project07 - add project files

07/MemoryAccess/PointerTest/PointerTest.vm

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+// This file is part of www.nand2tetris.org
+// and the book "The Elements of Computing Systems"
+// by Nisan and Schocken, MIT Press.
+// File name: projects/7/MemoryAccess/PointerTest/PointerTest.vm
+
+// Executes pop and push commands using the 
+// pointer, this, and that segments.
+
+push constant 3030
+pop pointer 0
+push constant 3040
+pop pointer 1
+push constant 32
+pop this 2
+push constant 46
+pop that 6
+push pointer 0
+push pointer 1
+add
+push this 2
+sub
+push that 6
+add