I was using the core the other day and saw some suspicious behavior with the OUTI opcode. Seems the HL register is not incrementing. It just remains constant after the opcode executes.
I switched out the T80 core with the A-Z80 core out of curiosity and the code executed correctly.
Thanks, -Adam
The same problem affects the INI instruction
It looks as though T80 is not supported here any longer. There is a version on github where INI/OUTI are fixed, as well as other updates. I used it successfully as a replacement in my design.