"The Z80, almost as legendary as the x86, has evolved into the eZ80 Webserver SoC (eZ80190) from ZiLOG Inc. No longer memory-limited, the eZ80's 16-bit registers have grown into 24-bit registers that provide a linear 16-Mbyte address space without a memory management unit (MMU). This capacity is greater than most competing 8- and 16-bit processors.

Code-compatible with the Z80, the eZ80's new instructions support the larger registers. Other enhancements include a 16- by 16-bit multiplier with dual 40-bit accumulators. Operating at 50 MHz, the eZ80 isn't as fast as most high-performance 32-bit processors. Yet it's more than adequate for the control and monitoring environments it targets."