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INPUT/OUTPUT FUNCTIONS
IOCSTA
Value
00
01
02
03
04
05
06
07
08
09
OA
013
OC
00
OE
OF
10
11
12
13
14
1S
16
17
18
19
St}stem
Sgmbol
I$NOER
I$NODV
ISRESV
ISNORV
I$NRDY
I$IVDV
ISDUPE
I$NONM
ISCLOS
I$EOF
I$FTVP
ISDTYP
ISEOM
ISBUFO
ISCKSM
I$WRIT
I$DELT
I$RANG
I$FSPC
ISDS?C
ISSSPC
ISIDEN
I$RIB
I$DEAL
ISRECL
ISSECB
25.3 -- Device Independent I/O Functions
Standard Error Message Displayed
by . MDERR -(B=O, X=IOCB
address)
Normal return,
no error
**
28
DEVICE
NAME NOT FOUND
**
18
DEVICE
ALREADY
RESERVED
**
19 DEVICE NOT RESERVED
**
11 DEVICE NOT READY
**
31
INVALID DEVICE
**
06 DUPLICATE FILE NAME
**
04
FILE
NAME
NOT FOUND
**
20
INVALID
OPEN/CLOSED FLAG
**
21 END OF
FILE
**
14
INVALID FILE
TYPE
**
17 INVALID
DATA TRANSFER
TYPE
**
37 END OF MEDIA
**
22 BUFFER OVERFLOW
**
23 CHECKSUM ERROR
**
26 FILE IS WRITE PROTECTED
**
10 FILE IS DELETE PROTECTED
**
24
LOGICAL
SECTOR
NUMBER OUT OF
RANGE
**
41
INSUFFICIENT DISK SPACE
**
40 DIRECTORY SPACE FULL
**
42 SEGMENT DESCRIPTOR SPACE FULL
**
43
INVALID
DIRECTORY ENTRY
NO. AT
nnnn
**
32 INVALID RIB
**
44 CANNOT DEALLOCATE ALL SPACE,
DIRECTORY- ENTRY EXISTS AT
nnnn
**
45 RECORD LENGTH TOO
LARGE
**
52
SECTOR BUFFER SIZE ERROR
25.3.1.2 IOCDTT -- Data
trans~er
type
The
IOCDTT byte contains the basic
inf~rmation
about an
liD access:
whether an
input
or
an
output
transfe~
is
to
take
place,
whether
secto~
or record 1/0 is
to be
performed,
whether the file is currently open or closed, whether a
file
(diskette
only)
should
be truncated when it is closed, and
whethe~
the file or non-file format mode is to be
used.
Page
25-19
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