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INPUT/OUTPUT FUNCTIONS
25.3 -- Device Independent
lID
Functions
Btjte
7
6
5
4
3
2
1
o
<--
Bit position
v ---------------------------------
00
Error status
IOCSTA
01
02
03
04
05
06
07
08
09
OA
OB
OC
OD
10
: S : 0
I T : F :
Data buffeT'
pointer
Data
buffeT'
start address
Data bufrer
end address
Generic device word
or
CDB address
: R :
LUN
File name
or
Maximum LSN referenced
File name continued
or
M
OE
:Current segment descriptor word:
OF
10
11
12
13
File name continued
OT
Starting LSN of SDW
File name continued
or
Next logical sector number
Suffix
or
14
: Logical sector number oT 'EOF
15
16
Physical sector
number
of
file's RIB
17
; W : D : S : C : N
FMT
18
<reserved; =0)
IOCDTT - Data transFer
typ-e
IOCDB?
lOCDBS
IOCDBE
IOCGDW
IOCLUN -- Logical unit
number
IDCNAM /
IOCMLS
IOCSDW
IOCSLS
IOCLSN
IOCSUF / IOCEOF
IOCRIB
IOCFDF -
File
descrip-
tor
flags
Page
25-15
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