On Wed, 25 Mar 2009 14:45:33 -0700, "Joel Koltner"
wrote:

These were software RS-232 receivers, so you make use of whatever timers, edge
interrupts, etc. that you have sitting around to first the start bit, load up
a timer to then trigger in (what should be) the middle of the bit time for the
sample, etc. I've written pretty much the same routines a small handful of
times on different CPUs and in different languages.

Hi Joel,

Pretty deep in the basement, there. Sounds like the way Apple used to
run their floppy disc, read it, and write it with a minimum of parts
(and expense).

73's
Richard Clark, KB7QHC