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// This file is part of the materials accompanying the book
// "The Elements of Computing Systems" by Nisan and Schocken,
// MIT Press. Book site: www.idc.ac.il/tecs
// File name: tools/builtIn/DRegister.hdl
/**
* A 16-Bit register called "D Register".
* If load[t-1]=1 then out[t] = in[t-1]
* else out does not change (out[t] = out[t-1])
*
* This built-in chip implementation has the side effect of
* providing a GUI representation of a 16-bit register
* called "D register" (typically used to store data).
*/
CHIP DRegister {
IN in[16], load;
OUT out[16];
BUILTIN DRegister;
CLOCKED in, load;
}
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