Add solutions for part 1

projects/08/ProgramFlow/BasicLoop/BasicLoop.asm

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+// push constant 0
+@0
+D = A
+@SP
+A = M
+M = D
+@SP
+M = M + 1
+
+// pop local 0
+@0
+D = A
+@LCL
+A = M
+D = D + A
+@R13
+M = D
+// ^ R13 = local + index
+@SP
+A = M
+A = A - 1
+D = M
+@SP
+M = M - 1
+// ^ pop into D
+@R13
+A = M
+M = D
+// ^ *R13 = D
+
+// label LOOP_START
+(LOOP_START)
+
+// push argument 0
+@0
+D = A
+@ARG
+A = M
+A = D + A
+D = M
+// ^ D = *(LCL + index)
+@SP
+A = M
+M = D
+@SP
+M = M + 1
+// ^ push D
+
+// push local 0
+@0
+D = A
+@LCL
+A = M
+A = D + A
+D = M
+// ^ D = *(LCL + index)
+@SP
+A = M
+M = D
+@SP
+M = M + 1
+// ^ push D
+
+// add
+@SP
+A = M
+A = A - 1
+A = A - 1
+D = M
+A = A + 1
+D = D + M
+A = A - 1
+M = D
+@SP
+M = M - 1
+
+// pop local 0
+@0
+D = A
+@LCL
+A = M
+D = D + A
+@R13
+M = D
+// ^ R13 = local + index
+@SP
+A = M
+A = A - 1
+D = M
+@SP
+M = M - 1
+// ^ pop into D
+@R13
+A = M
+M = D
+// ^ *R13 = D
+
+// push argument 0
+@0
+D = A
+@ARG
+A = M
+A = D + A
+D = M
+// ^ D = *(LCL + index)
+@SP
+A = M
+M = D
+@SP
+M = M + 1
+// ^ push D
+
+// push constant 1
+@1
+D = A
+@SP
+A = M
+M = D
+@SP
+M = M + 1
+
+// sub
+@SP
+A = M
+A = A - 1
+A = A - 1
+D = M
+A = A + 1
+D = D - M
+A = A - 1
+M = D
+@SP
+M = M - 1
+
+// pop argument 0
+@0
+D = A
+@ARG
+A = M
+D = D + A
+@R13
+M = D
+// ^ R13 = argument + index
+@SP
+A = M
+A = A - 1
+D = M
+@SP
+M = M - 1
+// ^ pop into D
+@R13
+A = M
+M = D
+// ^ *R13 = D
+
+// push argument 0
+@0
+D = A
+@ARG
+A = M
+A = D + A
+D = M
+// ^ D = *(LCL + index)
+@SP
+A = M
+M = D
+@SP
+M = M + 1
+// ^ push D
+
+// if-goto LOOP_START
+@SP
+A = M
+A = A - 1
+D = M
+@SP
+M = M - 1
+@LOOP_START
+D;JNE
+// push local 0
+@0
+D = A
+@LCL
+A = M
+A = D + A
+D = M
+// ^ D = *(LCL + index)
+@SP
+A = M
+M = D
+@SP
+M = M + 1
+// ^ push D
+

projects/08/ProgramFlow/BasicLoop/BasicLoop.cmp

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+| RAM[0] |RAM[256]|
+|    257 |      6 |

projects/08/ProgramFlow/BasicLoop/BasicLoop.tst

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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/08/ProgramFlow/BasicLoop/BasicLoop.tst
+
+load BasicLoop.asm,
+output-file BasicLoop.out,
+compare-to BasicLoop.cmp,
+output-list RAM[0]%D1.6.1 RAM[256]%D1.6.1;
+
+set RAM[0] 256,
+set RAM[1] 300,
+set RAM[2] 400,
+set RAM[400] 3,
+
+repeat 600 {
+  ticktock;
+}
+
+output;

projects/08/ProgramFlow/BasicLoop/BasicLoop.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/08/ProgramFlow/BasicLoop/BasicLoop.vm
+
+// Computes the sum 1 + 2 + ... + argument[0] and pushes the 
+// result onto the stack. Argument[0] is initialized by the test 
+// script before this code starts running.
+push constant 0    
+pop local 0         // initializes sum = 0
+label LOOP_START
+push argument 0    
+push local 0
+add
+pop local 0	        // sum = sum + counter
+push argument 0
+push constant 1
+sub
+pop argument 0      // counter--
+push argument 0
+if-goto LOOP_START  // If counter > 0, goto LOOP_START
+push local 0

projects/08/ProgramFlow/BasicLoop/BasicLoopVME.tst

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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/08/ProgramFlow/BasicLoop/BasicLoopVME.tst
+
+load BasicLoop.vm,
+output-file BasicLoop.out,
+compare-to BasicLoop.cmp,
+output-list RAM[0]%D1.6.1 RAM[256]%D1.6.1;
+
+set sp 256,
+set local 300,
+set argument 400,
+set argument[0] 3,
+
+repeat 33 {
+  vmstep;
+}
+
+output;