CPU/Hardware info for Seiko UC-2000

[Josh Dersch]

Hi all --

Got myself a Seiko UC-2000 ("Wrist Information System") w/UC-2200 
keyboard/terminal.  The UC-2000 is a souped-up digital watch with a 
dot-matrix display, and the Keyboard unit is basically a computer that 
uses the watch as a display.  (So it's more or less like the old 
Sharp/Casio BASIC programmables, only it uses a watch for a display 
instead of something built-in...)

But the watch itself is _also_ a small computer -- one can upload small 
binary programs from the Keyboard unit to the watch. From the little 
information I've been able to find, it has 2k of RAM, 7k of ROM, and a 
4-bit CPU running at 32kHz (yes, kHz).  Does anyone know anything about 
the CPU?  It'd be fun to write some little programs for this (assuming I 
can work out how to get them transferred over...)

(See http://www.pocketcalculatorshow.com/nerdwatch/fun2.html for a brief 
description of the UC-2000 and others in the same family...)

Josh