First time that second byte of the opcode was at the end of the inst

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On Aug 7, 2011, at 2:00 AM, "Shmuel Metz (Seymour J.)" <[email protected] > wrote:

In <[email protected]>, on 08/05/2011
  at 06:23 PM, Micheal Butz <[email protected]> said:

A number of the 64 bit instruction Seem to have a constant in
the last Byte e.g. LG. 58 STG 50 would anyone know the
siginifcance of this

It's part of the opcode, and not limited to "grandé" instructions.
There have been extended opcodes since the System/360, although the
ones that I recall were not in PoOps.

--
    Shmuel (Seymour J.) Metz, SysProg and JOAT
    ISO position; see <http://patriot.net/~shmuel/resume/brief.html>
We don't care. We don't have to care, we're Congress.
(S877: The Shut up and Eat Your spam act of 2003)

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