Advertisement
INPUT/OUTPUT FUNCTIONS
25.3 -- Device Independent
liD
Functions
loeDSP
is
indete~minate.
IOCNAM is unchanged
i~
the device type
is
not
DK.
If
the device type is DK,
then
IOCNAM will have
been
replaced
with the
rou~
ent~ies
IOCMLS,
IOCSDW.
IOCSLS
and
IOCLSN.
IOCMLS
contains the value
$FFFF
if
the
device type is OK.
IOCSDW
contains
the
first
SDW
from the
rile's RIB
if
the device type is OK.
IOCSLS
contains the value
$FFFF
if
the
device
type
.!
-
'I'"''
J.!:»
lJf"\.
IOCLSN
contains
the
value
ze~o
ir the
device type is DK.
IOCSUF
is unchanged if the device type is
not
DK.
If
the device type
is
DK,
then
IaCSUF
will have
been
replaced
with the
rOCEOF
entr~.
!OCEOF
contains the logical sector number
of the
logical
end-of-file
if
the
device type is
DK.
IOCRIB
contains
the
physical
sector
numbe~
of
the
file's
RIB
if
the
device type is
DK.
!OCDEN
contains
the
ent~~
number if the
OK.
file's
device
director'J
type
is
IOCFDF
contains
the
FDF
field from the
di~ectory
entry or the
FDR
(if
open
mode
is
input or update to existing
f i
1 e).
Oth erUli sel
th e
IOCFDF
fie 1 d
contains
its initial value;
hOtileVerl
ir
the
initial
FMT
bits
contained
a
.1
1 .. ,
FMT
til
i
11
h a ve
b
e en c
han
g edt
0
e
i
the T' a "3
II
0,..
a
ii
7
i i
as des c
l'
i
bed
i
n
section 25.3.1. 16.
IoeSBP
contains the value
Or
zero
ir
the
d e vic e t
y
p e
i
s OK.
IOCSEI
contains the value in
IOCSBE.
The remaindeT' of the IOCB is unchanged.
"-
\
. .J
Page
25-38
Advertisement
