I was talking about sBitx, which requires at least 2GB of memory. If you know Ashhar, you know that He likes to minimize tools. What we are talking about is that there is no 7" LCD display, so it requires less memory.
Then Ashhar will tell the rest, because it is in His head.
And what you saw in the video is a digital module that connects to the RPi and the radio.
He calls it zBitx. I would rather call it tBitx ie tiny Bitx. ;-)
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Gyula HA3HZ