[jyl]

Update - I got the vintage Model M, which looks like new - it was covered with a keyboard protector its whole life, I think - and found a SDL-to-USB cable that has the Soarers converter built in. Apparently I can use the Soarers firmware to create custom remapping, macros, etc. I haven't had time to fiddle with that, and am enjoying the keyboard too much to really want to do anything but type. The keyfeel is amazingly nice.