Collection of usefull assembly loops and functions

for-loop.asm

;=====================================================;
; This piece of code runs certain times depending on  ;
; how many nested loops you create. Each loop can     ;
; count up to 255.                                    ;
; We declare a variable for each loop and preload     ;
; them with the default value (maxium FFh or 255d     ;
; For demonstration purposes we're using just 3       ;
; nested loops executing a total of 845.325 times     ;
;=====================================================;

; Declare a variable for each nested loop
cblock      0x20
  COUNTER1
  COUNTER2
  COUNTER3
endc

; Declare each preload
  PRELOAD1 equ 255
  PRELOAD2 equ 255
  PRELOAD3 equ 13

begin:
  movlw PRELOAD1
  movwf COUNTER1
loop1:
  movlw PRELOAD2
  movwf COUNTER2
bucle2:
  movlw PRELOAD3
  movwf COUNTER3
bucle3:
  ;=== INSTRUCTIONS HERE ===;
  decfsz COUNTER3
  goto loop3
  decfsz COUNTER2
  goto loop2
  decfsz COUNTER1
  goto loop1