> Thanks for the separate post. This is definitely super-cool, and I'm glad it's
> showing signs of working already (Maybe pull the Z80 and see if location 0 still gets
> overwritten?)
I actually had the same idea 
Guess I have to build another interface (for a seconds comm board)...
Figured out, the first two bytes are overwriten by the Z80.
It seems to work as that the 0x0101 I write to 0x0000 (master, "begin connect") gets instantly replaced by a 0x0105 (master, "linking phase").
but it won't change after that... maybe the real boards cannot link to themselves 
And I figured out my brand new china cheapo logic analyzer does NOT support 5V I/O... bah... (sniffing the Z80)
I do all that stuff even without a Joystick 
Soft-15kHz, cabMAME, For Amusement Only e.V.
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Re: "Interfacing" the model1 comm board
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