[Coco] OT SWTPC

[Ron Bihler]

I have a SWTPC 6809 system that I have been trying to get up and running 
again.  It was working at one point, however it seems to be a downhill 
battle since.  Cleaned the contacts (Many times now)
I am not able to get the monitor program running (s-bug).  I don't get 
anything out the serial port and suspect I may have a memory issue - 
running a logic analyzer it seems to be in the boot up loop or so I am 
thinking. 

The monitor program goes through memory checking for the highest 
location to start the load (Memory is mapped from 0000-up) Then it will 
send out the serial port the monitor prompt to start. 

Long story short, I was wanting to confirm that the serial section of 
the system is working and was thinking to modify the boot rom to send 
data at startup.  There is a chance that the system is working, but just 
not talking. 
This is pushing my knowledge of 6809 code - I can follow along but not 
sure I am able to do this myself. Without the system working I would not 
know if it was a hardware issue or my code was bad :)  I was hoping 
there was a kind person in this group that might be able to help.  My 
hopes are to get os9 running on this as well, it's current setup for 
flex - but that's not the same thing ;)

Ron