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Tandy 1400LT - Page 139

Tandy 1400LT
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lCheck
Pin481
'Check
IC55,
STEPG5 (Pin47
of
GATE5)
DIRECG5
(Pin46
of
GATES)
FDC37 (Pin37
of
IC54)
and
FDC39 (Pin39
of
IC54)
lof
GATE5.
I
Check
IC54
and
IC55
1
Check
IC3.
Check the STEP/
(5.
25)
signal
(Pin5
of
IC55)
1
and DIRECTION/
(5.
25)
Isignal(~in3
of
'1c55j
1
Perform
a
WRITE operation
Check WRITE DATA/ (5. 25)
signal (Pin7
of
IC55)
I
I
5-30

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