30 Jul
2007
30 Jul
'07
12:21 p.m.
On 30 Jul 2007 at 14:52, Dave Dunfield wrote:
Thanks - I hadn't thought about that, and I'll
look into it. Funny
thing about PCs - slower CPU (even significantly slower) doesn't
necessarily mean slower time between I/O accesses... This could be a
factor.
I'd suggest using a couple of transitions of the 50 usec. "refresh"
flag. It's part of the legacy PC design and is present on almost
anything PC-AT and later.
Simple and consistent without bothering with calibrating program
loops.
Cheers,
Chuck