24 Apr
2008
24 Apr
'08
1:47 p.m.
Tony Duell wrote:
The QIC02 interface is pretty simple. 8 data lines and
a handful of
control/handshake lines (I think fewer than 8 of those). The control
lines, from what I remmeber are all unidirecional (obviously some from
drive to host, others from host to dive), the data lines are
bidirectional (but all in the same direaction at any given time).
I think the interface can be bit-banged. If not (i.e. there are some
critical timings)
Hmm, maybe the designers were sensible, and any critical timings are solely on
the device response side - i.e. the host can take as long as it wants to
process things, but the device must respond within a certain time period (and
then just happily sits there until the host acknowledges).
Of course none of this probably helps Chuck, who quite possibly doesn't want
to be messing with designing hardware and writing driver software :-) It's
just nice to speculate that it could be done once QIC interface boards are
unobtainable...
cheers
Jules