[ CMOS clock][CMOS RAM][COIN RTC]In win11 system, I want my windows to read my COIN RTC time during the boot process and update to this time

IwanYuan 0 Reputation points
2024-01-10T14:31:51.01+00:00

HI everyone:

I modified the interface of the underlying ACPI to make the time data returned and set by ACPI come from the COIN RTC designed by me.

  1. I found that I could not manually trigger windows to read the RTC time in the windows interface?
  2. I found that windows booted sometimes read the time (when I opened the windbg tool to grab the ACPI log), but the windwos time is still not updated to the RTC time?
  3. I changed the clock source of my W32TM to LOCAL, but when I run w32tm /resync command, it will prompt that there is no available time;

[Expectation]

I just want windows to read the RTC time and update it to the RTC time when it boots up.

Windows Server
Windows Server
A family of Microsoft server operating systems that support enterprise-level management, data storage, applications, and communications.
13,727 questions
Windows 11
Windows 11
A Microsoft operating system designed for productivity, creativity, and ease of use.
10,782 questions
0 comments No comments
{count} votes

1 answer

Sort by: Most helpful
  1. Ian Xue 39,471 Reputation points Microsoft Vendor
    2024-01-12T06:41:46.5933333+00:00

    Hi IWanYuan,

    Thanks for the post.

    Based on my research, The RTC (Real time clock) which is implemented in hardware and is battery backed up. It keeps time even when there is no power. When a PC is turned on the current time is read from this chip. In the very first PCs it was part of the CMOS RAM chip. But in newer PCs all the functionality of often in the 'South bridge' chip, along with many other functions. If you would like to make the time data returned and set by ACPI come from the COIN RTC designed by yourself, this issue is more related to development, kindly open the Edge and press Ctrl+Alt+I to open the Microsoft Feedback Hub and feedback the development issue. Thanks very much for your understanding.

    Best Regards,

    Ian Xue


    If the Answer is helpful, please click "Accept Answer" and upvote it.


Your answer

Answers can be marked as Accepted Answers by the question author, which helps users to know the answer solved the author's problem.