IBM 2025 Maintenance Manual page 217

Processing unit
Table of Contents

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-+J
A
j.--
Direct Control Bus Out
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(Data from Storage 8 Bits)
+.---!,-------------
(Static Signals)
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_____
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-------------
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f----
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i--c
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Write Out (Pulse)
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.. 1.
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p
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Timing Signal Bus Out
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(Bits 8-15 of instruction)
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(Pulses)
Read Out
(Pulse)
A. B.
C.
D. E. f. G
H.J. K
L. M. N
B. D
F. D
s
u
T
P.
Q.
R
Figure 4-15 ..
4-16 (7/69)
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1~ I
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y
N
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~
Maximum transition time is
200
nsec.
Minimum duration is
500
nsec.
Maximum including transition.
100
ns.
Leading edges coincidental within skew tolerances
Leading edges coincidental within skew tolerances
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·'
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. .
,
Overlap start Write Out to change D.
C.
P. O.
100
nsec. (MIN)
Overlap change of D.
C.
P. 0 to finish of Write Out
100
nsec. (Ml N)
Earliest time to sample hold I ine during read direct.
Minimum down time between pulses is
500
nsec.
Direct Control Signals Originating within the CPU

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