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Programming Interface Information:
This information is NOT
intended to be
used as Programming Interfaces of VM/ESA. It is to be used for diagnosis only. |
VFCBK
Cross Reference (Contains links to field and bit definitions)
VFCBK Prolog
NAME : HCPVFCBK
DESCRIPTION: VIRTUAL FORMS BUFFER CONTROL BLOCK
DSECT : VFCBK
FUNCTION : CONTAINS THE FORMS CONTROL BUFFER DATA AND CONTROL
INFORMATION FOR A VIRTUAL SPOOLING DEVICE.
LOCATED BY : VDSVFC FIELD OF HCPVDSBK
CREATED BY : HCPSCB - FOR PROCESSING THE LOADBUF COMMAND
DELETED BY : HCPDTD - WHEN THE DEVICE IS DETACHED
VFCBK Control Block Content
VFCBK DSECT
Hex Dec Type/Val Lng Label (dup) Comments ---- ---- --------- ---- -------------- -------- 0000 0 Structure VFCBK VIRTUAL FORMS BUFFER CONTROL BLOCK 0000 0 Character 4 VFCBNAME FCB'S NAME 0004 4 Bitstring 1 VFCBFLAG STATUS FLAGS 1... .... VFCBEOF X'80' END OF FORMS PASSED ONCE .1.. .... VFCBDIAG X'40' USED IN 'READ BUFFER' SUPPORT ..1. .... VFCBFCBV X'20' FCB DATA VALID ...1 .... VFCBREP X'10' FCB DATA HAS JUST BEEN REPLACED 0005 5 Bitstring 1 VFCBNUM CHANNEL NUMBER OR SPACE COUNT 0006 6 Signed 2 VFCBPOSN CURRENT LINE NUMBER 0008 8 Signed 4 VFCBWORK (0) WORK WORD 0008 8 Bitstring 1 VFCBPRED THE LAST CCW ISSUED 0009 9 Bitstring 1 * (3) SPACE 000C 12 Signed 4 VFCBRSV1 RESERVED FOR FUTURE IBM USE 0010 16 Signed 2 VFCBLEN LENGTH OF FCB DATA 0012 18 Bitstring 1 VFCBINDX FCB INDEX BYTE VALUE 0013 19 Bitstring 1 * RESERVED FOR FUTURE IBM USE 0014 20 Character 260 VFCBLOAD FORMS CONTROL BUFFER DATA 0118 280 Bitstring 1 * (2) RESERVED FOR FUTURE IBM USE 011A 282 Signed 2 VFCBPGCT CURRENT PAGE COUNT 011C 284 Character 4 VFCBIBUF 'SENSE INTERMEDIATE BUFFER' INFO 0120 288 Dbl-Word 8 VFCBEND (0) END OF VFC BUFFER BLOCK 00000024 VFCBSIZE (*-VFCBK)/8 BLOCK SIZE IN DBLWDS 0014 20 Character 130 VFCBLOD1 FOR CLEARING: FCB 1ST HALF 0096 150 Character 130 VFCBLOD2 FOR CLEARING: FCB 2ND HALF 0014 20 Bitstring 256 VFCBNDAT NORMAL FCB DATA 0114 276 Character 1 VFCBENCH END-OF-FCB FENCE 0115 277 Bitstring 3 * (UNUSED PORTION OF EXTENDED FCB) 0014 20 Bitstring 1 VFCBFMT FCB FORMAT INDICATOR 0000007E VFCBXTND X'7E' EXTENDED FCB FORMAT 0015 21 Bitstring 1 VFCBFFLG FCB FLAGS ...1 .... VFCBXDUP X'10' DUPLICATE COPY ENABLED 1... .... VFCBZERO X'80' BIT ZERO MUST BE 0 BY DEFINITION 0016 22 Bitstring 1 VFCBCOPY COPY COUNT 0017 23 Bitstring 256 VFCBXDAT EXTENDED FCB: ACTUAL FCB DATA 0117 279 Bitstring 1 VFCBEOFF EXTENDED FCB END-OF-FORMS MARKER 000000FE VFCBXEOF X'FE' EXTENDED FCB END-OF-FORMS CODE 011C 284 Signed 2 VFCBFCBP CURRENT FCB POINTER 011E 286 Signed 2 VFCBCPGC CURRENT PAGE COUNTER
