Programming Interface Information: This information is NOT intended to be used as Programming Interfaces of z/VM.

#### COMBK

Prolog

Control Block Contents
COMBK DSECT

Storage Layout

Cross Reference (Contains links to field and bit definitions)

#### COMBK Prolog

     NAME       : HCPCOMBK
     DESCRIPTION: Console Communications Control Block
     DSECT      : COMBK
     FUNCTION   : Contains data and control information pertinent to the
                  control and communication between virtual and real
                  terminal console tasks and command streams.
     LOCATED BY : COMPNT  - chained
                  RDEVCON - field in HCPRDEV
     CREATED BY : HCPQCN - whenever a read or write is to be done.
                  HCPGFS - to clear the screen when switching from
                  full-screen mode to CP mode.
                  HCPGRF - for APL/TEXT translations, and
                  to clear the screen when switching from
                  full-screen mode to CP mode.
                  HCPGIN - for uppercase translation.
                  HCPTTY - to update the status area to indicate
                  ***MORE***.
                  HCPVCYSM - for VM/VTAM terminal processing.
     DELETED BY : HCPQCOET - general system routine to return COMBKs
                  to free storage.
                  HCPQCN - when a message won't be displayed on the
                  terminal screen or when a COMBK is split
                  into two or more COMBKS.
                  HCPGIN - when uppercase translation is completed.
                  HCPGRF - when APL/TEXT translation is completed.
     REFERENCES : HCPEQUAT - equate symbols
                  HCPHCCW  - host channel control word

