Hello from Italy. A desperate radio amateur friend brought me, as a last hope, an Orion 565 who managed only with external programs via rs232 and was even sent to Germany by a Ten Tec repairman who returned it as unmanageable .... absurd I thought.
Here's what happens when you try to load .ruf at the end of the load, and returns the word that the program does not have the right size. Now, after several attempts, I noticed that if you previously allowed memories to be deleted, now only loads .ruf.
I guess the problem resides there and I tried replacing the flash but I saw that the boot program probably resides there.
Do you have to program through JTAG? Or can I buy a flash already programmed?
I have knowledge and electronic lab also for smd could you tell me what to do ??

Many thanks.