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Processor PCB
SI
I
S2
S3
S4
PHIO
~
~
ALE
------_/~----~\_-------------------------
I .. 200 ns .. IJOO
n~I
..... 130 ns
ADS TO AD15
_~X
AS-AI5
X~---------
IPOns
.. I
~100ns
AO TO A7
==x
VALID
X . . . . __ _
I
-
DACK
~
~
\ . . . .
------------------~!~/~-----
I
MRD/IOR
I . . .
190 ns ...
1
I . .
190 ns ..
I
\O' - _ _ _ _
--J/
MRiIOW
1 ..
19ons ..
I
~
----------~\
I~-------
TC
Il70 n~1
I . . .
170 ns ..
I
DMC
----------~\_------_/~-----
I . .
2~~~s
. 1
1
::s:
I
MAX
----
7~----------------------~\
----
Figure 2-5 D MA Timing
2-9
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