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From: USERALVE@RPITSMTS.BITNET (Brian Eliot)
Newsgroups: comp.lang.asm370
Subject: Re: CESD Data in Load Modules
Message-ID: <9103191752.AA09532@ucbvax.Berkeley.EDU>
Date: 19 Mar 91 17:05:00 GMT
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Reply-To: IBM 370 Assembly Programming Discussion List
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Versions of Assembler H prior to Version 2, and presumably other
language translators as well which predated the definition of
the RSECT, AMODE, and RMODE control section attributes, generated
the ESD attribute byte as a blank (X'40').  My guess is that the
CESD bit 1 being on is an artifact of these older object modules.
Assembler H Version 2 now generates bit 1 as a zero, and presumably
for compatibility with old object modules bit 1 has no meaning.

Brian Eliot
Information Technology Services
Rensselaer Polytechnic Institute