The Zilog Z8000 series, a 16-bit follow-on to the Z80, did not have any microcode in it, which meant it had less transistors than would otherwise be needed (17,

The Zilog Z8000 series, a 16-bit follow-on to the Z80, did not have any microcode in it, which meant it had less transistors than would otherwise be needed (17,500 vs 29,000 on the 8086, for example).