41CL self-update via embedded serial port

[rprosperi]

(12-05-2017 10:09 PM)smp Wrote:  At the end of the update, as the calculator reported the update was finished, I did the CDBEXP and saw in the report that I still have one outdated file: YFNZ. I did another FLUPD, but the calculator came right back and reported the update was complete again. I finished the cleanup activities and then re-initialized my MMU.

YFNZ is one of the OS ROMs, so is protected from erasing unless you specifically allow it to do so. In the UPDATE ROM manual, see the commands OSPROT and OSUPDT on p. 37. Basically, you just need to enable OS updates via OSUPDAT, do the update again (for YFNZ), then use OSPROT to restore the protection.

Of course, also make sure you do not have YFNZ enabled when doing so.