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INPUT/OUTPUT PROVISIONS
26.2 -- Device Independent I/O
cnB FLAG DESCRIPTION SUMMARY
Field
Name Bit
-----
CDBDDF
R
7
0
6
I
5
F
4
W
3
5
2
L
1
D
o
CDBVDT
N
7
3-6
B
2
0-1
Content
Reservable device flag
o
=>
Not reservable
1
=>
Rese,.vable
Output device flag
o
=>
Cannot perform output
1
=>
Can perform output'
Input device flag
o
=)
Cannot perform input
1
=>
Can
per~orm
input
File-type device flag
o
=~
Cannot open/close riles
1
=)
Can open/close files
Rewindable device flag
o
=>
Cannot.rewind files
1
=>
Can rewind files
System console flag
o
=>
Not system console device
1
=)
System console device
Logical sector lID flag
o
=)
Cannot perform logical sector
1/0
1
=)
Can perform logical sector I/O
Default binary record format flag
o
=>
Binary record is default binary
format
1
=>
ASClI-converted-binary record is
default binary format
Non-file format flag
0
=>
Non-file format mode is invalid
1
=)
Non-file format mode is valid
Not used
(=0)
Binary
110
flag
0
=)
Eight-bit data is invalid
1
=>
Eight-bit data is valid
Not used
(=0)
Page
26-03
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