VFCBK Storage Layout
*** VFCBK - VIRTUAL FORMS BUFFER CONTROL BLOCK * * +---------------------------+------+------+-------------+ * 0 | VFCBNAME |:BFLAG|:BNUM | VFCBPOSN | * +------+--------------------+------+------+-------------+ * 8 |:BPRED|////////////////////| VFCBRSV1 | * +------+------+------+------+---------------------------+ * 10 | VFCBLEN |:BINDX|//////| | * +-------------+------+------+ | * 18 | | * = VFCBLOAD = * | | * +-------------+-------------+---------------------------+ * 118 |/////////////| VFCBPGCT | VFCBIBUF | * +-------------+-------------+---------------------------+ * 120 | | * = VFCBEND = * | | * +-------------------------------------------------------+ * *** VFCBK - VIRTUAL FORMS BUFFER CONTROL BLOCK *** Overlay for VFCBLOAD in VFCBK * * +---------------------------+ * ... 14 | | * +---------------------------+ | * 18 | | * = VFCBLOD1 = * | +-------------+ * | | | * +-----------------------------------------+ | * 98 | | * = VFCBLOD2 = * | | * +-------------------------------------------------------+ * 118 * *** Overlay for VFCBLOAD in VFCBK *** Overlay for VFCBLOAD in VFCBK * * +---------------------------+ * ... 14 | | * +---------------------------+ | * 18 | | * = VFCBNDAT = * | +------+--------------------+ * 110 | |:BENCH|////////////////////| * +---------------------------+------+--------------------+ * 118 * *** Overlay for VFCBLOAD in VFCBK *** Overlay for VFCBLOAD in VFCBK * * +------+------+------+------+ * 10 ... 14 |:BFMT |:BFFLG|:BCOPY| | * +---------------------------+------+------+------+ | * 18 | | * = VFCBXDAT = * | +------+ * 110 | |:BEOFF| * +------------------------------------------------+------+ * 118 * *** Overlay for VFCBLOAD in VFCBK *** Overlay for VFCBIBUF in VFCBK * * +-------------+-------------+ * 118 ... 11C | VFCBFCBP | VFCBCPGC | * +-------------+-------------+ * 120 * *** Overlay for VFCBIBUF in VFCBK
VFCBK Cross Reference
(contains links to field and bit definitions)Symbol Dspl Value -------------- ---- -----VFCBCOPY 0016
VFCBCPGC 011E
VFCBDIAG 0004 40
VFCBENCH 0114
VFCBEND 0120
VFCBEOF 0004 80
VFCBEOFF 0117
VFCBFCBP 011C
VFCBFCBV 0004 20
VFCBFFLG 0015
VFCBFLAG 0004
VFCBFMT 0014
VFCBIBUF 011C
VFCBINDX 0012
VFCBLEN 0010
VFCBLOAD 0014
VFCBLOD1 0014
VFCBLOD2 0096
VFCBNAME 0000
VFCBNDAT 0014
VFCBNUM 0005
VFCBPGCT 011A
VFCBPOSN 0006
VFCBPRED 0008
VFCBREP 0004 10
VFCBRSV1 000C
VFCBSIZE 0120 00000024
VFCBWORK 0008
VFCBXDAT 0017
VFCBXDUP 0015 10
VFCBXEOF 0117 000000FE
VFCBXTND 0014 0000007E
VFCBZERO 0015 80
Last updated on 3 Aug 1999 at 13:45:03 EDT.
Copyright IBM Corporation, 1990, 1999