And also at usable clock rates too. I routinely use Cygnal parts, with their 1 and 2 clock cycle instructions, at 22.1184 MHz. That is just 45.2 nsec per bus cycle. Even at this "reasonable" clocking rate a Cygnal can outperform an original style 8051 at 12 MHz by a factor of 22X on single cycle instructions!!! And you do not need to purchase an expensive IP core and an expensive FPGA to program it into!!!

Of course Cygnal offers parts at even higher performance too. Even at amost ridiculous clock speeds.

Michael Karas