From d3a0cc3a8ba6dfeb64d3faeffdeb6845b60e5840 Mon Sep 17 00:00:00 2001 From: Yuchen Pei Date: Sat, 20 Jan 2018 15:41:49 +0100 Subject: rearranged the dir for github - removed tools and pdfs - rearranged the projects dirs - added md files - other minor changes --- chips/RAM512.hdl | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) create mode 100644 chips/RAM512.hdl (limited to 'chips/RAM512.hdl') diff --git a/chips/RAM512.hdl b/chips/RAM512.hdl new file mode 100644 index 0000000..55f6ea0 --- /dev/null +++ b/chips/RAM512.hdl @@ -0,0 +1,29 @@ +// 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: projects/03/b/RAM512.hdl + +/** + * Memory of 512 registers, each 16 bit-wide. Out holds the value + * stored at the memory location specified by address. If load==1, then + * the in value is loaded into the memory location specified by address + * (the loaded value will be emitted to out from the next time step onward). + */ + +CHIP RAM512 { + IN in[16], load, address[9]; + OUT out[16]; + + PARTS: + // Put your code here: + DMux8Way (in=load, sel=address[0..2], a=load0, b=load1, c=load2, d=load3, e=load4, f=load5, g=load6, h=load7); + RAM64 (in=in, load=load0, address=address[3..8], out=out0); + RAM64 (in=in, load=load1, address=address[3..8], out=out1); + RAM64 (in=in, load=load2, address=address[3..8], out=out2); + RAM64 (in=in, load=load3, address=address[3..8], out=out3); + RAM64 (in=in, load=load4, address=address[3..8], out=out4); + RAM64 (in=in, load=load5, address=address[3..8], out=out5); + RAM64 (in=in, load=load6, address=address[3..8], out=out6); + RAM64 (in=in, load=load7, address=address[3..8], out=out7); + Mux8Way16 (a=out0, b=out1, c=out2, d=out3, e=out4, f=out5, g=out6, h=out7, sel=address[0..2], out=out); +} -- cgit v1.2.3