Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!tut.cis.ohio-state.edu!ucbvax!PACEVM.BITNET!VMAN
From: VMAN@PACEVM.BITNET (cliff brenner)
Newsgroups: comp.lang.asm370
Subject: info on ipk and spka instructions
Message-ID: <9001181830.AA15303@lilac.berkeley.edu>
Date: 18 Jan 90 15:08:04 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Reply-To: IBM 370 Assembly Programming Discussion List <ASM370%UCF1VM.bitnet@lilac.berkeley.edu>
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 can anyone explain the syntax and operation of these statements for me?
 i cannot find their definition in my favorite text (assembly language,
 george struble, third edition, 1984).  i gather they manipulate the psw,
 but in the only example i've seen of their use, i don't understand how:

                   ipk   ,         * get psw key into r2
                   st    2,key     * save key
                   spka  0(0)      * set key to 0

 any help would be appreciated.  thank you in advance.