Thu Mar 30, 2023 9:34 am
Well, in brief on my RB800 :
/system routerboard print
look for firmware type firmware-type: mpc8544
Download 7.8 (current) .npk for ppc from Mikrotik site
Open .npk with 7-zip and look for mpc8544-7.8.fwf file into etc folder.
Extract and copy it into "files" section of your RB800
/system routerboard upgrade
reboot
Now you can upgrade RB800 to 7.8 (current) ROS, I've done it via netinstall.