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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
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