I really don’t know much about the engineer behind the ssc-32, but I know that the output compare register in the Atmega chips is OCCR not TCCR. OCCR is up to Out put compare register while TCCR is for Timer control register.
You’re correcting a typo in a 5-year old quote from the software engineer who wrote the fine code in the SSC-32?
I studied the code 5 years ago, compiled it, ran it, etc. It’s still top of it’s game!
Alan KM6VV