Well, I know of 2.5 mhz, 4 mhz (Z-80A) and 6 mhz. Other than clock speed, there is little difference if any. Roy BAD wrote:
Hi; I am wondering what the speed differences are between the Z80, Z80A, Z80B, and any other Z80 versions? I have a box of old Apple II cards that I am culling. Among them are several Z80 cards wih different speed processors. I'd like to keep the fastest. Thanks, Brian