direct from "Programming the Z80": IN A, (N) Timing: 3 M cycles, 11 T states, 5.5 usec @ 2 MHz hope it helps. --leighton ---------------------------------- Leighton Shank shanklt@jmu.edu James Madison University GeradS711@aol.com wrote: > How many T-states is this > in a, (11h) > Thanx > Gerad