>>There are problems with FPD 2.0 and the newer PCs. The hardware is just too fast for some things. A rewrite is in order.
>
>I believe that 2.5a is latest FP DOS version. Same problem? Any idea why the problem exists at all (i.e., how can there be a timing problem on a single-user, single-threaded non-preemptive operating system)?

There is 2.5b and 2.6 (2.6a should be the last for DOS). No problem with 2.5 and up (I use them on P200, M1-166+ and K6-200 -much faster than P200-). I don't have 2.0 for years and don't know if ever this problem existed.
Cetin