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3.15. Connection to Docking Station

Dag Brattli: "Connection to the Tekram IRDocking IR-660 . This device is a docking station with LAN access, printer, mouse and keyboard. You can also use them at the same time as the internal mouse and keyboard! Just fire up gpm -t ps2 /dev/irkbd and the laptop will make a keyboard/mouse connection to the IR-660. Now I just have to make gpm read both /dev/psaux and /dev/irkbd, and then make X11 read /dev/gpmdata, and I should have the thing configured!

... one problem: gpm can handle multiple mice, but Linux cannot handle multiple different keyboards. So if you have one norwegian keyboard and one remote US keyboard like I have, then things will be a little bit confusing. I got a hint from Alan Cox about a project that is implementing real support for multiple keyboards, so I'll check that out.

... OK, I sort of worked it out. By using TIOCSTI on /dev/console, you can insert scancodes directly into the tty queue. This can be a problem for virtual consoles that expect to receive some translated and cooked keycodes, but X happens to like raw scancodes, so this will work quite nice when using X but not for other virtual consoles. Anyway this is good enough for me, so I will not use a lot of time converting the scancodes to keycodes and index them with some keymap just to make it work with text only virtual consoles. As I see it the irkbd driver has now been successfully been ported to user-space :-)

... the Tekram IR-660 device can, in addition to attach a keyboard and mouse, also print using IrTTP (it can print using IrLPT, but that is not so funny since it requires exclusive use of IrLMP, and you don't wan't to stop the network, mouse and keyboard just to print a document). I'll try and see if I can get IrTTP printing working using a fifo as well.

... Tekram has added a control channel in addition to the data channel so that you can get some status information about what is going on. The name of their own protocol is P1248. It's published through the "P1248" class and "IrDA:TinyTP:LsapSel" LM-IAS entry, so you can try to find it.

... Canon is using the P1248 protocol, and their printer monitor program BrintBuddy2 (Japanese version) is using this protocol now. I don't know what they use for the data channel. Maybe they support TinyTP directly in addition to the other methods. You can try and look up the "IrLPT" class with the "IrDA:TinyTP:LsapSel" in the LM-IAS and see if you can find it."