Z80/Z180/Z380 MPU Comparison Chart


Z80 Z180 Z380
External Data Bus Width 8-bit 8-bit 16/32-bit
Address Space 64k 1Mb 16Mb Linear
Number of register sets 2 2 8 16-bit
Number of register planes 1 1 4
Static core no yes yes
CPU Speed 10 33 18
Clocks/Inst. Min 4 3 2
Relative Performance 2.5 11 33