DIGITS

;Understanding assembler, by Henrik Stolpe
;Computes the maximum value represented by a certain number of bits
;and stores every bit value in a block of words
;the maximum value is returned in d0 (in hex!)

s:
moveq	#2,d0			;mulu base of 2
moveq	#8,d1			;8 bits, counter
lea	digits,a0		;load effective adress digits into a0
subq	#2,d1			;correct value for loop

loop:
mulu	#2,d0			;multiply d0 by 2
move	d0,(a0)+		;store number in d0 in a0 and increase a0
cmp	#0,d1			;check if counter is zero
dbeq	d1,loop			;if not decrease counter and continue
rts				;when the loop have executed 8 times
				;the maximum value will be located
				;8 words down in the area digits

digits:
blk.w	8			;room for 8 bits