On Tue, Oct 6, 2026 at 11:43 AM <[email protected]> wrote:
> Is there any reasonably-simple, reasonably-inexpensive way to use a ps/2
> 3-button mouse (..recommended for use with plan9..) with a raspberry-pi 1 B
> or 3 B?
> My understanding is that such a thing, even with an adaptor, requires a
> powered usb port delivering ~1.5A, and the only pi that delivers this is the
> 5.
1.5A for a PS/2 mouse? No way. A PS/2 port will only supply 250mA or so at 5V.
The older USB specs said that a USB port ought to be able to provide
500 mA at 5V. I'd be shocked if that couldn't drive a PS/2 mouse with
an adapter, or if a Raspberry Pi couldn't provide it.
Another option is a USB 3 button mouse. I use an Evoluent Vertical
Mouse with Plan 9 and it works just fine.
- Dan C.
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