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Tesla Challenge 1: Fizzbuzz Test Engine

Subject: Preschool toy
From: Wu Lili 吴丽丽 <wulili@longteng-co-ltd.gd.cn>

We've been tasked to create a bunch of 'fizzbuzz test' devices for a Shenzhen preschool. If you don't know, the classic fizzbuzz test is about replacing a number with Fizz if 3 divides it, Buzz if 5 divides it, or Fizzbuzz if both 3 and 5 divide it. Our version will use dials that allow the user to set their own values. This should be an easy task.

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Small hint: You need to test for divisibility, which requires the modulo operation. It is easier to do in MCxxxx assembly than division is.

Big hint: To test if b divides a, keep subtracting b from a. If you reach 0, it's divisible; if you reach a negative number before reaching 0, it's not.

Optimization tip: The code to test for divisibility fits into an MC4000X microcontroller.