N2T/projects/07/MemoryAccess/PointerTest/PointerTest.asm

// push constant 3030
@3030
D = A
@SP
A = M
M = D
@SP
M = M + 1

// pop pointer THIS
@SP
A = M
A = A - 1
D = M
@SP
M = M - 1
@THIS
M = D
// ^ pop into THIS

// push constant 3040
@3040
D = A
@SP
A = M
M = D
@SP
M = M + 1

// pop pointer THAT
@SP
A = M
A = A - 1
D = M
@SP
M = M - 1
@THAT
M = D
// ^ pop into THAT

// push constant 32
@32
D = A
@SP
A = M
M = D
@SP
M = M + 1

// pop this 2
@2
D = A
@THIS
A = M
D = D + A
@R13
M = D
// ^ R13 = this + index
@SP
A = M
A = A - 1
D = M
@SP
M = M - 1
// ^ pop into D
@R13
A = M
M = D
// ^ *R13 = D

// push constant 46
@46
D = A
@SP
A = M
M = D
@SP
M = M + 1

// pop that 6
@6
D = A
@THAT
A = M
D = D + A
@R13
M = D
// ^ R13 = that + index
@SP
A = M
A = A - 1
D = M
@SP
M = M - 1
// ^ pop into D
@R13
A = M
M = D
// ^ *R13 = D

// push pointer THIS
@THIS
D = M
@SP
A = M
M = D
@SP
M = M + 1
// ^ push THIS

// push pointer THAT
@THAT
D = M
@SP
A = M
M = D
@SP
M = M + 1
// ^ push THAT

// 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

// push this 2
@2
D = A
@THIS
A = M
A = D + A
D = M
// ^ D = *(LCL + index)
@SP
A = M
M = D
@SP
M = M + 1
// ^ push D

// 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

// push that 6
@6
D = A
@THAT
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