USB-to-PS/2 Convert USB keyboard and mouse for connection to a PS/2-based system

[legacy]

hi guys
I have a pretty "Graphite" USB Keyboard + optical mouse and I'd like to use them on a machine that has PS/2 kb&mouse
Idea? suggestions? Any good project around?

thanks

edit:
better described: I am looking for an adapter (or a project) designed to convert USB devices to a PS/2  interface, enabling you to use USB-based keyboard and mouse via a pair of PS/2 ports.

[electr_peter]

PS/2 is not that hard for as a protocol to implement in MCU. Connect MCU to PC and translate USB keyboard/mouse messages to PS/2 protocol.

There are cheap USB-to-PS/2 adapters on the market, but these actually contain only wiring/contacts (no active elements). This is because older USB type mouse devices support both USB and PS/2 protocols via the same pin-out. But I don't think this would help you with your problem.

[kolbep]

get a 4 port usb pci card

[legacy]

emmm, there is NO PC, there is an embedded device with with 2 PS/2 ports

the problem is on the USB side.

[legacy]

oh, interesting toy 

[legacy]

Convert USB keyboard and mouse signals for connection to a PS/2-based system

The PS22USB PS/2 to USB Keyboard and Mouse Adapter converts a USB keyboard and mouse to PS/2 connections allowing you to connect a newer USB-based keyboard and mouse to legacy systems that only have PS/2 connection ports available. Newer USB keyboards and mice cannot simply use simple adapters to connect to PS/2 ports, as the signal is of a different nature, so active conversion is required for full functionality. Supporting plug and play installation with no software or driver requirements, the PS/2-USB adapter offers a cost-effective way to bridge USB peripherals with a PS/2 based computer. For systems that have both PS/2 and USB connections, this compact device can also be used to free up 2 USB ports. Backed by a StarTech.com 2-year warranty and free lifetime technical support.

The StarTech.com Advantage

- No drivers or software makes connecting a USB keyboard/mouse via PS/2 truly plug-and-play
- Compact design with no external power requirements for a simple, all-in-one solution
- Support for USB combo keyboards/mice ensures compatibility with the most peripheral devices

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

[wblock]

Is there something special about the USB keyboard?  Why not just find a PS/2 keyboard at a thrift store?  PS/2 mice are less common, but there is probably one in the bottom of a thrift store box also.

[westfw]

An add-on USB card is cheaper.  Or hub.  Does the PC really not have any USB ports?  And it's still useful?!
(Just because a MB has PS/2 ports for mouse/keyboard does NOT mean that it can only use PS/2 devices.  Most bioses even include enough USB support to make it look like USB things are actually PS/2 things (to SW that uses the BIOS for access, anyway.) (a thing that can bite you if you were expecting to use "bare metal" PC hardware :-)))

[Ian.M]

4th post the O.P. states its *NOT* a PC but is an embedded device.  Adding a USB controller is *NOT* an option.