Hack Assembler

This is a 16-bit machine language assembler for 16-bit Hack Assembly Language.

Example Usage:

./asm Max.asm (optional output filename)

Max.asm

// Computes R2 = max(R0, R1)  (R0,R1,R2 refer to RAM[0],RAM[1],RAM[2])

  @R0
  D=M              // D = first number
  @R1
  D=D-M            // D = first number - second number
  @OUTPUT_FIRST
  D;JGT            // if D>0 (first is greater) goto output_first
  @R1
  D=M              // D = second number
  @OUTPUT_D
  0;JMP            // goto output_d

(OUTPUT_FIRST)
  @R0
  D=M              // D = first number

(OUTPUT_D)
  @R2
  M=D              // M[2] = D (greatest number)

(INFINITE_LOOP)
  @INFINITE_LOOP
  0;JMP            // infinite loop

Max.hack

0000000000000000
1111110000010000
0000000000000001
1111010011010000
0000000000001010
1110001100000001
0000000000000001
1111110000010000
0000000000001100
1110101010000111
0000000000000000
1111110000010000
0000000000000010
1110001100001000
0000000000001110
1110101010000111