Adapter to use A2000 keyboard on a 1200?

[kolla]

Easy route is to get a subway and use a USB keyboard.

[kolla]

I wouldn't advise that subway for the Amiga 1200 to anyone, bought one from Amigakit, installed it and it smoked like a big dog. Then I looked at my connections and saw that I missed an end pin on the A1200 and smoked the ribbon cable that connects to the clockport, Ya know this stuff never happended when I was younger, the old eyes just can't see that good any more. Actually I did not like the instructions that came with it. Finding pin #1 was quite difficult, and the instructions where vague, (I know who reads instructions, thats for wimps).

Sounds to me that you didn't really read the instructions :rtfm:
http://www.e3b.de/usb/soft/sw_manual.pdf

[kolla]

I got the impression that the original question was how to connect an external keyboard to an A1200 as an addition to the original keyboard, not as a replacement. But I cold be wrong.