How to retrieve the license code (HW 2.72) from operational DS203

DF7TH

If your DS203 ist operational you can retrieve the license code from a ROM image which can be created using Wildcat Scope APP V5.3 or newer.

(1) Start your DS203 with an appropriate Wildcat-Scope-App (V5.3 or newer)
(2) Make sure there is enough space on the virtual disk (512 MB needed)
(3) Hold the 3rd buttun (* circle) until  "Save File000.CFG" appears at Screen buttom
(4) Press 4th button (triangle) once so ".CGG" is flashing and
      use left toggle switch (- * +) to select " ROM" and press left toggle Switch Center button.
      Wait until the file is completely written to the virtual disk.

(5) Copy the ROM Image file "ROM_IMG.BIN" to your PC
      and use a HEX Editor to open the ROM image file.

(6) To retrieve your license code reverse the byte order of the four Bytes
      starting at address 0x00003800.
      e.g.
      00003800: FF FF FF FF  A1 B6 DF 8B  FF FF FF FF  FF FF FF FF
      gives the license code   8BDFB6A1

NOTE:
For DS203 HW version 2.72 the license code can be found at the hexadecimal address 0x00003804
(in reverse Byte order / INTEL BIG ENDIAN notation) within a larger block of "FF"s.

For other HW versions with a different memory layout / assignment this address may differ.

On HW 2.72 (perhaps on others too) the 4 byte license code is actually the only data
in the middle of a larger ""FF" block ranging from about 0x000032B0 to 0x00003FFF.

Hope this helps some people.
Joe