.

projects/04/mult/Mult.asm

@@ -0,0 +1,24 @@
+@R2
+M=0
+@sum
+M=0
+(LOOP)
+@1
+D=M
+@END
+D;JEQ 	// if R1==0 goto end
+@R0
+D=M    	// D=R0
+@sum
+M=M+D  	// sum=sum+R0
+@R1
+M=M-1	//R1=R1-1
+@sum
+D=M
+@R2
+M=D
+@LOOP
+0;JMP
+(END)
+@END
+0;JMP

projects/04/mult/Mult.cmp

@@ -0,0 +1,7 @@
+|  RAM[0]  |  RAM[1]  |  RAM[2]  |
+|       0  |       0  |       0  |
+|       1  |       0  |       0  |
+|       0  |       2  |       0  |
+|       3  |       1  |       3  |
+|       2  |       4  |       8  |
+|       6  |       7  |      42  |

projects/04/mult/Mult.tst

@@ -0,0 +1,74 @@
+// 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/04/mult/Mult.tst
+
+load Mult.asm,
+output-file Mult.out,
+compare-to Mult.cmp,
+output-list RAM[0]%D2.6.2 RAM[1]%D2.6.2 RAM[2]%D2.6.2;
+
+set RAM[0] 0,   // Set test arguments
+set RAM[1] 0,
+set RAM[2] -1;  // Test that program initialized product to 0
+repeat 20 {
+  ticktock;
+}
+set RAM[0] 0,   // Restore arguments in case program used them as loop counter
+set RAM[1] 0,
+output;
+
+set PC 0,
+set RAM[0] 1,   // Set test arguments
+set RAM[1] 0,
+set RAM[2] -1;  // Ensure that program initialized product to 0
+repeat 50 {
+  ticktock;
+}
+set RAM[0] 1,   // Restore arguments in case program used them as loop counter
+set RAM[1] 0,
+output;
+
+set PC 0,
+set RAM[0] 0,   // Set test arguments
+set RAM[1] 2,
+set RAM[2] -1;  // Ensure that program initialized product to 0
+repeat 80 {
+  ticktock;
+}
+set RAM[0] 0,   // Restore arguments in case program used them as loop counter
+set RAM[1] 2,
+output;
+
+set PC 0,
+set RAM[0] 3,   // Set test arguments
+set RAM[1] 1,
+set RAM[2] -1;  // Ensure that program initialized product to 0
+repeat 120 {
+  ticktock;
+}
+set RAM[0] 3,   // Restore arguments in case program used them as loop counter
+set RAM[1] 1,
+output;
+
+set PC 0,
+set RAM[0] 2,   // Set test arguments
+set RAM[1] 4,
+set RAM[2] -1;  // Ensure that program initialized product to 0
+repeat 150 {
+  ticktock;
+}
+set RAM[0] 2,   // Restore arguments in case program used them as loop counter
+set RAM[1] 4,
+output;
+
+set PC 0,
+set RAM[0] 6,   // Set test arguments
+set RAM[1] 7,
+set RAM[2] -1;  // Ensure that program initialized product to 0
+repeat 210 {
+  ticktock;
+}
+set RAM[0] 6,   // Restore arguments in case program used them as loop counter
+set RAM[1] 7,
+output;