4.7

projects/04/tests/Flip.asm

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+//Flip.asm
+//flips the values of RAM[0] and RAM[1]
+
+//temp=R1
+//R1=R0
+//R0=temp
+
+@R1
+D=M
+@temp   // Variable
+M=D     // temp = R1
+
+@R0
+D=M
+@R1
+M=D     // R1 = R0
+
+@temp
+D=M
+@R0
+M=D  // R0 = temp
+
+(END)
+@END
+0;JMP
+
+//@temp --> find some available memory register (register n)
+//and use it to represent the variable temp. So, from now on, each
+//occurance of @temp in the program will be translated into @n

projects/04/tests/Frage.txt

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+How would a assembler distinguish between a branching symbol and a variable symbol?
+Wie würde ein Assembler zwischen einem Verzweigungssymbol und einem variablen Symbol unterscheiden?
+
+A branching symbol has a label declaration somewhere in the program, and a variable symbol doesn't