Just a quick post to let people know that I finally got around to making an installer for the GD-77 Flash Manager software, that allows the 1 M byte Flash memory in the GD-77 to be backed up and restored etc.
The installer can be downloaded from here
I’m am also compiling an archive of backups that people have taken of their transceivers.
This is mainly to look at the variations in the calibration data stored at 0x8f000 and also the backup calibration at 0x51000
Jason VK7ZJA wrote some instructions on how to use FlashManager to fix problems with the calibration in his page
Which I will paste here, to save everyone some time 😉
Step 1: Download Flash Manager and install.
Step 2: Turn off the corrupted GD-77, connect programming cable to the radio and to the PC. Do not turn on the GD-77 yet.
Step 3: Hold down the side blue key, green menu key (above left arrow button) and the * / lock key (just below the right arrow button) while turning on the GD-77. The radio will appear to power up normally.
Step 4: Launch Flash Manager.
Step 5: Read the entire flash. Set Start address (hex) to 0, and set Length (hex) to 100000 – that’s one followed by five zeroes. Click the Read button, and wait about 5-6 minutes for the read to complete.
Step 6: Export the read data to a file using the Save File button. Call the file something like YOUR_CALLSIGN_GD77_Flash_Backup.bin In Windows the file should show as being 1.0 Mbyte in size.
If anyone doesn’t have my email address and would like to send me their backup, please post a comment, (where there is a box to enter your email address) and I will send an email to you, which you can reply to.
Let me know if you are happy to share your backup publicly , as I will put them with the other files I have