X370 Taichi C0 Bug
Printed From: ASRock.com
Category: Technical Support
Forum Name: AMD Motherboards
Forum Description: Question about ASRock AMD motherboards
URL: https://forum.asrock.com/forum_posts.asp?TID=5516
Printed Date: 19 Jul 2025 at 10:52am
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com
Topic: X370 Taichi C0 Bug
Posted By: Mraoul
Subject: X370 Taichi C0 Bug
Date Posted: 05 Jul 2017 at 9:55pm
" rel="nofollow - Not sure what triggers this issue, but I ran into this recently with my X370 Taichi + 1700X. Basically, the machine would not reboot and would hang on a 'C0' error code, forcing me to power the machine off completely any time I wanted to reboot. This error code is not listed in the Dr. Debug code list, so I have no clue what it indicates. Clearing/Resetting the CMOS seems to have fixed it, but since I don't know what the trigger is, it might come back.
Has anybody else run into this? Or at least know what the C0 debug code means?
|
Replies:
Posted By: wardog
Date Posted: 06 Jul 2017 at 1:07am
" rel="nofollow - I'll toss this out here, this is from some AMI docs I have here
C0 = Early CPU Init Start -- Disable Cache ??Init Local APIC
This c0 comes up here, rarely.
Try this.
Go into the BIOS and choose Reset to UEFI Defaults, then Save and Exit. Do this twice please. Each time allowing it to go/boot into the OS.
Afterward, and using Instant Flash from WITHIN the BIOS, re-flash your current BIOS revision.
Post back after a/the time you are accustomed to it doing this issue please.
|
Posted By: Mraoul
Date Posted: 06 Jul 2017 at 1:45am
I mentioned in my post -- resetting the UEFI (via jumper) fixed the issue.
I originally flashed the EFI using the flash utility within the UEFI, but, I'll re-flash it, anyway, when I get a chance. Not sure how to reproduce this, so I guess I'll just have to watch and see if it pops up.
Kinda unrelated, but when I updated to 2.4, I'd experience a 99 debug code hang (it would add ~5 seconds to boot time). As far as I can tell this would be triggered by trying to choose a boot device by using F11 to open the boot menu. After doing that once, the bug would appear on every boot. Only resetting the EFI would fix it. I'm wondering, given that and this issue, if the flash didn't properly take ...
|
|