Scaling example

Example scaling from 0-255 to 0-200 with "(i * 200 + 255) >> 8" method (see original method):


This might work:
;-----bko-----------------------------------------------------------------
evaluate_i2c:	cbr	flags1, (1<<EVAL_I2C)
		lds	temp1, i2c_pwm
		ldi	temp2, 200	; or 100 for 8MHz boards
		cli
		mul	temp1, temp2	; clobbers r0 and r1 (i_sreg)
		subi	r0, 1		; add 255 (round up)
		sbci	r1, -1
		mov	ZH, r1
		sei
		ret