Homebrew PS/2 Keyboard reader

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lezanderson
Posts: 175
Joined: 14 Aug 2012 15:31

Homebrew PS/2 Keyboard reader

Post by lezanderson » 19 Jul 2014 20:55

I was Mooooching around the web... and found some interesitng low cost PS/2 keyboard interface/decoders..

PS/2 Encoder interfaces industry standard PS/2 PC-compatible keyboards to devices requiring TTL-level RS232, parallel data , and/or PC XT signaling. All ASCII key sequences are decoded, as well as common keyboard sequences like “CTRL-ALT-DEL”. To provide maximum flexibility for various uses while retaining ease of operation, the unit’s configuration can be modified in-circuit using the PS/2 keyboard itself.

Uses ATmega MCU

http://www.go4retro.com/products/ps2-encoder/

And

AT89C2051 schematic

http://circuit-diagram.hqew.net/IBM-PC- ... 20848.html

These look like they could be intergrated into one's own homebrew DIY designs ?

Martin A
Posts: 417
Joined: 09 Nov 2013 21:03

Re: Homebrew PS/2 Keyboard reader

Post by Martin A » 26 Jul 2014 10:40

Grant Searle has a PS2 to serial keyboard design here:

http://searle.hostei.com/grant/MonitorK ... index.html

As well as various other "interesting" bits and pieces

User avatar
1024MAK
Posts: 569
Joined: 24 Dec 2012 03:01
Location: Looking forward to summer, in Somerset, UK

Re: Homebrew PS/2 Keyboard reader

Post by 1024MAK » 26 Jul 2014 22:32

PIC microcontrollers can do this job as well.
As can Z80 based systems :mrgreen:

Mark

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