14 May
2012
14 May
'12
2:30 p.m.
Since we're talking VHDL here, how does the
performance of the old
USSR chips differ from the performance of a modern FPGA
implementation, say, the W11A version of the PDP 11/70 on opencores?
Basically, those chips are analogous to Ferranti's ULA, they are made of 100 000
logical gates powered by 5 volt VCC. So, if overclocked to 8...10 Mhz sytem should yeild
~2500000 reg->reg operations per second. Modern fpga cores probably may run on speed up
to 20Mhz using Cyclone-IV, so expected performance up to 7 000 000 reg->reg op/sec.