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~-------
~
946261-9701
o
o
S
F
N
1
F
UNI T SELECT (STAR)
5
X
X
1
~
INDICATES SWITCH POSITION
{
NI T SELECT 4
UNIT NUMBER
UNIT SELECT 3
ASSIGNMENT FOR
DAISY CHAIN OPERATION
UNIT SELECT 2
UNI T SELECT I
•
•
...--
...--
o
0
1
J
4
X
3
X
2
X
I
r
1
1
0
S
;:
N
5
F
c
CYL. ADD. STROBE
8
X
BIT
t
7
X
BIT 64
6
X
BIT 8
5
X
BIT ..
..
X
BIT 2
3
X
BIT 128
2
X
BIT 16
1
X
0
0
S
F
N
. .
F
READ IN SYNC.
X
8
SECT. ADD. BIT 32
SECT. ADD. BIT 32
7
X
READ IN SYNC.
ON CYL. TRUE W/SEEK ERROR
6
X
ON CYL. INDEPENDENT OF SEEK ERROR
H.S. BIT 4
5
X
DENSITY STA1\JS
DENSITY STA1\JS
X
..
H.S. BIT ..
LOGICAL ADDRESS INTERLOCK
X
3
LOGICAL ADDRESS INTERLOCK AND SEEK
ORED WI TH SEEK ERROR
ERROR MU1\JALLY INDEP.
M
H .
s .
BiT
Z
X
2
H.S. BIT 2*
M H • S. BIT 2
t
X
H. S. BIT 2M
0
M WITH HEAD SELECT SWITCHES SET TO UNINVERTED
0
S
F
~1+bO~~+~~~S
ARE NUMBERED O. I .2.3 FROM
N
2
F
WITH HEAD SELECT SWITCHES SET TO INVERTED
ADDRESS ACKNOWLEDGe: PU LSE
X
10
:g~W~;d '1-~~S
ARE NUMBERED 0 •
t
,2.3 FROM
ADDRESS ACKNOWLEDGE LEVEL
9
X
H. S. BIT 1 SELECTS THE TOP OR BOTTOM SURFACE
OF THE SELECTED DISK.
SPARE
8
X
H. S. BIT 2 IS EQUIVALENT TO D!SK SELECT.
WRITE PROTECT
X
7
**53-1 MUST BE OFF IF 51-5 IS ON.
TRACK OFFSET
6
X
R. T. Z.S. STROBED
5
X
J60
INTERRUPT 4
4
X
TERMINATOR POWER FROM UNIT.
INTERRUPT 3
3
X
J70
TERMINATOR POWER FROM CONTROLLER.
INTERRUPT 2
2
X
INTERRUPT 1
X
t
(8)137257A
ON FOR HEAD
~
ALIGNMENT ONLY
ADDRES S ACKNOWLEDGE LEVEL
ADORES S ACKNOWLEDGE PULSE
SPARE
TRACK OFFSET
WRITE PROTECT
R. T. Z. S. UNSTROBED
}
SET TO ASSIGNED UNI T
NUMBER SAME AS 51-1
THROUGH" • FOR
DAISYCHAIN OPERATION
Figure 2-40. Switches and Settings for Cabinet Mount Primary Disk Drive
2·54
Digital Systems Division
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