#### COMBK Control Block Content

#### COMBK DSECT

    Hex   Dec Type/Val   Lng Label (dup)    Comments
    ---- ---- --------- ---- -------------- --------
    0000    0 Structure      COMBK          Console Communications Control
                                            Block
    0000    0 Signed       4 COMPNT         POINTER TO NEXT COMBK
    0004    4 Signed       2 COMHPARM (0)   CALLING PARMS (SEE EQUATES COPY)
    0004    4 Bitstring    1 COMBPARM       BYTE 1 OF CALLING PARMS
              ..1. ....      COMALTVM       X'20' data to be sent to an
                                            alternate user
              ...1 ....      COMREDSP       X'10' this is input redisplay
                                            data
              .... 1...      COMIOCOM       X'08' return when I/O is
                                            completed
              .... .1..      COMSCRFL       X'04' return if data can fit on
                                            current scrn
              .... ..1.      COMDIAG        X'02' this is a diagnose request
    0005    5 Bitstring    1 COMPARM        CALLING PARMS (SEE EQUATES COPY)
              1... ....      COMDROP        X'80' LOGOFF & DROP line after
                                            message
              ..1. ....      COMHIPRI       X'20' hipriority message
              ...1 ....      COMVMIO        X'10' virtual machine I/O
              .... 1...      COMHIDE        X'08' do not display the data
              .... .1..      COMNOCR        X'04' suppress automatic carriage
                                            return
              .... ..1.      COMALRM        X'02' sound the audible alarm
              .... ...1      COMCRDR        X'01' data is expected from a
                                            cardreader
              .... .1..      COMEDIT        X'04' the input line will be
                                            edited for logical line end, line
                                            delete, charactr delete, and
                                            escape characters according to
                                            the user's logical line editing
                                            character setting.
              .... ..1.      COMUPPR        X'02' translate all characters on
                                            the input line to upper case
    0006    6 Signed       2 COMTSKSZ       COMBK SIZE IN DOUBLE WORDS
    0008    8 Signed       4 COMRETN        POINTER TO SAVEAREA FOR RETURN
    000C   12 Signed       4 COMUSER        ADDRESS OF VMDBK FOR DESTINATION
                                            USER
    0010   16 Bitstring    1 COMSTAT        COMBK STATUS CONTROL FLAGS
              1... ....      COMOUTPT       X'80' OUTPUT COMBK
              .1.. ....      COMRESP        X'40' RESPONSE EXPECTED FROM THIS
                                            COMBK
              ..1. ....      COMACTV        X'20' COMBK IS ACTIVE ON REAL
                                            DEVICE
              ...1 ....      COMCNTL        X'10' THIS IS A CONTROL COMBK
                                            ONLY
              .... 1...      COMESCP        X'08' COMBK CONTAINS DEVICE
                                            DEPENDENT DATA
              .... .1..      COMLOALM       X'04' THIS COMBK HAS BEEN
                                            INHIBITED FROM BREAKING INTO FULL
                                            SCREEN MODE AND THE ALARM HAS
                                            ALREADY BEEN RUNG TO NOTIFY THE
                                            USER
              .... ..1.      COMSPLT        X'02' OUTPUT DATA BEING SPLIT
              .... ...1      COMSYNC        X'01' COMBK FOR SYNCHRONIZATION
                                            ONLY
    0011   17 Bitstring    1 COMDFLAG       DIAGNOSE DISPLAY FLAG
              000000FF       COMCNCL        255 DISPLAY - CANCEL FUNCTION
                                            REQUESTED
              000000FE       COMCLEAR       254 DISPLAY - CLEAR FUNCTION
                                            REQUESTED ERASE THE ENTIRE
                                            SCREEN, REWRITE THE ATTRIBUTE
                                            BYTES FOR CP SCREEN FORMAT, AND
                                            RESET THE CURSOR TO THE BEGINNING
                                            OF THE INPUT AREA
              1... ....      COMCLRS        X'80' DISPLAY - CLEAR SCREEN
                                            BEFORE OUTPUT
              .1.. ....      COMFSRQ        X'40' DISPLAY - FULL-SCREEN
                                            CONTROL REQUEST
              ..11 1111      COMLMSK        X'3F' DISPLAY - MASK FOR BITS IN
                                            LINE NUM
    0012   18 Bitstring    1 COMCNTRL       CONTROL FLOW FLAGS
              1... ....      COMHOLD        X'80' DISPLAY - SCREEN STATUS
                                            HOLDING
              .1.. ....      COMWRTRD       X'40' TERM - COMBK CONTAINS
                                            WRITE/READ
