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The DG Nova in its day was a workhorse mini-computer. I worked with Bob McClure (Unidot) and built an "optimizing" C compiler that had surprisingly good performance. We ended up re-organizing the code generated so we could take advantage of the short offset and indirect addressing of the machine without adding extra instructions. Likewise, we used an unusual approach to managing stack frame addressing which was well suited to the DG Nova addressing.

The DG Nova hadware was simple largely because it was built in TTL and the ALU was a 74181. In the mid-1960's the final project in the logic design course was to design a DG Nova machine using TTL.




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