5.25” Expansion Floppy Disk Drives (FD-5)
T h e F o r m u l a - l c a n
b e
e x p a n d e d t o 2 d i s k d r i v e s b y t h e s a m e
s p e c i f i c a t i o n a s
t h e s y s t e m
f l o p p y d i s k d r i v e .
I n
t h i s c a s e ,
r e m o v e
t h e
t e r m i n a t o r f r o m t h e e x p a n s i o n f l o p p y d i s k d r i v e s .
A l l o c a t e
t o p h y s i c a l d i s k
d r i v e a d d r e s s b e c a u s e
s y s t e m
d i s k
d r i v e h a s b e e n
s e t u p
o n
See the item No.
<
F l o p p y D i s k D r i v e > a b o u t t h e
s p e c i f i c a t i o n o f 5 . 2 5 ” f l o p p y d i s k d r i v e .
P e r t a i n i n g t o t h e p i n
a s s i g n m e n t
o f
c o n n e c t o r s a n d
t h e
s i g n a l
n a m e ,
r e f e r t o b e l o w t a b l e .
S i g n a l G r o u n d
I
Expansion Floppy Disk Drives (FD-8)
T h e
F o r m u l a - l
c a n
b e
e x p a n d e d
t o 2 d i s k d r i v e s ( 8 ” )
o f
t h e
f o l l o w i n g
s p e c i f i c a t i o n .
I n t h i s c a s e ,
remove the terminator
f r o m t h e
e x p a n s i o n
f l o p p y d i s k d r i v e .
A l l o c a t e
t o
physical disk
d r i v e
a d d r e s s b e c a u s e s y s t e m d i s k d r i v e h a s b e e n
a s s i g n e d t o
The pin assignment and the signal name are on
t h e
f o l l o w i n g
page < Table 2
C o n n e c t o r S i g n a l
o f
8 ” F l o p p y
D i s k D r i v e
T y p e
o f
D i s k
8 ” t w o - s i d e d d o u b l e d e n s i t y
C a p a c i t y
b y t e s
Data Bytes/Sector
1 2 8 b y t e s / s e c t o r ( F M )
256 bytes/sector
( M F M )
S e c t o r s / T r a c k
2 6 s e c t o r s / t r a c k
C y l i n d e r s / D i s k D r i v e
7 7 c y l i n d e r s / d i s k d r i v e
T r a c k s / D i s k D r i v e
t r a c k s / d i s k d r i v e
S i g n a l G r o u n d
I
D R I V E
I
Recording Method
FM/MFM
S i g n a l Ground
12
I
13
S i g n a l Ground
14
D R I V E
15
S i g n a l Ground
16
R e c o r d i n g
D e n s i t y
3408
6816 BPI(MFM)
Track Density
4 8 T P I
Rotational Speed
360 RPM
17
S i g n a l G r o u n d
18
I
I
D a t a
T r a n s f e r R a t e
250K bits/sec(FM),
bits/sec(MFM)
19
S i g n a l Ground
20
21
S i g n a l Ground
22
WRITE
DATA
Average
of
Access Time
8 3
Average of Seek Time
9 1
23
Signal Ground
24
,
25
S i g n a l G r o u n d
26
T R A C K
I
Seek Time
3
S e t t l i n g T i m e
27
I
S i g n a l G r o u n d
I
2 8
WRITE PROTECT
Head Load Time
S i g n a l G r o u n d
I
3 0
I
I
S i g n a l G r o u n d
I
32
I
SIDE SELECT
I
33
I
S i g n a l G r o u n d
I
34
T a b l e 1
C o n n e c t o r S i g n a l o f
F l o p p y
l
D i s k D r i v e