FMASK | Back to Index page

| Prolog Control Block Contents FMASK DSECT Storage Layout Cross Reference (Contains links to field and bit definitions) |
Programming Interface Information: This information is NOT intended to be used as Programming Interfaces of z/VM.

FMASK Prolog | Top of page

     NAME       : HCPFCWDS
     DESCRIPTION: File Mask Equates
     DSECT      : FMASK

FMASK Control Block Content | Top of page

     FMASK DSECT
    Top of page

    Hex   Dec Type/Val   Lng Label (dup)    Comments
    ---- ---- --------- ---- -------------- --------
    0000    0 Structure      FMASK          File Mask Equates
    0000    0 Bitstring    1 FMBYTE         The file mask
              11.. ....      FMWRITES       X'C0' FMWRITES Bits that control
                                            writes
              1... ....      FMUWRITE       X'80' FMUWRITE Allow update
                                            writes
              ..1. .11.      FMMUSTB0       X'26' FMMUSTB0 These bits must be
                                            0 for ECKD devices
              ..11 1111      FMMB0FBA       X'3F' FMMB0FBA These bits must be
                                            0 for FBA devices
              ...1 ....      FMSEEKNA       X'10' FMSEEKNA When the bit is
                                            one, SEEK and Multitrack
                                            disallowed
              .... ...1      FMRO           X'01' FMRO Inhibit all WRITEs

FMASK Storage Layout | Top of page

    *** FMASK - File Mask Equates
    *
    *     +------+
    *   0 |FMBYTE| 1
    *     +------+
    *
    *** FMASK - File Mask Equates

FMASK Cross Reference | Top of page

    Symbol         Dspl Value
    -------------- ---- -----
    FMBYTE         0000
    FMMB0FBA       0000 3F
    FMMUSTB0       0000 26
    FMRO           0000 01
    FMSEEKNA       0000 10
    FMUWRITE       0000 80
    FMWRITES       0000 C0

This information is based on z/VM 7.2.0 Last updated on 24 Jun 2020 at 09:28:12 EDT.
Copyright IBM Corporation, 1990, 2020