Hitachi MP-1802 Technical Manual page 42

MOTOR ON
S E L E C T O
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F i g . 7 . 1 9
T i m e C h a r t
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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)
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DRQ X
X
X X X
x l m 0
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0
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TIASK
MUBI.X
DEN
SIDE I
It0T0R
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0
drive.
s e l e c t
IC6r8
FDC
$FFOO
Read
'
status
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Wirte"
corunanil register
$FFOI
Read
/
,/ Write
track
register
$FFO2
Read
,/
/
wrir"
l
sector
register
$FFO3
Read /
,/ write
data register
. , . / / n O