🚀 go-pugleaf

Joseph,

(Was it you that called me on the phone about this last week?)

Check the "ADDRESS" section on your Artec board (the UPPER section,
above the LS240 buffer chips).  There should be a jumper between
"E/" and "ground".  This enables the address decoding.  This
wire was accidently left off the wire list.

re: testscc.  You really should have a Z8530 manual with you there.
Call your local Zylog rep.  Run "testscc/tscc.c" and use it to write/read
one of the alterable registers on the SCC (such as register 'c'
(12) and 'd', the baud rate registers).  This will tell you
if the board and chip select are working ok.
Try different bit combinations to be sure you don't have
any open or shorted data lines.  Next you can
try one of the tests that sends some data ('p' for 'put').  

Sorry about the absence of documentation for tscc, it's only a
couple pages long and the commands are simple (such "rc " to read
register c and "wc 12" to write a value 12 into register c.)