n2t-assembler

Assembler for the hack assembly language, as specified in the Nand 2 Tetris book.
These hack bin files can be run with the CPU emulator provided to accompany the aforementioned book.

usage

Accepts an asm filename as an argument, and writes the binary code to a hack file of the same name.

> cargo run Add.asm

assembling Add.asm
written to Add.hack

examples

> cat Add.asm

// 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/06/add/Add.asm

// Computes R0 = 2 + 3  (R0 refers to RAM[0])

@2
D=A
@3
D=D+A
@0
M=D

> cargo run Add.asm

assembling Add.asm
written to Add.hack

> cat Add.hack

0000000000000010
1110110000010000
0000000000000011
1110000010010000
0000000000000000
1110001100001000

> cat RectL.asm

// 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/06/rect/RectL.asm

// Symbol-less version of the Rect.asm program.

@0
D=M
@23
D;JLE
@16
M=D
@16384
D=A
@17
M=D
@17
A=M
M=-1
@17
D=M
@32
D=D+A
@17
M=D
@16
MD=M-1
@10
D;JGT
@23
0;JMP

> cargo run RectL.asm

assembling RectL.asm
written to RectL.asm

> cat RectL.hack

0000000000000000
1111110000010000
0000000000010111
1110001100000110
0000000000010000
1110001100001000
0100000000000000
1110110000010000
0000000000010001
1110001100001000
0000000000010001
1111110000100000
1110111010001000
0000000000010001
1111110000010000
0000000000100000
1110000010010000
0000000000010001
1110001100001000
0000000000010000
1111110010011000
0000000000001010
1110001100000001
0000000000010111
1110101010000111