Re: iic boot from serial port?

[Paul Guertin <pg@sff.net>]

CUTjefbla@bconnex.net (Jeff Blakeney) wrote:

> On Fri, 16 Feb 2001 19:06:35 +0900, Paul Guertin <pg@sff.net> wrote:
> 
> >You can get bidirectional communication with a standard Grappler
> >card (and, I imagine, many other cards) by using the printer status
> >lines as input, as Paul said.
>
> Another question arises then.  Is there enough of these lines to allow
> for 8 bit communications in both directions and still have at least
> one line left over to signal valid data?  This means having to have 9
> inputs and 9 outputs on the card.

No, and that's part of the fun of writing your own driver. IIRC,
there are 5 lines available on the Grappler, which means you can
receive only 4 bits at a time.

I experimented with this five years ago, made a cable and wrote
some software that worked sometimes, but all my notes are in
storage, unfortunately.

Paul Guertin
pg@sff.net