just learning assembler

hi! just read the first tutorials on assembler. i.e turning LED ON and OFF.

my question:
is it a must or a tendency to use w register(movlw) to assign values to other registers, like TRISA, PORTA.

or is there any way i can assign, say PORTA, a value without first moving it to a w register?

you can set it one bit at a time with bsf or bcf instructions. Bytewise you must use the working register on the 12 & 14 bit core PICs