| U1 | RB | LNCPU GP Register Connector (Type B) |
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| U2 | RC | LNCPU GP Register Connector (Type B) |
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| U3 | RD | LNCPU GP Register Connector (Type B) |
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| U4 | 74HC138 | 3-to-8 line decoder/multiplexer inverting, DIP-16/SOIC-16/SSOP-16 |
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| U5 | LNCPU ALU Operand Selector | LNCPU ALU Operand Selector |
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| U6 | 74LS08 | Quad And2 |
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| U7 | 74LS32 | Quad 2-input OR |
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| U8 | LNCPU ALU | LNCPU ALU |
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| U9 | RA | LNCPU Shift Register |
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| U10 | LNCPU FLAGS Register | LNCPU Type B Connector (select footprint for socket or header) |
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| U11 | LNCPU RAM | LNCPU Type A Connector (select footprint for socket or header) |
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| U12 | LNCPU ROM | LNCPU Type A Connector (select footprint for socket or header) |
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