keyboard creation

[Oren Beck]

>From: Admin <web at linux2themax.com>
>To: Kansas linux ers <kclug at kclug.org>
>>
>>I think docs for all this should be available online.  I designed a PC 
>>PS/2 keyboard controller part into a custom system once, and it came with 
>>lots of details on how everything worked.  The old IBM reference manuals 
>>for the original PC and AT would probably also cover this.  I've also 
>>found the BIOS manufactures to provide good documentation on low-level 
>>system stuff, so you might check them out, as well.
>
>
>http://www.datahand.com/
>
>thats a little further then what i want to do and a hell of a lot more 
>expensive.  1500$
>
>I would how ever like to use some of those ideas in the keyboard i want to 
>make.  usb would be fine by me possibly prefered.  as i play a fiew games 
>it would be nice to be able to hit 5 keys and they all work insted of the 
>maximum of 3 by current ps2.  though a while back i heard that it was the 
>chip in the keyboard that limited that but cant remember
>
>
>oren  that controler sounds pretty cool duno if it would be able to do what 
>im intrested though. im just intrested in making a  pc keyboard.  how ever 
>the mame stuf is kinda a side intrest to ;)
>

Actually the reason for THAT particular switch encoder is a very close 
cloning of it is often used to replace obsolete switch/sensor boards on pc 
controlled gear that is orphaned . The same breed of  " dry contact to PC "  
controller  is often under $ 20 as a developer sample from various magazine 
ads in industry trade journals . I used a " Black Boxes " brand self powered 
Serial to Parallel
converter for a microfilm  camera's failed board. The original board from 
the camera used reed relays and TTL to a custom long slot XT ! board . The 
XT and it's stuff worked fine- it was the reed relay board that puked. 
3M/Imation wanted 1900 for the 2 boards claiming them a mated set !

Good Luck .

Oren

" Microsoft bashing is counterproductive as they  do a much better job of it 
by their own  actions "

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