OSDev.org

supagu · Post by **supagu** » Sun Apr 08, 2007 8:23 pm

im getting started with a USB implementation because i have a USB keyboard and mouse.

Currently my OS only supports text output so im very new to things, only got me os compiling the other day.

I've read up on the specs and stuff, it all sort of makes sence. But all the documents seem to lack is the super low level stuff.

any way, It appears USB stuff happens on IRQ10, but i get no interupts on irq10 when i run my os and mash some buttons on the keyboard.

Alboin · Post by **Alboin** » Sun Apr 08, 2007 8:31 pm

No low level stuff? Did you check here on the Wiki?

pcmattman · Post by **pcmattman** » Sun Apr 08, 2007 8:35 pm

When I test my OS I use a USB mouse, PS/2 keyboard. Can I recommend that you turn on Legacy USB support in your BIOS settings? This basically emulates PS/2 functionality on the mouse and keyboard if they are USB devices. I use it for my mouse and it works perfectly. Once you have working input via PS/2 (and memory management etc...) you can then branch out into supporting USB devices.

mystran · Post by **mystran** » Sun Apr 08, 2007 10:26 pm

My keyboard, if it's connected to USB port, works as a PS/2 keyboard, until you do a reset on the keyboard controller. Once you do that, my BIOS decides to stop it's Legacy emulation, and you are left without a keyboard.

Easily solved by plugging the keyboard into PS/2 port with an adapter (that came with the keyboard) though some stuff like the wheel doesn't work properly that way (if it's connected as PS/2 it simply sends up/down key events.. in USB the keyboard actually identifies as two decides: a keyboard and mouse, and the mouse never sends anything but wheel events). Not that I use any of that stuff normally..