& D$ j* c8 z3 ], J# z: V- 74xx00 +-v--+
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4 K2 K* e( ?! V1 d/ \ - | | | |6 T6 g& ~2 Q2 h/ Z" v4 e
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$ [2 V& }* S6 i+ }) w - NC |6 9|--- CPU PHI2: S/ i! v7 u/ a* y; x! [
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# y$ U% I/ U3 \. f4 ] - GND ---|7 8|--- 74xx161 CK" Q) d& G8 R# s1 V7 r
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