Hi everyone,
I'm trying to create a simple SIO2USB cable based on the instructions on this website:
http://www.stephens-home.com/sio2usb/
I recently purchased a FTDI Basic Breakout board (http://www.sparkfun.com/products/9716) and now discovered that my board is slightly different than the one on Stephen's website. On Stephen's site it instructs you to connect the Atari SIO cable to 4 headers: TX, RX, GND and RI (Transmit, Receive, Ground, Command). The board I purchased has inputs for GND, CTS, POWER, TXO, RXI and DTR.
I'm guessing the mapping would be as follows:
TX --> TXO
RX --> RXI
GND --> GND
RI --> ?
Does that sound correct and does anyone know what the RI (Command) would map to on my board?