==============================================
-----Original Message-----
From: "Tribble, Robert" <[EMAIL PROTECTED]>
Sent: 7/6/2006 9:44 AM
To: "[email protected]" <[email protected]>
Subject: Re: hardware compression
Here is a rexx:
/* REXX */
CVT = STORAGE(10,4) /* CVT ADDRESS IN MEMORY */
SCVT = STORAGE(D2X(200+C2D(CVT)),4) /* ADDRESS OF SCVT */
CCVT = STORAGE(D2X(184+C2D(SCVT)),4) /* ADDRESS OF CCVT */
IF CCVT = '00000000'X THEN DO
say 'Cryptography Not Installed'
EXIT(0)
END
ELSE DO
CCVTFL = STORAGE(D2X(36+C2D(CCVT)),1) /* CCVTSFG1 STATUS BYTE */
IF BITAND(CCVTFL,'80'X) <> '80'X THEN DO
say 'Cryptography is Installed',
'but is Inactive'
EXIT(0)
END
ELSE DO
say 'Cryptography is Active'
CCVTAS = STORAGE(D2X(42+C2D(CCVT)),2) /* CCVTASID ASID OF ICSF */
say 'ASID of ICSF/MVS Address Space is' c2x(ccvtas) '('c2d(ccvtas)')'
EXIT(0)
END
END
==============================================
Greetings,
Your example is describing the ICSF (Cryptographic Services), not
compression. The OP was asking about hardware compression
availability.
Also, the publicly documented crypto instructions (KM, KMC, KMAC, etc.)
may be available even though the CCVT pointer is NULL. The only way to
know for sure is to try KM (with the query function code in R0) and
catch the potential S0C1-01 abend.
Jeffrey D. Smith
Farsight Systems Corporation
24 BURLINGTON DR
LONGMONT, CO 80501
303-774-9381 direct
303-709-8153 cell
303-484-6170 fax
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