15
Pin
No
.
Signal name
In/Out
Description
42
Sl3
Out
Busy signal to the printer.
43
Sl2
Out
Expansion signal
-~
During
display
:
Low
Depression of the CA (ON) key causes an instant pulse
generation
.
49
S6
Out
For DEF symbol display (engaged
:
low, not engaged: high)
54 Sl
Out
For symbol display
(SHIFT
,
DGE
,
RAD,
GRAD
,
RESERVE,
PRO, RUN)
Same waveform as the segment signal.
55
Kil
In
CPU
I
Busy signal (High during the execution in CPU
I)
(Sl6a)
56
K.i2
In
Expansion signal
To be connected to Sl 2 (CPU II) for
PC
-
1
2
11
.
57
K.i3
In
Printer Busy signal
Low when the priner
i
s
not
operated
.
58
K.i4
In
Printer connection identifying signal.
Low when the printer
is
not
connected
.
5
9
l
~
5
In
C
a
s
s
e
tte
r
e
p
ro
d
uc
t
s
ig
n
al.
60
K.i6
In
ON key input signal
1)
)
)
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