There was a post recently from someone building an SIO2uSD with an SD shield, and it prompted me to do this.
I thought I would give you all a standard config file to start with. Copy this to the root of your SD card. This will help those of you who are wanting to “test in steps” as you put one together. You could actually use an SD shield, wire up the 4 needed wires to SIO and boot up without even an LCD display. If you left it as is, it would just be an SDRIVE-type device.
This is setup to:
- Boot from SDRIVE.ATR file that MUST be in your Atari folder on the SD card
- Boot at HighSpeed if routines are present
- Do not show detail of SIO routines, other than SDrive
- D1 contains sdrive.atr
- D2 D3 D4 empty
Download the file below and rename it to sio.cfg and copy it to the root of your SD card. This site does not allow me to upload a .cfg extension file, so I renamed the extension docx to get it uploaded
Click on the link and save it without any changes : sio config file