FMASK - 32-bit CP - V4R4.0

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

#### FMASK

Prolog

Control Block Contents
FMASK DSECT

Storage Layout

Cross Reference (Contains links to field and bit definitions)

#### FMASK Prolog

     NAME       : HCPFCWDS
     DESCRIPTION: File Mask Equates
     DSECT      : FMASK

#### FMASK Control Block Content

#### FMASK DSECT

    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' Bits that control writes
              1... ....      FMUWRITE       X'80' Allow update writes
              ..1. .11.      FMMUSTB0       X'26' These bits must be 0 for
                                            ECKD devices
              ..11 1111      FMMB0FBA       X'3F' These bits must be 0 for
                                            FBA devices
              ...1 ....      FMSEEKNA       X'10' When the bit is one, SEEK
                                            and Multitrack disallowed

#### FMASK Storage Layout

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

#### FMASK Cross Reference

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

This information is based on z/VM V4R4.0. Last updated on 29 Jul 2003 at 15:34:40 EDT.
Copyright IBM Corporation, 1990, 2003