ASUS RT-AX86S still shows old value after RAM upgrade

[shuaigebo]

I have an RT-AX86S, and I upgraded the memory from 512MB to 1024MB. After the upgrade, it started up normally but the system still displayed 512MB. How can I make 1024MB work.

 

[ColinTaylor]

Asus routers don't have upgradable memory. If you replaced the memory chips you also need to hack the CFE code to reflect that change. See again this thread where you originally posted this question.

 

[chavo]

What memory did you install? Full name

 

[shuaigebo]

5SA47 D9STQ
I think the bootloader must be config.

 

[chavo]

Are you using firmware for ax86u ?

I think you need to compile the firmware. Run it before compiling.

  cd ~/asuswrt-merlin.ng/release/src-rt-5.02L.07p2axhnd/targets/cfe/sysdeps/RT-AX86U
  sed -i 's/\x27\x14\x00\x00\x00\x00\x00\x00\x4A\x01/\x27\x15\x00\x00\x00\x00\x00\x00\x4A\x01/g' cfe4908.bin
  sed -i 's/\x27\x14\x00\x00\x00\x00\x00\x00\x4A\x01/\x27\x15\x00\x00\x00\x00\x00\x00\x4A\x01/g' cfe4908ram.bin
  sed -i 's/\x27\x14\x00\x00\x00\x00\x00\x00\x4A\x01/\x27\x15\x00\x00\x00\x00\x00\x00\x4A\x01/g' cfe4908rom.bin
  sed -i 's/\x27\x14\x00\x00\x00\x00\x00\x00\x4A\x01/\x27\x15\x00\x00\x00\x00\x00\x00\x4A\x01/g' precfe4908rom.bin

But since I haven't tested it, there are no guarantees. In the worst case, you'll need to completely flash the NAND

 

[shuaigebo]

RT-AX86S uses the firmware of RT-AX86U. I refer to your method of upgrading 2G to find the firmware code 27140000000000004A01 and replace it with 27150000000000004A01, but it does not work. Cfe4908.bin cfe4908ram.bin cfe4908rom.bin precfe4908rom.bin. I used Winhex to search for 27140000000004A01, where there are three places for cfe4908.bin and three places for cfe4908.bin. I couldn't find the other two files, but I don't know how to compile firmware. Can you help me compile and replace the firmware for cfe?

 

[shuaigebo]

I have an RT-AX86U, can I backup partitions and write them directly.use dd if=/dev/mtdblockX of=/tmp/mtdblockXbin and dd if=/tmp/mtdblockX.bin of=/dev/mtdblockX.

 

[chavo]

I have an RT-AX86U, can I backup partitions and write them directly.use dd if=/dev/mtdblockX of=/tmp/mtdblockXbin and dd if=/tmp/mtdblockX.bin of=/dev/mtdblockX.

no
you need to remove the NAND and read the firmware completely
if the router does not start. You need to check the startup in recovery mode (I don't remember exactly what it's called). If this mode does not work, then you need to remove the NAND and write the firmware there.

 

[chavo]

AX86S 1GB
md5: cb8101d740228b7049fe67e77024fb42

74.47 MB file on MEGA

mega.nz

 

[shuaigebo]

good works，I refreshed this firmware and it is working properly.

I don't know how to compile firmware. Can I use winhex to modify the already compiled firmware to achieve the same effect? For example, RT-AC86U can backup mtdblock4 and mtdblock5, search 27140000000000002301 and change it to 27150000000000002301, and then flash it back.

 

[chavo]

I tried to change mtdblock on the ax router, after that the router did not start

 

[RMerlin]

备份 mtdblock4 后，我将 27140000000000004A01 修改为 27150000000000004A01。我找不到 mtdblock5 的代码，所以我把它刷回去，它启动了，但内存仍然显示 512MB。所以我只能学习如何编译固件。您有什么好的参考资料吗？

Please repost in English.

 

[chavo]

How compile

Compile Firmware from source

Third party firmware for Asus routers (newer codebase) - RMerl/asuswrt-merlin.ng

github.com

 

[shuaigebo]

How compile

Compile Firmware from source

Third party firmware for Asus routers (newer codebase) - RMerl/asuswrt-merlin.ng

github.com

thanks.

 

[shuaigebo]

I encountered a problem while compiling firmware, as shown in the picture. What can I do?

 

[Tech9]

What can I do?

Use the firmware @chavo compiled for you.