Our Chinese QQ interest group has solved the error problem of online brushing the latest official gongban_YT5760B_5750B-zh_ok-ota-v1.73.8, which is caused by the official change of the size of the 34th-39th partition in the rom.
Solution: Download the two partition files uploaded by my Google network disk and unzip the incoming line brush package. The files are divided into 2-4GB and 6-8GB.
Thank you for sharing. Can you tell how to use this patch and what it does?
These downloads include metazone.bin and preloader.bin. Do we unzip ota 1.73.8, insert these bins (metazone.bin will rewrite old one), zip and use to upgrade 1.73.7?
How does these 2 bins fix the problem?
ota 1.73.8 zip file contain preloader_1g.bin, preloader_2g.bin, preloader_4g.bin. I believe correct one must be used depending on HU DDR memory size. My guess (just my guess, it maybe wrong) is HU HW designer forgot to include configuration tell DDR memory size for <= 4GB HU. You include preloader_ac8257_demo_1g_32.bin, does this automatically detect 1/2/4GB?
Does QQ interest group know why 1.73.8 run faster than 1.73.7?
Only change seems to be partition table. userdata partition starting address shifted left by 5 bits in 1.73.8 compared to 1.73.7 (0xe0000000 instead of 0xdc800000) This create larger block address alignment. I wonder if this gain flash memory performance?
Best read speed from flash memory usually require advanced engineering work. There are may layers of software above the NAND flash memory blocks including OS file system (page, block size, write back policy), eMMC (has its own OS to manage NAND flash blocks, wear leveling and any logical features such as multiple partitions, security etc) If xyauto engineer spend time in this area, I'm sure performance boost is possible.
I posted few key chip spec on the mother board 1 year ago. Datasheet for the Foresee eMMC flash is available. You can see it offers multiple paritions, special security partitions etc.
Currently Installed Firmware Settings->System Info will show currently installed firmware YT5760B_AC8259 - Settings (google.com) 1.XX.Y is the currently installed release CANBUS shows the installed CANBUS version MCU shows installed MCU version Factory installed firmware seems to have J preceding