Re: It works ;-)

From: Richard Atkinson (
Date: 2000-08-25 19:52:49

On Fri, 25 Aug 2000, Hársfalvi Levente wrote:

> Well probably. Once I was thinking on leaving the serial mouse idea in
> favour of the PS/2 mouse, but I had no infos on this latter. Does anyone
> on this list have docs for the PS/2 mouse? (Connector layout, protocol
> and so on). Indeed, supplying the appropriate voltage level have been,
> and is still a critical part in the interface design (at least, if one
> wants to avoid using integrated dual voltage doubler chips and the
> like). I started with using some 555+diodes+capacitor based circuit,
> then swapped it to a TL497, then left the whole part and powered the
> mouse from the single +5V (current prototype board). Some mice still do
> work from this supply, some not. I don't want to rely on this
> possibility, so I'll either include a small voltage multiplier, or
> forget the whole idea and move to the PS/2 mouse (which one, depends on
> how much troubles will I have with the voltage part, and if some of you
> can point me to a PS/2 mouse info source).

Here's a good one on HUT:

I also found an AT/PS2 keyboard text:


Richard Atkinson
Software Engineer
Tenison Technology EDA Ltd

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