More info...

README.md

@@ -4,6 +4,12 @@ Resources for the Tytera (TYT) MD398 (aka Radioddity GD-55).
 
 ## General Information
 
+The radio uses a vastly different design than the familiar MD380/MD390. It uses the AT1864S radio SoC.
+It is a familiar chip used in many Wouxun/Baofeng model, however to the key difference that this
+newer S series provides an IQ baseband interface.
+
+It appears to be using an integrated ARM M7 built into the HR-C3000.
+
 The programming cable is actually a common USB to TTL serial interface (**not** an actual USB device).
 It's still not impossible the radio could appear as a DFU usb device for uprgades however.