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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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