Z-80 Is Executing Properly....
I came down to Metrix Create:Space where I knew they had a scope. I looked at the inputs on SCK and CS on the MAX3110E chip. They look just like they should. I can see the clocks and the data writing 0x40 followed by 0x41.
…which is a problem. I should be writing 0x80 followed by 0x41….