31 Oct
2008
31 Oct
'08
7:43 a.m.
On Oct 31, 2008, at 4:12 AM, Chuck Guzis wrote:
What do the signals on the data connector look like? I seem to
recall that there are some differential pairs on there...are they
analog or digital?
-Dave
--
Dave McGuire
Port Charlotte, FL
I think the
end of the last discussion on this resulted in the
conclusion that
it could be done, but required frequencies high enough to rule out
just
slapping some TTL together on a bit of prototype board...
ISTR the bitrate from a ST412 drive was about 5 MHz, or one bit every
200 nsec/8 bits per 1.2 usec. That doesn't seem to be all that high
to me--at least not in terms of today's logic. I think I remember
that RLL 2,7 drives had to be able to handle 7.5 MHz data.