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[GH-ISSUE #1070] How to actually use chip documentation? #920

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opened 2026-02-26 00:33:55 +03:00 by kerem · 6 comments

kerem commented

2026-02-26 00:33:55 +03:00

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Originally created by @k8ieone on GitHub (Feb 4, 2021).
Original GitHub issue: https://github.com/hirschmann/nbfc/issues/1070

Hi, I'm trying to make a NBFC config for the Asus G2K. I already found where I need to write for controlling the fan, I just need to disable the EC's auto control.

I found a service manual online, which said that the EC in this laptop is ITE IT8510TE. I found this doc for it online.

I think this is the register I was looking for:

My question is: How do I get from that info (offset: 10h, bit: 7-6) to something I can actually locate in the output of ec-probe dump and write to with ec-probe write?

I'm looking forward to hearing from anyone.

Originally created by @k8ieone on GitHub (Feb 4, 2021). Original GitHub issue: https://github.com/hirschmann/nbfc/issues/1070 Hi, I'm trying to make a NBFC config for the Asus G2K. I already found where I need to write for controlling the fan, I just need to disable the EC's auto control. I found a service manual online, which said that the EC in this laptop is ITE IT8510TE. I found [this doc](https://www.qdatasheet.com/datasheet-download/889363/1/ITE/IT8510TE) for it online. I think this is the register I was looking for: ![image](https://user-images.githubusercontent.com/28711937/106965236-98441300-6743-11eb-9b3f-5721c50b9100.png) My question is: How do I get from that info (offset: 10h, bit: 7-6) to something I can actually locate in the output of `ec-probe dump` and write to with `ec-probe write`? I'm looking forward to hearing from anyone.

kerem

2026-02-26 00:33:55 +03:00

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kerem commented

2026-02-26 00:33:56 +03:00

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@webloft commented on GitHub (Mar 12, 2021):

The address offset in this documentation may be not the same offset you get via software.
If so you would need to set the bits 7-6 of a single byte which means other bits may be necessary to keep.

So if the register value is 0x3B for example and you set bits 7-6 to 10 you'll get 0xBB
and would write that as (offset 10h = 0x10)

ec-probe write 0x10 BB

@webloft commented on GitHub (Mar 12, 2021): The address offset in this documentation may be not the same offset you get via software. If so you would need to set the bits 7-6 of a single byte which means other bits may be necessary to keep. So if the register value is 0x3B for example and you set bits 7-6 to 10 you'll get 0xBB and would write that as (offset 10h = 0x10) ec-probe write 0x10 BB

kerem commented

2026-02-26 00:33:56 +03:00

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@k8ieone commented on GitHub (Mar 22, 2021):

Hi and thanks for your response.

I just tried ec-probe write 0x10 BB, but I got this error:

usage: ec-probe.exe [--version] [--help] <command> [<args>]
Argument value value "0B" cannot be converted to the required type System.Byte.

I also tried writing to different registers, but it looks like I can't write BB anywhere.

@k8ieone commented on GitHub (Mar 22, 2021): Hi and thanks for your response. I just tried `ec-probe write 0x10 BB`, but I got this error: ``` usage: ec-probe.exe [--version] [--help] <command> [<args>] Argument value value "0B" cannot be converted to the required type System.Byte. ``` I also tried writing to different registers, but it looks like I can't write `BB` anywhere.

kerem commented

2026-02-26 00:33:56 +03:00

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@webloft commented on GitHub (Mar 23, 2021):

Then you need to write

ec-probe write 0x10 0xBB

@webloft commented on GitHub (Mar 23, 2021): Then you need to write ec-probe write 0x10 0xBB

kerem commented

2026-02-26 00:33:56 +03:00

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@k8ieone commented on GitHub (Mar 23, 2021):

Indeed, I do. Sorry, I was half asleep when I was trying this.

Now, I found that the default value of 0x10 is 00. So from what I understand, to change bits 7 and 6 to 1 and 0, I have to write 40 (or 80 if you were counting from 0), right?

EDIT: The docs do count from 0, so I assume you did too.

@k8ieone commented on GitHub (Mar 23, 2021): Indeed, I do. Sorry, I was half asleep when I was trying this. Now, I found that the default value of `0x10` is `00`. So from what I understand, to change bits `7` and `6` to `1` and `0`, I have to write `40` (or `80` if you were counting from 0), right? EDIT: The docs do count from 0, so I assume you did too.

kerem commented

2026-02-26 00:33:56 +03:00

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@webloft commented on GitHub (Mar 23, 2021):

7-6 looks like the common bit notation (starting right with position 0)

position 7 = 1
position 6 = 0

So the correct value should be 0x80.

@webloft commented on GitHub (Mar 23, 2021): 7-6 looks like the common bit notation (starting right with position 0) position 7 = 1 position 6 = 0 So the correct value should be 0x80.

kerem commented

2026-02-26 00:33:56 +03:00

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@github-actions[bot] commented on GitHub (Sep 21, 2021):

This issue is stale because it has been open more than 180 days with no activity. If nobody comments within 7 days, this issue will be closed

@github-actions[bot] commented on GitHub (Sep 21, 2021): This issue is stale because it has been open more than 180 days with no activity. If nobody comments within 7 days, this issue will be closed