CBM D9090 Update

I have spent time on my 2nd D9090, here are some pictures.  The Tandon 
603S is bad, so says the header program.
http://vintagecomputer.net/browse_thread.cfm?id=298
I was able to duplicate the same results with another bad Tandon 603s.  
At least the controllers are OK so they seem.
Bill


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