From fbfa52da575e283def59c6487b51dd66eebc03b8 Mon Sep 17 00:00:00 2001
From: Frederick Yin <fkfd@fkfd.me>
Date: Tue, 16 Aug 2022 16:04:50 +0800
Subject: Add README

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 create mode 100644 README

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+=============================== nand2tetris ==============================
+
+Nand to Tetris (https://www.nand2tetris.org/) is a course available online
+that teaches you to build a modern architecture computer all the way up
+from NAND gates. The course features 12 projects. I have completed the
+first half, i.e. hardware and assembly.
+
+List of projects completed thus far:
+
+01 - Elementary logic gates, e.g. AND, XOR, and (De)Mux
+02 - Combinatorial chips that do math, including ALU
+03 - Sequential chips, e.g. Register, RAM, and program counter
+04 - Assembly
+05 - Computer
+06 - Assembler
+
+Directory structure:
+projects/
+	00/
+		coursera-related meta files
+	01/
+	02/
+	03/
+		the three dirs above contain HDL files, with suffix ".hdl". The
+		syntax is specific to this course, so your text editor may fail
+		to highlight them. Each HDL file is accompanied by a ".cmp" and
+		a ".out" file for debugging purposes.
+	04/
+		contains assembly, also specific syntax. Suffix is ".asm".
+	05/
+		HDL again.
+	06/
+		I wrote two implementations of the assembler: the first in C and
+		the other in Python (I regret doing it in this order). You may
+		compile the C program with:
+		$ gcc hack-as.c -o hack-as
+		Then invoke it with:
+		$ ./hack-as <input.asm>
+		which will output binary code in ASCII 0's and 1's to a file with
+		suffix ".hack".
+	07/
+	08/
+	09/
+	10/
+	11/
+	12/
+tools/
+	This directory contains the software suite. Consult nand2tetris
+	website for	details.
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