              ..1. ....      COMMORE        X'20' TERM - 'MORE' COMBK
              ...1 ....      COMPFWRT       X'10' TERM - ECHO WRITE COMBK
              .... 1...      COMPFDEL       X'08' TERM - PF DELAY WRITE COMBK
              .... .1..      COMEXTHC       X'04' EXTENDED COLOR AND EXTENDED
                                            HIGHLIGHTING ATTRIBUTES ARE TO BE
                                            ADDED INTO THIS COMBK
              .... ..1.      COMHIGH        X'02' HILIGHTING ATTRIBUTES ARE
                                            TO BE ADDED INTO THIS COMBK
              .... ...1      COMIMMED       X'01' IF THE USER IS IN FULL
                                            SCREEN MODE, THIS COMBK WILL
                                            BREAK IN IMMEDIATELY
    0013   19 Bitstring    1 COMLINO        DIAGNOSE DISPLAY LINE NO
    0014   20 Bitstring    1 COMWORK        TEMPORARY WORK FIELD
    0015   21 Bitstring    1 COMFLG2        MISC. FLAGS
              .... ...1      COMDBCS        X'01' DBCS output requested
              .... ..1.      COMCMND        X'02' COMMAND OUTPUT FLAG
              .... .1..      COMINITP       X'04' SEND OF INITIAL LOGON
                                            PROMPTS
              .... 1...      COMPRND        X'08' PROMPT FOLLOWED BY A READ
                                            NODISPLAY
              ...1 ....      COMLED         X'10' Limited Edit Write
                                            Requested
              ..1. ....      COMFIRST       X'20' First COMBK on RDEVCON
                                            queue
              .1.. ....      COMDOCR        X'40' Do carriage return
              1... ....      COMRPRMT       X'80' This COMBK is a read prompt
                                            for the integrated console
    0016   22 Bitstring    1 * (2)          RESERVED FOR FUTURE IBM USE
    0018   24 Signed       4 COMFSCBK       Address of FSCBK
    001C   28 Signed       4 COM1HLAD       Host logical address of 1st CCW
                                            data
    0020   32 Dbl-Word     8 COMCCW1        FIRST CONSOLE I/O CCW
    0028   40 Dbl-Word     8 COMCCW2        SECOND CONSOLE I/O CCW
    0030   48 Dbl-Word     8 COMCCW3        THIRD CONSOLE I/O CCW
    0038   56 Dbl-Word     8 COMCCW4        FOURTH CONSOLE I/O CCW
    0040   64 Dbl-Word     8 COMDEVA        Device dependent area
    0048   72 Dbl-Word     8 * (0)          ALIGNMENT
              00000009       COMSIZE        (*-COMBK)/8 COMBK HEADER SIZE IN
                                            DOUBLE WORDS
    0048   72 Character    1 COMDATA (0)    START OF VARIABLE LENGTH DATA
                 COMCCW1 REDEFINITION
    0020   32 Bitstring    1 COM1CMND       CCW COMMAND CODE *** (AT HEX
                                            DISPLACEMENT: 1)
    0021   33 Bitstring    1 COM1FLAG       CCW FLAG BITS
              1... ....      CCWDC          X'80' CHAIN DATA ADDRESS AND
                                            COUNT
              .1.. ....      CCWCC          X'40' COMMAND CHAIN
              ..1. ....      CCWSILI        X'20' SUPPRESS INCORRECT LENGTH
              ...1 ....      CCWSKIP        X'10' SUPPRESS INBOUND DATA
                                            TRANSFER
              .... 1...      CCWPCIR        X'08' REQUEST PC INTERRUPTION
              .... .1..      CCWIDA         X'04' INDIRECT DATA ADDRESSING
              .... ..11      CCWINVAL       X'03' I/O UNDEFINED PAIR OF BITS
              .... ..1.      CCWSUSPN       X'02' I/O SUSPENSION/RESUMPTION
              .... ...1      CCWUNDEF       X'01' I/O UNDEFINED BIT
    0022   34 Signed       2 COM1CNT        CCW DATA COUNT
    0024   36 Address      4 COM1ADDR       CCW DATA ADDRESS
              00000027       COM1ADRX       *-1 CCW FINAL BYTE OF ADDRESS
    0028   40 Dbl-Word     8 COM1NEXT (0)   CCW FOLLOWING CURRENT CCW
              0000000F       COMWIS         B'1111' ICM/STCM MASK FOR 31 BIT
                                            ADDRESS
              00000004       COMWMC         04 MVC/CLC LENGTH FOR 31 BIT
                                            ADDRESS
              00000080       COMWIDAL       B'10000000' IDAL INVALID BIT MASK
              00000008       COMWLEN        8 LENGTH OF A SINGLE CCW (8
                                            BYTES)
                 REDEFINITION - CLASTERM DEVICES
    0040   64 Dbl-Word     8 COMCCW5        Additional CCW for start/stop
                                            devices
                 REDEFINITION - CLASGRAF DEVICES
    0040   64 Bitstring    1 * (3)          RESERVED FOR FUTURE IBM USE
    0043   67 Bitstring    1 COMRCMD        3270 COMMAND CHARACTER
    0044   68 Bitstring    1 COMRWCC        3270 WRITE CONTROL CHARACTER
    0045   69 Bitstring    1 COMRSBA        3270 'SBA' ORDER CHARACTER
    0046   70 Signed       2 COMBUFA        3270 BUFFER ADDRESS CHARACTERS
                 REDEFINITION OF COMBUFA
    0046   70 Bitstring    1 COMBUFAD       BUFFER ADDRESS
    0047   71 Bitstring    1 COMBUFLC       LOCATION ON THE HEADER

