[bug #53703] FT232H based programmer returns all 0xFF when reading flash from atmega2560

[Joerg Wunsch]

Update of bug #53703 (project avrdude):

                  Status:                    None => Need Info              

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Follow-up Comment #1:

Well, I think the logic behind this still has some issues.

Looking at "native" programming algorithms (in avr.c), the usual decision
logic is:

++++
  /*
   * If this device has a "load extended address" command, issue it.
   */
  lext = mem->op[AVR_OP_LOAD_EXT_ADDR];
  if (lext != NULL) {
...
----

Issuing the load extended address command only for few selected addresses is
error-prone: not every load file has to start at addr==0, for example.

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