dave wrote: > The 32016 was a good design as far as I could tell. Orthogonal > instruction set, 8 sets of registers, etc. I understand that National > simply didn't give much support. Most of the boards were VME bus. > The chip seemed to get used more in Europe than here. > National Semi never was good at support of these complex products. The machine I had (I built a clone of the LMC system) had no cache, and ran on a 16 MHz clock, I think. I think it could have used a cache pretty badly. I think also the MMU caused a significant slowdown. Basically it was supposed to be a VAX on a chip, but the DEC MicroVAX-II ran rings around it in virtual addressing mode. I don't really know if the file system or the multibus-disk controller was what really made it slow, but it was a bit of a disappointment.
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