On Apr 21, 2020, at 12:17 AM, Walter Zambotti <zambotti at iinet.net.au> wrote: > > I'm not sure why (apart from old age) I have a clear recollection of seeing the original Os9 had a time slice of 1/10 sec and the later Os9 was 1/100th. OS-9 68000 runs 100 ticks per second.