In reply, here are:
1-  Links,
2- Article (selected extracts)

PC keyboard interfacing links:

- Philips Application Note 434, Connecting A PC Keyboard To The I2C-Bus.
   http://www.semiconductors.philips.com/acrobat/8113.pdf

- TechRef (eg.  http://www.piclist.com/techref/io/keyboard.htm )
   (Explore this site, get to know what's in it!)

-  PC Keyboard View by Steve Lawther,
http://ourworld.compuserve.com/homepages/steve_lawther/keybinfo.htm  where
he has a PIC between a PC AT-Keyboard and an LCD display. Full code &
diagrams

- http://www.beyondlogic.org/index.html#ATKEYBOARDS Craig Peacock's
interfacing info.

Then there's...

- PicList past postings http://www.piclist.com/ (Keyword search etc..)
- Search Engines: "PC AT keyboard interface etc..."
- WebRings like Picmicro, 8051, embedded... look for Projects sites and kybd
stuff...

----------

And this from a Piclisters past posting...
  http://boole.stanford.edu/~gdefouw/kbd/pic.html (PIC 16C84 Keyboard
Transmit Routine)
  http://www.arne.si/~mauricio/PIC.HTM  (not responding today)
  http://www.repairfaq.org/filipg/LINK/PORTS/F_Keyboard_FAQ.html
  http://www.geocities.com/SiliconValley/Bay/8302/keybrd.htm
  http://www.brouhaha.com/~eric/pic/
  http://www.hth.com/filelibrary/TXTFILES/keyboard.txt


I see in InfoTech Weekly news, Issue: No. 486 Monday April 23, 2001.
Here's a few paragraphs from the article, before links listed below:

Keyboard 'snooping' device finds market.

Christchurch company KeyGhost is poised for international success with its
keyboard 'snooping' device.
 The company has sold 1500 units of its KeyGhost product in its first year
of operation and signed up distributors in the United States, Germany,
Australia, and Canada.
 The hardware device records every keystroke made on a keyboard, with
password-protected logs that the user cannot tamper with.
-- snip--
 KeyGhost is embedded in a keyboard or PC and cannot be bypassed.
--snip--
The device ranges in prices from US$139 to $349, with the three models
available holding about a week, a month, or several months of typing.
 She says the main market in the longterm will be the corporate sector.
--snip--
 KeyGhost can be used in English, German and Arabic.
--snip--
 Some software developers are also buying KeyGhost as a backup, so that if
their systems crash their code is not lost.
 The device can also help them debug programs - if a program crashes, the
combination of keystrokes that led to this can be pinpointed and the code
subsequently corrected.
 KeyGhost was originally developed by Canterbury University students
frustrated at losing work when their computers crashed.
--snip--
 The device has a bigger capacity than any of its competitors, she says, and
is well-positioned to lead the market.
----[ end of selected extracts from InfoTech article]------




----- Original Message -----
From: "Justin Fielding" <j.fielding@BTINTERNET.COM>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Tuesday, May 08, 2001 5:18 AM
Subject: [PIC]: PS/2 Keyboard logger?


I would like to build a small device with which I can log all keypresses of
a keyboard into an eeprom.  The device would go between the keyboard and PC
and have a tap on the data line.  Anyone done this?  WHere can I find info
on the protocol?

Thanks
Justin.
--

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