> > Hi,
> >
> > I need to add a keypad to a product in development that will co-exist
> > with the standard keyboard. It will be a fairly dumb pad capable of
> ...
>
> You could just design the pad using a "keyboard wedge" so that it lives
> on the same bus as the keyboard. This is well-understood tech that's
> been used for years for things like barcode scanners...
In this case its already designed, sitting on a combo card with other sections
of the product. Basically, I get an INTR whenever any of 12 keys is closed
or opened. I then read 2 bytes from the ISA bus to determine the current state
of all 12 keys. Comparing this to the previous state I determine which key
changed, then "create" a datum equal to F1 thru F12, as appropriate. The
puzzle is where to inject this datum into the flow of data going between
atkbdc/atkbd/kdbio/syscons...
ps.
I am surprised my mail made it to hackers, I just changed ISPs and reverse
name lookups are still failing, and hub claimed to have rejected the mailing!
--
Steve Passe | powered by
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