At 20:00 -0400 on 08/07/2011, Robert A. Rosenberg wrote about Re:
Suffix of 64 bit instructions:
<x-flowed>At 18:54 -0400 on 08/07/2011, Micheal Butz wrote about Re: Suffix of
64 bit instructions:
Think the B2 opcodes are all two bytes
Sent from my iPhone
On Aug 7, 2011, at 1:01 PM, "Shmuel Metz (Seymour J.)"
<[email protected]> wrote:
In <[email protected]>, on 08/07/2011
at 07:13 AM, Micheal Butz <[email protected]> said:
First time that second byte of the opcode was at the end of the inst
True AFAIK, but S/360 did have opcodes running into bits 16-23.
Are any of them S/360 opcodes or were the introduced with S/370+
architecture? I took a look at them and none jumped out at me to say
that they were something that was available on the S/360.
Thanks to the Wikipedia S/360 article I was able to download a copy
of the S/360 PoPs manual can confirm my impression that ALL the S/360
opcodes were one byte long (and that B2 opcodes were not part of the
architecture). In Fact - No opcode from A0-D0 was valid.
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