MiSTer FPGA Forum

I'm planning to create a small board to adapt buttons from my arcade controls to Mister and would like to use polled I/O rather than via USB. I don't ever expect this to go mainstream so it doesn't particularly matter but I am wondering which pins would be most appropriate... I need 3 pins... clk, sync and data.... Would... Arduino_IO13 AH12 USER_I...

Ah... they are on the schematic just labelled A11 and A12... ok. np

My first post so posting in Newcomers as not sure where h/w questions go... In the longer term I'm planning on creating a board that will include SDRAM and in the first instance I am trying to understand the schematic of xs_2.2... pin15 LDQM and pin39 UDQM do not appear on the schematic but looking at the PCB it seems they are connected to the A11 ...