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Hitachi MP-1802 Technical Manual page 42

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MOTOR ON
S E L E C T O
s-ffiil
SioET
FEEi
IT6Ei
D I R € C n O i l t N
ffi
lfAo
LoAo
-tt
fl-
'l#r
7,,
v ^
l t _ .
11-
,.t#x:dffi
-l
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t t
ffi
\\
URITE oAf
lllllll
-t|:nnrr-
t [ n t t
n€Ao oAra
ililll
F i g . 7 . 1 9
T i m e C h a r t
7 - l +
I / 0 D e v i c e A d d r e s s & M e m o r v M a p
f n t h i s
m i n i f l o p p y
d i s k
s y s t e m , t h e I / O
a l l o c a t e d
a s p e r T a b l e 7 . 1 .
T h e m e n o r y
F i g . 7 . 2 0 w h e n t h e d i s k
b a s i - e M A - 5 3 2 0 i s
s o f t w a r e .
d e v i c e a d d r e s s i s
m a p i s
a s s h o w n i n
u s e d a s t h e s y s t e m
o
T a b l e 7 . 1
I / O D e v i c e A d d r e s s
l,/O device
address
cycle
d ata .b i!
D7
D6
Ds
Dr
D3
D2
Dr
Du
rc62@.
$FFO4
( MDD SE L)
Read. .
DRQ
X
X
X
X
X
x l m 0
IC6ls
Write
0
NMI
TIASK
MUBI.X
DEN
SIDE I
It0T0R
0l,i
0
drive.
s e l e c t
IC6r8
FDC
$FFOO
Read
'
status
-register
Wirte"
corunanil register
$FFOI
Read
/
,/
Write
track
register
$FFO2
Read
,/
/
wrir"
l
sector
register
$FFO3
Read /
,/
write
data register
. , . / / n O

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