"Lost to history"? Really? The developers are still alive, you could have, you know, sent them an email and asked.
https://seanmalstrom.wordpress.com/2011/08/19/email-a-look-i...
shows Nintendo programmers plugging away at HP 64000 which was likely corporate-owned and long destroyed
http://en.wikipedia.org/wiki/HP_64000
"Lost to history"? Really? The developers are still alive, you could have, you know, sent them an email and asked.