INTERFACE COMMANDS
7 – 6
Set Feature Commands
Set Features Mode
Enables or disables features supported by the drive. When the drive receives this command it:
1. Sets BSY,
2. Checks the contents of the Features register,
3. Clears BSY and
4. Generates an interrupt.
If the value of the register is not a feature supported by the drive, the command is aborted.
The acceptable values in the Features register are defined as follows:
E
U
L
A
V
N
O
I
T
P
I
R
C
S
E
D
*
h
2
0
e
h
c
a
c
e
ti
r
w
d
e
l
b
a
n
E
h
3
0
r
e
t
s
i
g
e
r
t
n
u
o
C
r
o
t
c
e
S
n
i
e
u
l
a
v
n
o
d
e
s
a
b
e
d
o
m
r
e
f
s
n
a
rt
t
e
S
h
4
4
e
h
t
n
i
d
e
if
i
c
e
p
s
s
d
n
a
m
m
o
c
g
n
o
L
e
ti
r
W
/
g
n
o
L
d
a
e
R
n
o
d
e
d
n
e
p
p
a
a
t
a
d
f
o
h
t
g
n
e
L
n
o
it
a
m
r
o
f
n
i
e
c
i
v
e
D
y
fi
t
n
e
d
I
h
5
5
e
r
u
t
a
e
f
d
a
e
h
a
-
k
o
o
l
d
a
e
r
e
l
b
a
s
i
D
*
h
6
6
s
tl
u
a
f
e
d
n
o
-r
e
w
o
p
o
t
g
n
it
r
e
v
e
r
e
l
b
a
s
i
D
h
2
8
e
h
c
a
c
e
ti
r
w
e
l
b
a
s
i
D
*
h
A
A
e
r
u
t
a
e
f
d
a
e
h
a
-
k
o
o
l
d
a
e
r
e
l
b
a
n
E
*
h
B
B
s
d
n
a
m
m
o
c
g
n
o
L
e
ti
r
W
/
g
n
o
L
d
a
e
R
n
o
d
e
d
n
e
p
p
a
a
t
a
d
c
if
i
c
e
p
s
r
o
t
x
a
M
f
o
s
e
t
y
b
4
h
C
C
s
tl
u
a
f
e
d
n
o
-r
e
w
o
p
o
t
g
n
it
r
e
v
e
r
e
l
b
a
n
E
*
.t
l
u
a
f
e
d
y
b
p
u
r
e
w
o
p
t
a
d
e
l
b
a
n
E
