Just to expend on Kolla... 
The Keyrah is a piece of hardware that takes the ribbon from the A1200 keyboard and allows the Amiga keyboard to work on a PC which is really useful for emulation packages like WinUAE (Amiga Forever), Fellow, etc. Best of all, it also has 2 joystick ports built in for attaching your old "Atari" style controllers. If you look a couple of post up you'll see a picture of an open A1200 case (mobo gone) and the Keyrah sitting in the top right-hand corner.
From the testing I've done, jamming a PS2 adapter on the end doesn't work and I'm sure I recall Jens (the designer) saying a PS2 adapter wouldn't work. Considering the Keyrah has an On/Off switch I suspect it is a power issue.
Aha!!! (in the style of Alan Partridge)
Thanks for the explanation Darrin - now I know. (cue penny dropping - down the grid as usual).
So basically, it's the Keyrah that doesn't support the PS2 protocol?
But why would anyone want to use a creaky old amiga keyboard instead of a really nice Microsoft/Logitech one?
