PIC10F200 blinking LED

tinyblink.asm

; Blinks an LED connected to GP2 at roughly 15 Hz.

  INCLUDE "p10f200.inc"

  __CONFIG _WDTE_OFF & _CP_OFF & _MCLRE_OFF

  ORG    0x0000
  MOVLW  ~((1<<T0CS)|(1<<PSA))  ;enable GPIO2 and 1:256 Timer0 prescaler
  OPTION
  MOVLW  ~(1<<TRISIO2)  ;set GP2 as an output
  TRIS   GPIO

  MOVLW  1<<GP2
blink:
  XORWF  GPIO,F ;toggle GPIO bit
  CLRF   TMR0
delay:
  BTFSS  TMR0,7 ;wait until TMR0 reaches 128
  GOTO   delay
  GOTO   blink  ;loop back
  
  END

One cycle can be saved if GP1 is used instead of GP2. W will contain the value 2, which can then be used to replace GOTO delay with SUBWF PCL,F to back up to the previous instruction. (DECF PCL,F produces an infinite loop.)