Tandy 6000 Service Manual page 371

C onnecto r
P I
34-P in
R ib b o n
D aisy
C hain
'
r
P I
P2
20-P in
R ib b o n
R adial
P2
P3
t
R adial
P3
N O T E S :
1. S - Single Ended
2. D - D iffe re n tia l
3 . 1 = D rive In p u t
4. O = D rive O u tp u t
TABLE 3-1
DRIVE INTERFACE SIGNALS AND PIN ASSIGNMENTS
Interface
P in N um b er
G round
Signal
2
(1)
4 (3)
6 (5)
8
(7)
10 (9)
(H )
12
14 (13)
16 (15)
(17)
18
20 (19)
(21)
22
(23)
24
(25)
26
(27)
28
30 (29)
32 (31)
34 (33)
1
(2)
3
(4)
5
(6)
7
(8)
9
(10)
11 (12)
13
—
14
—
15
(16)
17
18
—
19 (20)
1
2
3
4
Signal Type I / O
S I
s
I
s
I
s o
s o
s o
s
I
—
—
s
I
s o
s o
s
I
s
I
s
I
s
I
s
I
s
I
s o
s
—
—
—
— —
— —
—
—
D I
D
I
—
—
o
D
0
D
—
—
_
—
—
—
3-5
Nam e o f Signal
Spare
Head Select 22
W rite Gate
Seek C om plete
T ra ck 0
F a u lt
H ead Select 2°
Reserved (T o J2 - 7)
H ead Select 2 1
Ind ex
Ready
Step
D rive Select 0
D riv e Select 1
D riv e Select 2
D riv e Select 3
D ire c tio n In
D riv e Select
Spare
Reserved
Reserved (T o J l-1 6 )
Spare
G ro u n d
+ W rite D a ta
- W rite D a ta
G ro u n d
+ Read D ata
Read D a ta
-
G ro u n d
+
12 vo lts D . C . In
+
12 volts D . C . R eturn
+ 5 vo lts D . C . R e tu rn
+ 5 vo lts D . C . In