One of my favorite EEVBlogs. Thanks for the submission. Bob's yer uncle! Side note: Dave noted the use of the old school OTP chip to store the executable code,

One of my favorite EEVBlogs. Thanks for the submission. Bob's yer uncle! Side note: Dave noted the use of the old school OTP chip to store the executable code, contrasted it with modern flashable chips, and then linked the use to the original design. However I wonder if retaining the OTP chip isn't a specific security measure? It does what is needed with much less attack surface than a reprogrammable chip, doesn't it?