OpenGD77

Hello all, I just have got a new RT90 marked with V4A on the board. It works properly with Retevis V5 Firmware RT90-CSV-GPS(2571V5)-P26.41.bin (Download from retevis.net and uploaded to the RT90 - all other old versions do not TXing). I have also downloaded MD9600_firmware_V5HW.bin from this board. ...

Hello all,
i just have got a new RT90 with V4A marked on the board inside. Where I can get the V5 firmware version? The EA5GK links do not offer that. But some guys apparently have flashed this version with success.
Best regards - Ingo / DF1OG

Hello to all, I have installed the new Alpha on my RT3S. All work fine from the first moment. Congrations for this perfect job and many thanks in order to give the RT3S a new life!!! Perhaps a small whish regarding the key mapping to get compatibillity with the GD-77 / DM-1801: please change the fun...

Hi all,

I have opened my RD-5R and found an 8Mbit flash memory 25Q80DV. Did anyone try to replace this flash with a 25Q64xx or 25Q128xx in order to increase the memory for DMR IDs?

Best regards
Ingo DF1OG

Hi, on the webpage https://www.hamradioshop.pl/ they are offering the DM-1801. Obviously the new A6 Version with SN: 18DMxxxxxx. They are writing: the A6 Version is protected against updates with opengd. Therefore one should use an special CPS, which they have available for download by a link on the...

Dear Daniel,
I have fitted another GD with a 25Q128fvsg according the methode I described before. No problem at all . It seems to be a difference between the FWs and/or the CPSs.
73 Ingo

Hi Daniel, let me tell you my story. For the first step I flashed the GD with firmware from Nov. 2021 with the Nov. CPS. After that I backed up flash and calibration. Then I removed the old 1 MB flash and soldered the 25Q64fvsig into... phew! no pad destroyed. With the old CPS it was no problem to r...

Now I have read the flash from my old GD and tried to restore it with the new CPS. No problems at all. Someone roast me a stork...

And I have fitted a GD with the same W25Q64 before (and you are right, CPS was from 2021, where the 8/16 MB option was already implemented) and it worked. It seems that something has been changed meanwhile.

Hi Daniel, I can try that. But I have to re-solder the old flash and solder in the new flash for this try. I am afraid of destroying the pads at least... Then I would have a "bricked" GD. I do not understand, why the old flash can be programmed with opengd77 firmware/CPS without problems although th...