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Singer 40 - Detailed Six-Character Disc Address Format

Singer 40
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Instruction
Format
Only
the
numeric
portions
(1-4)
of
each
character
are
used
for
specifying
this
information.
Bit
7
may
be
either
0
or
1;
bit
5
must
always
be
1.
The
informa-
tion
is
specified
as
follows:
I
CHARACTER
1
\(&3
!
4
5 6
Bit
D
A T T
S S 4
D
A T T
S
S
3
D
A
T
T
S
S
2
D
T
T
T
S S 1
(2)DEVICE
NUMBER
(0-9)
r0
HUNDREDS
DIGIT
(0
or
1)
OF
A
L.:..I
THREE
DIGIT
TRACK
NUMBER
f5\
TENS
DIGIT
(0-9)
OF
A TWO
L./DIGIT
SECTOR
NUMBER
~
TENS
DIGIT
(0-9)
OF
A
THREE
~DIGIT
TRACK
NUMBER
r0
UNITS
DIGIT
(0-9)
OF
A
THREE
l!IDIGIT
TRACK
NUMBER
NOTE:
f6\ UNITS
DIGIT
(0-9)
OF
A TWO
L.iDIGIT
SECTOR
NUMBER
[0ARM
NUMBER
(0-4)
•
The
bits
in
characters
1,3,4,5,
and
6
have
the
following
values:
Bit
1
has
the
value
1
when
it
is
ON.
Bit
2
has
the
value
2
when
it
is
ON.
Bit
3
has
the
value
4
when
it
is
ON.
Bit
4
has
the
value
8
when
it
is
ON.
•
The
bits
in
character
2
have
the
following
values:
Bit
1
has
the
value
1
when
it
is
ON.
Bit
2
has
the
value
1
when
it
is
ON.
Bit
3
has
the
value
2
when
it
is
ON.
Bit
4
has
the
value
4
when
it
is
ON.
Figure
3-1.
Six-Character
Disc
AddreSS
3
-2
Models
40
and
42
Reference
Manual
1/72

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