HP board id?

[Paul Birkel]

That is a *really* nice document, in so many ways.  Thanks for sharing, and
for the answers to earlier questions :->.

On Thu, May 14, 2015 at 11:31 AM, J. David Bryan <jdbryan at acm.org> wrote:

> On Thursday, May 14, 2015 at 1:46, Paul Birkel wrote:
>
> > What do they recommend on the receiver-end?
>
> LSTTL with a 4.7K pulldown to -2V on the input.
>
>
> > Is the "HP 1000 M/E/F-Series Computers I/O Interfacing Guide"
> > (02109-90006 September 1980) available online somewhere?
>
> I thought I had sent it to Al some years ago, but it's not listed.  In any
> case, I've posted it here:
>
>   http://home.earthlink.net/~jdbryan/dropbox/02109-90006_Sep-1980.7z
>
> See chapter 5, pages 5-5 and 5-6.
>
>                                       -- Dave
>
>