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 6.3.0 Last updated on 22 May 2013 at 13:54:27 EDT.
Copyright IBM Corporation, 1990, 2013