Code

  ; Macros for registers
  $MACRO AX : 0
  $MACRO BX : 1
  $MACRO CX : 2
  $MACRO DX : 3

  ; Load first 2 values
  MVDR 1, AX
  MVDR 1, BX

  ; Set loop index to 0
  MVDR 0, CX

  ; Add the values
  ADD AX, BX

  ; Load result into RAM
  MVRAD AX, CX

  ; Increment loop index
  INC CX

  ; Jump to the start if loop index < 20
  CPRD CX, 20
  JILT 3

  ; Output first 5 values
  MVAR 0, CX
  OUT CX, 0

  MVAR 1, CX
  OUT CX, 0

  MVAR 0, CX
  OUT CX, 0

  MVAR 2, CX
  OUT CX, 0

  MVAR 3, CX
  OUT CX, 0