r-------------------------------------------,
DCB
Address
The
device
dependent
portion
of
the
data
control
block
varies
in
length
and
format
according
to
specifications
in
the
DSORG
and
DEVD
parameters.
Illustra-
tions
of
this
portion
for
each
device
type
are
included
in
the
description
of
the
DEVD
parameter.
+ 4
+ 8
+12
+16
~----------T--------------------------------1
I I I
+20
I
BUFNO
I
BUFCB
I
~----------L----------T---------------------1
Device
Dependent
I I I Common
+24
I
BUFL
I
DSORG
I
Interface
~---------------------L---------------------i
I I
+28
I
IOBAD
I
~----------T--------------------------------~
I BFTEK, I I
+32 I
BFALN
I
EO
DAD
I
~----------+--------------------------------i
Foundation
Block
I I I
Extension
+36 I
RECFM
I
EXLST
I
~----------L----------T---------------------i
I I I
+40 I (TIOT) I
MACRF
I
~----------T----------L---------------------1
I I I
+44
I
(IFLGS)
I
(DEB
Address)
I
Foundation
Block
~----------+--------------------------------1
I I I
+48
I (OFLGS) I
Reserved
I
~----------L--------------------------------~
I I
+52 I
Reserved
I
~-------------------------------------------i
I I
+56 I
Reserved
I
~---------------------T---------------------i
I I I
+60 I
EOEA
I PCIA I
EXCP
Interface
~---------------------+---------------------~
I I I
+64 I SIOA I
CENDA
I
~---------------------+---------------------~
I I I
+68 I
XENDA
I
Reserved
I
L
_____________________
L
_____________________
J
Figure
9.
Data
Control
Block
Format
fer
EXCP
(After
OPEN)
FOUNDATION
BLOCK
EXTENSION
AND
COMMON
INTERFACE
PARAMETERS:
EXLST=relexp
86
specifies
the
address
of
an
exit
list
that
you
have
written
for
exceptional
conditions.
The
format
of
this
exit
list
is
given
in
Appendix
D
of
the
publication
IBM
System/360
Operating
System:
Control
Program
Services.
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