Hi all, When using the PULSIN instruction, are the (10uSec.) units measured based on the oscillator or an internal timer? I'm using a 3.58Mhz resonator; should I assume each 10uSec unit is actually 10uSec * 1.173 (4.0Mhz/3.58Mhz) or 11.73uSec? John ______________________________________________________________________________ John Leonard, instrument technician Electron Hacker College of Science & Engineering Bit Banger Saginaw Valley State University Bassist University Center, MI USA 48710 Dad _____________________________________________________________________________