Hello!
I used the search before, and haven't found anything really useful to this keyboard except for solutions incorporating Soarer's converter. If there's a relevant/duplicate topic, I'm sorry for double posting.
I've found an IBM Model M Host Connected Keyboard (122 keys, ID: 1397003, German layout, 1996, original IBM) which I found in the storage hall of the company I'm doing my internship at currently, which laid for god knows how long around there. A few days ago, I found the missing cable for it, and could test it's functionality, and so far it's working flawlessly, either when I type or play games with it (even the plastic rivets are all intact)!
My question would be: Is it possible to remap all keys (more specifically F13 - F24 and the additional 10 keys to the left) on the keyboard, using software or registry hacks only? I tried using the additional 10 keys to the left and F13 - F24, and they don't seem to be recognized by Windows 8.1 at all. Even SharpKeys hasn't recognized them. It'd be a shame if I couldn't use such a fine keyboard to it's fullest extend. :/ Could it be it's because I use a PS/2 to USB converter cable?
For people who are interested: I can provide screenshots of the keyboard and label. As far as I know, this is a really rare variant of the 122-key Model M, which might be even pretty valuable, even seen one on eBay.com for more than $600... Can anyone tell me more about it?