DECSYSTEM-20 is closer to a proper mainframe. It was at least 6x faster than VAX-11/780 on a benchmark I tried in ~1987. Also TOPS-20 was the bomb! http://go

DECSYSTEM-20 is closer to a proper mainframe. It was at least 6x faster than VAX-11/780 on a benchmark I tried in ~1987. Also TOPS-20 was the bomb! http://gordonbell.azurewebsites.net/cgb%20files/evolution%20of%20decsystem%2010%20acm%207801%20c.pdf http://gordonbell.azurewebsites.net/cgb%20files/evolution%20... Sadly it was an anachronistic 36-bit machine with no future..