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Programming Interface Information:
This information is NOT intended to be used as Programming Interfaces of z/VM. |
DCWBK
Control Block Contents
DCWBK DSECT
Cross Reference (Contains links to field and bit definitions)
DCWBK Prolog
NAME : HCPDCWBK
DESCRIPTION: Device Command Word (DCW)
DSECT : DCWBK
FUNCTION : Provide symbolic reference to the fields of a
Device Command Word (DCW) used by Fibre Channel
Extensions (FCX)
LOCATED BY : N/A
CREATED BY : N/A
DELETED BY : NA
DCWBK Control Block Content
DCWBK DSECT
Hex Dec Type/Val Lng Label (dup) Comments ---- ---- --------- ---- -------------- -------- 0000 0 Structure DCWBK Device Command Word (DCW) 0000 0 Signed 4 DCWCFCT (0) DCW first word - cmd, flag, and control data count 0000 0 Bitstring 1 DCWCMND DCW Command Code 0001 1 Bitstring 1 DCWFLAG DCW Flag byte .1.. .... DCWCC X'40' DCWCC Chain-Command (CC) flag All other bits reserved for IBM use 0002 2 Bitstring 1 DCWW0B2 Reserved for IBM use 0003 3 Bitstring 1 DCWCDCT DCW Control Data Count 0004 4 Signed 4 DCWCNT DCW Data Count (unsigned) 0008 8 Dbl-Word 8 DCWNEXT (0) DCW following current DCW 00000008 DCWBKBSZ (*-DCWBK) DCW byte size 00000001 DCWBKDSZ (*-DCWBK+7)/8 DCW dword size
DCWBK Storage Layout
*** DCWBK - Device Command Word (DCW)
*
* +------+------+------+------+---------------------------+
* 0 |:CMND |:FLAG |:W0B2 |:CDCT | DCWCNT |
* +------+------+------+------+---------------------------+
*
*** DCWBK - Device Command Word (DCW)
DCWBK Cross Reference
Symbol Dspl Value -------------- ---- ----- DCWBKBSZ 0008 00000008 DCWBKDSZ 0008 00000001 DCWCC 0001 40 DCWCDCT 0003 DCWCFCT 0000 DCWCMND 0000 DCWCNT 0004 DCWFLAG 0001 DCWNEXT 0008 DCWW0B2 0002
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