#### COMBK Storage Layout

    *** COMBK - Console Communications Control Block
    *
    *     +---------------------------+------+------+-------------+
    *   0 |          COMPNT           |:BPARM|:PARM |  COMTSKSZ   |
    *     +---------------------------+------+------+-------------+
    *   8 |         COMRETN           |         COMUSER           |
    *     +------+------+------+------+------+------+-------------+
    *  10 |:STAT |:DFLAG|:CNTRL|:LINO |:WORK |:FLG2 |/////////////|
    *     +------+------+------+------+------+------+-------------+
    *  18 |         COMFSCBK          |         COM1HLAD          |
    *     +---------------------------+---------------------------+
    *  20 |                       COMCCW1                         |
    *     +-------------------------------------------------------+
    *  28 |                       COMCCW2                         |
    *     +-------------------------------------------------------+
    *  30 |                       COMCCW3                         |
    *     +-------------------------------------------------------+
    *  38 |                       COMCCW4                         |
    *     +-------------------------------------------------------+
    *  40 |                       COMDEVA                         |
    *     +-------------------------------------------------------+
    *
    *** COMBK - Console Communications Control Block

    *** Overlay for COMCCW1 in COMBK
    *
    *     +------+------+-------------+---------------------------+
    *  20 |:1CMND|:1FLAG|  COM1CNT    |         COM1ADDR          |
    *     +------+------+-------------+---------------------------+
    *
    *** Overlay for COMCCW1 in COMBK

    *** Overlay for COMDEVA in COMBK
    *
    *     +-------------------------------------------------------+
    *  40 |                       COMCCW5                         |
    *     +-------------------------------------------------------+
    *  48
    *
    *** Overlay for COMDEVA in COMBK

    *** Overlay for COMDEVA in COMBK
    *
    *     +--------------------+------+------+------+-------------+
    *  40 |////////////////////|:RCMD |:RWCC |:RSBA |  COMBUFA    |
    *     +--------------------+------+------+------+-------------+
    *  48
    *
    *** Overlay for COMDEVA in COMBK

    *** Overlay for COMBUFA in COMBK
    *
    *                                               +------+------+
    *  40 ...                                    46 |:BUFAD|:BUFLC|
    *                                               +------+------+
    *  48
    *
    *** Overlay for COMBUFA in COMBK

#### COMBK Cross Reference

    Symbol         Dspl Value
    -------------- ---- -----
    CCWCC          0021 40
    CCWDC          0021 80
    CCWIDA         0021 04
    CCWINVAL       0021 03
    CCWPCIR        0021 08
    CCWSILI        0021 20
    CCWSKIP        0021 10
    CCWSUSPN       0021 02
    CCWUNDEF       0021 01
    COMACTV        0010 20
    COMALRM        0005 02
    COMALTVM       0004 20
    COMBPARM       0004
    COMBUFA        0046
    COMBUFAD       0046
    COMBUFLC       0047
    COMCCW1        0020
    COMCCW2        0028
    COMCCW3        0030
    COMCCW4        0038
    COMCCW5        0040
    COMCLEAR       0011 000000FE
    COMCLRS        0011 80
    COMCMND        0015 02
    COMCNCL        0011 000000FF
    COMCNTL        0010 10
    COMCNTRL       0012
    COMCRDR        0005 01
    COMDATA        0048
    COMDBCS        0015 01
    COMDEVA        0040
    COMDFLAG       0011
    COMDIAG        0004 02
    COMDOCR        0015 40
    COMDROP        0005 80
    COMEDIT        0005 04
    COMESCP        0010 08
    COMEXTHC       0012 04
    COMFIRST       0015 20
    COMFLG2        0015
    COMFSCBK       0018
    COMFSRQ        0011 40
    COMHIDE        0005 08
    COMHIGH        0012 02
    COMHIPRI       0005 20
    COMHOLD        0012 80
    COMHPARM       0004
    COMIMMED       0012 01
    COMINITP       0015 04
    COMIOCOM       0004 08
    COMLED         0015 10
    COMLINO        0013
    COMLMSK        0011 3F
    COMLOALM       0010 04
    COMMORE        0012 20
    COMNOCR        0005 04
    COMOUTPT       0010 80
    COMPARM        0005
    COMPFDEL       0012 08
    COMPFWRT       0012 10
    COMPNT         0000
    COMPRND        0015 08
    COMRCMD        0043
    COMREDSP       0004 10
    COMRESP        0010 40
    COMRETN        0008
    COMRPRMT       0015 80
    COMRSBA        0045
    COMRWCC        0044
    COMSCRFL       0004 04
    COMSIZE        0048 00000009
    COMSPLT        0010 02
    COMSTAT        0010
    COMSYNC        0010 01
    COMTSKSZ       0006
    COMUPPR        0005 02
    COMUSER        000C
    COMVMIO        0005 10
    COMWIDAL       0028 00000080
    COMWIS         0028 0000000F
    COMWLEN        0028 00000008
    COMWMC         0028 00000004
    COMWORK        0014
    COMWRTRD       0012 40
    COM1ADDR       0024
    COM1ADRX       0024 00000027
    COM1CMND       0020
    COM1CNT        0022
    COM1FLAG       0021
    COM1HLAD       001C
    COM1NEXT       0028

This information is based on z/VM V5R2.0. Last updated on 12 Apr 2006 at 16:45:17 EDT.
Copyright IBM Corporation, 1990, 2005