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I designed the hardware, and wrote the software, for these printed circuit boards manufactured in Canada between 1990 and 1995. You can read about the technical details here but the CPU (square 52-pin chip) is the Motorola MC68hc11F1
Wanderer-Werke / Nixdorf / Siemens-Nixdorf
I was attending night classes at Conestoga College during the Spring of 1974 (Digital Electronics 1) when I learned that a fellow classmate had a job doing computer installations and removals. When he told me that some older hardware at his current work location (Cambridge, Ontario) location was going to be discarded, I asked him for a souvenir. A week later he handed me this 3-board gem manufactured by German computer manufacturer Wanderer-Werke (now a division of Siemens-Nixdorf).
The photo to the right is from one corner of one of the boards. Notice the double-W (representing Wanderer-Werke)
Carefully inspect the two photographs below where we can see magnetic core memory. These pictures only contain discreet components like transistors. There are no chips (a.k.a. integrated circuits)