9 Dec
2008
9 Dec
'08
7:38 a.m.
Joachim Thiemann wrote:
On Tue, Dec 9, 2008 at 8:38 AM, Jules Richardson
<jules.richardson99 at gmail.com> wrote:
Hmm, that would make sense - subject for the keyboard supporting any kind of
'USB mode'; there must have been quite a few years where PS/2 keyboards
existed but there was just no concept of a "USB keyboard".
There must presumably be a USB keyboard protocol standard though (otherwise
every USB-connected keyboard out there would need proprietary drivers) - so I
assume that the more expensive PS/2-USB adapters really do interpret the PS/2
protocol and convert it to such a standard, and are primarily designed for
keyboards which aren't natively USB-aware...
(so, in the case of my Model M keyboard, I need one of these expensive
'intelligent' adapters, rather than a 'dumb' one)
cheers
Jules
Alexandre Souza wrote:
I always thought the cheap keyboard-specific PS/2-USB adapters (that
usually came with keyboards) are simple wiring jobs (give or take a
resistor) which get detected by the keyboard chip - it then switches
from USB to PS/2 mode. It's cheap, only adding a bit of firmware to
the keyboard. (Pretty sure mice did this, too) With PS/2-to-usb converters avaiable for $3?
Why???
Hmm, all the ones I've been finding are in the $20 range, modulo a
couple
which are much cheaper but which claim to be for specific keyboard vendors
(I'd assume they rely on specific OS/vendor drivers, rather than adhering to
some kind of "USB keyboard standard")