
Prefixing is absolutely* irrelevant to this discussion, and to 99.99% of
assembler programmers for their entire lives. It's well-documented if
you're interested, but you probably aren't. Any discussion here is very
likely to be spurious, specious, and superficial.
