MiSTer FPGA Forum

Thank you for your reply Antonio.In fact I almost bought your MiSTer Slim package but in the end decided to go with the standard boards (for now). It looks like your board uses the Arduino D0..D7 for the second user port as I suggested above. And your io2db9 board also does it but provides a DB9 connector. Adding this like to the existing analog I/...

The request is to add a second user port to the function already provided by the analog I/O board. The original append had one suggested approach by using the MCP23009 port expander and thereby freeing up some of the I/O pins on the GPIO 40 pin header. This would necessitate creating a new I/O board. I did think about using other available I/O pins...

I am fairly new to MiSTer but not to electronics or software. I have also written a bit of Verilog. In comparing the analog and digital i/O boards some detailed differences and similarities come to light such as the use of the I2C MCP23009 I/O expander and the 7 I/O on the 10pin Arduino connector for the user port. I would like to add a MT32-PI whi...