Andre ting man finner i kjelleren. Reklamebladet Apple Nytt (#AppleNYTT ?) fra 1991, som inneholder et intervju med Kristen Nygård om #Simula og #objektorientering.
I've got a busted consumer product here that has 2 #Holtek#microcontrollers in it. Either one would be sufficient to run this product (a brushless-motor tower fan), but #MCUs are cheap, so why not throw a second one in if it saves a few centimeters of wire?
I'm trying to determine if there's a #standard#serial#physical#layer in use here to communicate from one #MCU to the other. It's one-way communication.
The connection from one MCU to the other is a single #signal#wire, plus shared #power and #ground. It's a point-to-point link; there's no addressing involved. It's simplex, so no collision detection or anything complicated.
In fact, it's dirt-simple, and extremely low-bandwidth. The secondary MCU transmits a single #byte of data to the primary MCU approximately every 120ms. So ~70 bits per second, max.
Robert Tinney was the cover artist for Byte magazine from 1975-1986, where he cranked out these fantastic paintings that captured the spirit of tech from that time. Here is one of my favorites (from 1981). #RetroComputing#Byte