Hi Albert,
I've been trying to figure out why I could not erase sectors in my flash greater than SA70. It turned out that this was on a megabyte boundary, and in fact, was exactly half way through my flash.
The flash is a 64Mbit part, i.e. 8MB, and I could only access the first 4MB of it, even though the ORION5X_SZ_BOOTROM parameter was set to (8 * 1024 * 1024). By "access" I mean that even md.b commands simply returned "00", and flash erase commands returned immediately without actually doing anything.
Doubling the value for ORION5X_SZ_BOOTROM allowed me to access the additional sectors, but that makes me wonder what the reason for it is.
I know that the flash chip is wired up strangely, but would that also affect the window mappings? If that is the case, I just need to document WHY the parameter is doubled, but if not, it would be good to understand the real reason for the change.
Rogan