MULTISKAN RC and
2A
is the main elecrronics
board of the
microprocessor and inpudoutput ciP.Guits.
W
349-034
Schematic diagram
349-03-P
Component layout
NG
AND
AD
Insmctions
are
given in chapter "TESTING
AND
ADJUSTING".
U
G
None
Central processing unit is Intel's
8085AW-2.
It controls memory and
110
circuits via four
groups of signals:
I .I
Lower addressIdare bus:
ADO-AD7
Signals
ADO-ADS
are
multiplexed address
(lower
0-7
bits) and data lines. Address
signals
to
memory and
110
circuits and data
signals
to
both directions are synchronized
with
ALE.
1.2
Higher uddress bus:
A8-A15
Signals
A8415
are higher
(8-15)
bits of the
address lines to memory and
VO
circuits.
1.3
Control
bus:
RD,
R,
ALE,
CEK,
ES
(SO
and
S
1
not used)
See Table
3-4
for
signal descfiptions.
Document Release Section age
351/352-100-X 2.0
3
9
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