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