any idea what this schematic is?

[dwight elvey]

Hi
 Looks like  RS422 interface.
Dwight


----------------------------------------
> Date: Sat, 20 Dec 2008 22:01:22 -0500
> From: ray at arachelian.com
> To:
> Subject: any idea what this schematic is?
>
> http://flickr.com/photos/spaceageboy/3117272956/sizes/o/
>
> Would this be the interface between the Lisa and the Mac as related here:
>
> http://folklore.org/StoryView.py?project=Macintosh&story=Shut_Up.txt&sortOrder=Sort%20by%20Date&detail=medium&search=shut%20up
>
>> Unfortunately, there was one small snag. We were using the Lisa as the
>> development machine for writing the software for Macintosh, and we
>> hadn't yet reached the point where the Macintosh could run
>> stand-alone. The Macintosh needed to be hooked up to a Lisa, in order
>> to download software from it. But the Lisa group was writing all of
>> its own applications for Lisa and didn't want Microsoft to see a Lisa.
>> They made us promise that we wouldn't let Microsoft see the Lisa.
>>
>> We finally came up with a solution where we'd use a twenty-five foot
>> cable and keep the Lisa in a different room that the Microsoft guys
>> weren't allowed to enter. I would start up the programs on the Lisa in
>> the other room, and Bud Tribble would operate the Macintosh. I would
>> usually run into the main room to see their reaction.
>
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