$ 0 0 Code: movwf tempF ;f = rrrrrbbb lslf tempF,f ;f = rrrrbbb0 , discard msb movlw 0xF0 ; At first breakpoint: After lslf: Language: MPASM Assembly MPLab 8.92 MCU: 16F1783 Re-assembled and programmed with same result. Used to work.