USB to PS/2

Additional operating system/hardware discussion (Windows, Linux, *BSD and others)
Forum rules
Any posts concerning pirated software or offering to buy/sell/trade commercial software are subject to removal.
robespierre
Posts: 1578
Joined: Mon Sep 12, 2011 2:28 pm
Location: Boston

Re: USB to PS/2

Unread postby robespierre » Thu Nov 05, 2015 11:48 am

Some keyboards automatically switch to PS/2 mode when they detect an adapter is being used.
:PI: :O2: :Indigo2IMP: :Indigo2IMP:

robespierre
Posts: 1578
Joined: Mon Sep 12, 2011 2:28 pm
Location: Boston

Re: USB to PS/2

Unread postby robespierre » Thu Nov 05, 2015 12:19 pm

Unfortunately you can never get N-key rollover with USB keyboards because the HID class doesn't support it.
:PI: :O2: :Indigo2IMP: :Indigo2IMP:

robespierre
Posts: 1578
Joined: Mon Sep 12, 2011 2:28 pm
Location: Boston

Re: USB to PS/2

Unread postby robespierre » Thu Nov 05, 2015 1:56 pm

You don't need that much hardware to do it. Any USB-capable MPU like an ATmega16U4 should be enough.
:PI: :O2: :Indigo2IMP: :Indigo2IMP:

kubatyszko
Donor
Donor
Posts: 462
Joined: Sat Nov 12, 2011 3:18 am
Location: Los Angeles
Contact:

Re: USB to PS/2

Unread postby kubatyszko » Thu Nov 05, 2015 2:15 pm

It would be easier so build a replacement keyboard controller that you would snap in, with ps/2 output, the only problem is that it would have to be dedicated to a specific keyboard - might not be worth it...
(These is one controller like that for happy hacking keyboards, I have one, it's with USB but the advantages are bluetooth and fully remappable keys).
Designer of Fuel ATX PSU adapter board : viewtopic.php?f=3&t=16732341
(now ships from USA), In stock!

User avatar
jan-jaap
Donor
Donor
Posts: 4939
Joined: Thu Jun 17, 2004 11:35 am
Location: Wijchen, The Netherlands
Contact:

Re: USB to PS/2

Unread postby jan-jaap » Thu Nov 05, 2015 2:22 pm

ivelegacy wrote:Found a device that achieves my purpose: "PS22USB-PS" made by STARTECH dot COM
(it's very expensive, ~80-120 USD, I'd like to replicate it with cheaper technology)

That's only expensive if your time is free.

What I'd like to know is whether something like that works. Always. 100%. Even with IRIX systems hell-bent on using an arcane mode of the PS/2 keyboard.
:PI: :Indigo: :Indigo: :Indy: :Indy: :Indy: :Indigo2: :Indigo2: :Indigo2IMP: :Octane: :Octane2: :O2: :O2+: Image :Fuel: :Tezro: :4D70G: :Skywriter: :PWRSeries: :Crimson: :ChallengeL: :Onyx: :O200: :Onyx2: :O3x02L:
To accentuate the special identity of the IRIS 4D/70, Silicon Graphics' designers selected a new color palette. The machine's coating blends dark grey, raspberry and beige colors into a pleasing harmony. (IRIS 4D/70 Superworkstation Technical Report)


Return to “Miscellaneous Operating Systems/Hardware”

Who is online

Users browsing this forum: No registered users and 2 guests