HP board id?

[J. David Bryan]

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