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This article was posted to the Usenet group alt.hackers in 1995; any technical information is probably outdated.

Serial / PS/2 Mice

Article: 7364 of alt.hackers
From: (Simon Cooke)
Newsgroups: alt.hackers
Subject: Serial / PS/2 Mice
Date: 13 Feb 1995 13:02:54 GMT
Organization: Manchester Computing Centre
Lines: 15
Approved: Simon Cooke
Message-ID: 3hnl9u$
X-Newsreader: TIN [version 1.2 PL2]
Status: RO

Hi Guys...

Anybody out here got any idea how the serial mouse / keyboard work?
I'm talking serial data format, power etc here :)


Opened up the mouse, checked the xtal to find out what baud it was
running at. All it said was S429, so I got out the oscilloscope -- it was
about 28MHz (IIRC). Sooo.. played around with the scope some more, now I
can read the mouse buttons. But can I get the rest of the data in so
called pS/2 packet form? Can I hell... /AND/ I'm getting framing errors
all the time...

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