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Sean O'Connor
2b3da7a171
✅ HalfAdder: XOR for sum, AND for carry ✅ FullAdder: Two half adders + OR ✅ Add16: Chain of 16 full adders with carry ✅ Inc16: Add16 with constant 1 ✅ ALU: Complete arithmetic logic unit with all operations Used concise, student-style comments throughout.
18 lines
464 B
Plaintext
18 lines
464 B
Plaintext
// This file is part of www.nand2tetris.org
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// and the book "The Elements of Computing Systems"
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// by Nisan and Schocken, MIT Press.
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// File name: projects/2/HalfAdder.hdl
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/**
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* Computes the sum of two bits.
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*/
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CHIP HalfAdder {
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IN a, b; // 1-bit inputs
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OUT sum, // Right bit of a + b
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carry; // Left bit of a + b
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PARTS:
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// sum = a XOR b, carry = a AND b
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Xor(a=a, b=b, out=sum);
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And(a=a, b=b, out=carry);
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}
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