Historic 3 inch Automotive Silicon Wafer, GM Delco/Motorola CPU, Circa mid 1970s

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Seller Store kaijusears
(4300) 99.6%,

Location: Huntsville, Alabama
Ships to: US,
Item: 255954675846

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Item must be returned within:30 Days
Refund will be given as:Money Back

From the estate of a Delco Electronics engineer, a very old 3 inch wafer with a very interesting history. These processors were predecessors to the modern engine control unit (ECU) that is in virtually every automobile manufactured today. Developed in the mid 1970s in a collaboration between Motorola Semiconductor and GM Delco Electronics. It went into the 1978 Delco Trip Computer. Ford and GM both decided to experiment with implanting CPUs into their cars in the 1970s. While Ford chose to use a Japanese CPU from Toshiba, GM decided to build their own processing unit with special features added for their cars. The chips on this wafer are the direct result of that GM project. The “DE” logo can be seen on the chip along with the “GM” logo. It can be seen in the center of the last photo. This CPU is thousands of times less powerful than the processor in your phone, but in the 1970s it was a state of the art microcomputer. A derivative of the 8bit Motorola MC6800 family, this CPU was custom designed for Delcos use. The Trip Computer was connected to external sensors to monitor engine RPM, temperature, battery voltage, and mileage. It also had a user interface with input buttons and an LED display, similar to those in the digital watches and calculators that also appeared in the 1970s. All of it was monitored and/or controlled by this processor. Trip Computer was a very expensive option first offered in the high end Cadillac’s of the time. Maybe because of the cost, there weren’t a lot of them made. That didn’t deter automakers from seeing the great value of this level of automation and pursuing it. Modern ECUs precisely control numerous functions of your cars engine. As engine control/performance algorithms advance, the sensor/actuator list grows, so does the demand for CPU power. Even racing cars have ECUs in them now. Powerful ones. In fact they are one of the most critical components in winning the race. They control ignition timing, fuel flow, air flow, dash board displays, and a host of other functions. They even make real time recordings of sensor data and parameter settings, so the team can review it and adjust it later. Racing teams are largely responsible for the advances in engine performance and ECU technology we’ve seen over the years. See many other rare and beautiful tech collectables in my ebay store.

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Historic 3 inch Automotive Silicon Wafer, GM Delco/Motorola CPU, Circa mid 1970s

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