Searching \ for 'Extra Keyboard' in subject line. ()
Make payments with PayPal - it's fast, free and secure! Help us get a faster server
FAQ page: www.piclist.com/techref/index.htm?key=extra+keyboard
Search entire site for: 'Extra Keyboard'.

Truncated match.
PICList Thread
'Extra Keyboard'
1998\11\10@151546 by Peter Seyringer

flavicon
face
Hi!

I need a secound keyboard for a self written program. I want to insert it
between the PC and a normal keyboard. Does anyone know how the transfer
between PC and keyboard is working? I want to use a 16C84 PIC for the
keyboard controller? Can you help me?

Peter

1998\11\10@183349 by Mark Willis

flavicon
face
I have a bunch of links (Some like repairfaq.org may be expired a
little as they've maybe changed servers) here;  Hope these help.  It's a
TOUGH thing, but do-able;  I'll help if I can, but I'm behind here.

www.mbhs.edu/~ojenkins/wearable/fiddler.html
ourworld.compuserve.com/homepages/steve_lawther/keybinfo.htm
http://www.arne.si/~mauricio/PIC.HTM
www.repairfaq.org/filipg/LINK/PORTS/F_Keyboard_FAQ.html
www.geocities.com/SiliconValley/Bay/8302/keybrd.htm
www.phlat.com/din/ad_MiniDinToDinKeyboard.html
http://www.brouhaha.com/~eric/pic/
http://www.hut.fi/~then/mytexts/mouse.html

 Mark, spam_OUTmwillisTakeThisOuTspamnwlink.com

Peter Seyringer wrote:
>
> Hi!
>
> I need a secound keyboard for a self written program. I want to insert it
> between the PC and a normal keyboard. Does anyone know how the transfer
> between PC and keyboard is working? I want to use a 16C84 PIC for the
> keyboard controller? Can you help me?
>
> Peter

1998\11\10@184155 by Andrew Hitt

flavicon
face
This could be a can of worms.
Try "PC Intern", by Michael Tischer, ISBN 1-55755-145-6, C.1994.
It is old (and 1300 pages!) and focuses on DOS system programming, but his
chapter 5 is on PC keyboard handling. Maybe you can borrow a copy.
Extracts from his book: Keyboards generate a scan code for each key, or
combination of keys, pressed.
The transfer to the PC is synchronous.
Keyboards use(d) the Intel 8042 chip to read the switch presses and generate
the scan code. Complicated stuff, this.
Good luck with this one.
ATH

At 09:03 PM 11/10/98 +0100, you wrote:
>Hi!
>
>I need a secound keyboard for a self written program. I want to insert it
>between the PC and a normal keyboard. Does anyone know how the transfer
>between PC and keyboard is working? I want to use a 16C84 PIC for the
>keyboard controller? Can you help me?
>
>Peter
>
>
---------
Andrew Hitt
Raytheon
805-355-1710
---------

1998\11\10@194813 by Andrew Hitt

flavicon
face
This could be a can of worms.
Try "PC Intern", by Michael Tischer, ISBN 1-55755-145-6, C.1994.
It is old (and 1300 pages!) and focuses on DOS system programming, but his
chapter 5 is on PC keyboard handling. Maybe you can borrow a copy.

Extracts from his book: Keyboards generate a scan code for each key, or
combination of keys, pressed. The transfer to the PC is synchronous.
Keyboards use(d) the Intel 8042 chip to read the switch presses and generate
the scan code. Complicated stuff, this.
Good luck!
ATH
>
Does anyone know how the transfer between PC and keyboard is working?

---------
Andrew Hitt
Raytheon
805-355-1710
---------

1998\11\11@161939 by Richard A. Smith

flavicon
face
On Tue, 10 Nov 1998 21:03:55 +0100, Peter Seyringer wrote:

>between the PC and a normal keyboard. Does anyone know how the transfer
>between PC and keyboard is working? I want to use a 16C84 PIC for the
>keyboard controller? Can you help me?

I probally can... I have implemented 2 way transfer across the keyboard port bet
ween a PC and a 16C73.  It was fairly limited in
that I only dealt with single keys (no alts, ctrls and so forth)  I blew off the
break code and no error checking just delay long
enough to let the PC side time out and go on.

As mentioned by others a FULL keyboard is no trivial task.  Of course if it was
well documented somewhere it would be a little
eaiser.  Most of what I learned I gleened from using a digital storage scope.  A
n interesting note is the most of the scan codes
are NOT what is actually exchanged across the kb port.  The BIOS generates these
.

Are you wanting a full keyboard?




--
Richard A. Smith                         Bitworks, Inc.
.....rsmithKILLspamspam@spam@bitworks.com               501.521.3908
Sr. Design Engineer        http://www.bitworks.com

1998\11\11@164910 by Carlos V. Gutierrez Fragosa

flavicon
face
>I need a secound keyboard for a self written program. I want to insert it
>between the PC and a normal keyboard.
>Does anyone know how the transfer
>between PC and keyboard is working?

Maybe you can find something useful in my page:
http://sca.enlace.com.mx/carlosg/keyemu/

It's not PIC related, but there are sources and some links.


Carlos V. Gutierrez Fragosa - Hermosillo, Mexico
Beeper (62)102818 Clave 3121 Tel(62)156207 Fax(62)146227
carlosgspamKILLspamsca.com.mx  http://www.sca.com.mx

More... (looser matching)
- Last day of these posts
- In 1998 , 1999 only
- Today
- New search...