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INPUT/OUTPUT FUNCTIONS
25.3 -- Device Independent
IIO
Functions
IOCB FLAG DESCRIPTION SUMMARY continued
Field
Name Bit
!OCFDF
FMT a-A
Content
File
-Format
000
=~
User-defined format
001
=>
Use device's default -Format for
010
=)
011
=)
100
=::>
101
=>
110
=~
i l i
=>
binary records
Memory-image Tormat
Binary record -Format
Undefined format
ASCII record Tormat
Undefined -Format
ASClI-converted-binary record
forma
t
0-7
Not used
(=0)
IOCDEN
PSN B-F
EN
a-A
0-7
25.3. 1. 1 IOCSTA
Physical sector
numbe~
($03-16)
EntTY number within sector (0-7)
Not used <=0)
Error status
The IOCSTA byte contains the return status -From
an
lID
-Function.
A zero in this byte indicates that an I/O function
completed normally without
an.Y
erTors.
A
non-zero
value
indicates
that
an
lID function encountered some sort of an
error.
The -Following table contains
all
of
the
currently
defined
values
that
can
be returned in the IOCSTA.
Along
with each value the system
s~mbol
equated to the value
(MDOS
eq,uate
file),
and
the standard error message that Ulould be
displayed iT the error message function were invoked to
show
a
message
are
given.
The
two-digit
reference
numbel"
displayed along with the error
message
should
be
used
to
locate
the
error
message's
description in Chapter 28.
It
should be noted that in order to decode the IOCSTA byte
into
the pro per err
0
r me s
5
age
I
the e
T'
roT' me s sag e Tun c t ion,
. MDER R ,
must be called with the B accumulator equal to zero.
Section
27.4 describes the error message handler.
Page
25-18
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