25 lines
626 B
Plaintext
25 lines
626 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: tools/builtIn/ARegister.hdl
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/**
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* A 16-Bit register called "A Register".
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* If load[t-1]=1 then out[t] = in[t-1]
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* else out does not change (out[t] = out[t-1])
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*
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* This built-in chip implementation has the side effect of
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* providing a GUI representation of a 16-bit register
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* called "A register" (typically used to store an address).
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*/
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CHIP ARegister {
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IN in[16], load;
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OUT out[16];
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BUILTIN ARegister;
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CLOCKED in, load;
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}
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