MEK6800D2 restoration

[Wim]

I've followed Tony's advice and went step by step, one board no chips, 
chips loaded, second board no chips, measuring at each step.  Finally 
all seemed fine, I fired it up and now I've got RAM from 0000 all the 
way to 7FFF :)

Next essential thing is the Load routine (from audio) that doesn't seem 
to work. I wrote a routine to read bytes from the ACIA just like the 
JBUG load routine does and simply quits when the first byte is read.  It 
loops until I start to play the audio file, so it actually detects that. 
However when I make it loop until it finds a non zero data byte, it 
never stops. So I thought all the analog stuff is working up to the ACIA 
and the latter must be broken. Tried replacing it with no success so 
far. Anyway, the kit is so well documented that I should have no excuse 
of not being able to pinpoint the problem, learning a lot along the way...

Also, what are the best tools to encode/decode KCS audio ? From the ones 
mentioned on the wikipedia KCS page I had success only with the perl 
script, but that's only one direction.

Wim.