Hi Dom,
The main chips are Z80A, 8k ROM (half used for font tables) and 2k RAM. The other 7 chips are LSI and MSI LS TTL. The keyboard is tact switches with a laminated sheet on top. It works okay and you get a definite click unlike membrane keyboards.
I've got a program editor working! I can't run anything yet though
In the process I've conquered a number of syntactic elements - parse number, keyword, print number, etc. The fun part (the actual language) can start now.
Progress has been quick despite lack of debug facilities.