The Space-cadet keyboard was made by John L. Kulp.
it was designed around 1978, and making began in 1979, and arrived at MIT lap in 1980 January.
[see Space-Cadet Keyboard Design]
There is a file dated 1978 with notes about the new Space-cadet keyboard. It's signed “JLK”. https://raw.githubusercontent.com/mietek/mit-cadr-system-software/master/src/lmdoc/kbdpro.3
The CADR initially used the Knight keyboard.
It seems design and manufacturing progressed during 1979. There is an email from January 1980 that the “new keyboards” arrived to the lab. https://ml.cddddr.org/bug-lispm/msg00859.html
The CADR, LMI, and LM-2 all used the same Space-cadet keyboard although they looked different.
[ 2019-02-28 email from Lars Brinkhoff. • http://lars.nocrew.org/ • https://github.com/larsbrinkhoff]
The lisp machine that used space-cadet keyboard includes the following, though the keyboard may look different:
- LMI's lisp machine LMI-CADR.
- Symbolics's lisp machine LM-2.
LMI Lambda keyboard
The Space-cadet keyboard is also made by Lisp Machine Inc, for their LMI-CADR machine, year 1983.
Note the LMI logo. It's lisp cons cell, which is the building block of lisp's list.
See also: Guy Steele Says: Don't Iterate, Recurse, and Get rid of cons!
Meta Hyper Super Modifiers
The modifiers are:
- Shift → For UPPERCASE letters
- greek/front → insert Greek character, printed in front of the keycaps.
- top → insert APL characters, printed on upper top of the keycaps.
- Meta → modifier, used heavily in emacs.
- Hyper → extra modifier, can be used in emacs.
- Super → extra modifier, can be used in emacs.
The extra modifiers allows more key combination possibilities.
However, extra modifiers create much less possibilities than key sequences.
[see How Many Keyboard Shortcuts Are There]
[see How to Create APL or Math Symbols Keyboard Layout]
Thumb Up Key
[see Hand Emoji 👍]
Photos of the Space-cadet keyboard by webwit At http://deskthority.net/viewtopic.php?p=23509. Used with permission. You can see more photos about key caps and electronics there.
For the key layout, see: Lisp Machine Keyboard Layout
For lots more photos of the space cadet keyboard, see: Jesse Vincent's photo album flickr
2016-06-17 Thanks to Jon Snader http://irreal.org/ for tip.
Hacker Lore Keyboards
If you have a question, put $5 at patreon and message me.