[SUCCESS] Gigabyte Designare Z390 (Thunderbolt 3) + i7-9700K + AMD RX 580

[CaseySJ]

@CaseySJ

That's pretty good ! I have my customised UID and port 7 enabled

View attachment 455182​

Just took a lunch break. Did a lot of cooking because all of us in Silicon Valley are under a shelter-in-place order.

I'm just about to create a custom Thunderbolt DROM... Without a proper DROM, this is what we currently get:


The "after" screenshot coming soon...

 

[Elias64Fr]

Just took a lunch break. Did a lot of cooking because all of us in Silicon Valley are under a shelter-in-place order.

I'm just about to create a custom Thunderbolt DROM... Without a proper DROM, this is what we currently get:

View attachment 455185
The "after" screenshot coming soon...

I finished my customisation ! AND there is a secret sauce .. and oops I have Hachintosh written

 

[jiffyslot]

Hi Jiffyslot, how did you work this out?

Between this Z390 9900KS build and the Z370 8700K, I've rebuilt these systems so many tines that I honestly can't remember. It was probably fixed with Virtual SMC and turning off XMP in the BIOS. FWIW, I am not using the "native NVRAM" mod.

 

[S1lla]

Now only a how to guide left for dummies and everyone can start doing it.

@Elias64Fr @CaseySJ

 

[Elias64Fr]

[SUCCESS] Gigabyte Designare Z390 (Thunderbolt 3) + i7-9700K + AMD RX 580

@CaseySJ Ok, education time for me. So in the EFI we have a disabled SAT0>SATA and in the DSDT.aml I can search for SATA. The questions I have are: Do you pull your system DSDT via whatever method you like (Maciasl I assume) and do a find/replace? If not, did you enable the name change in the...

www.tonymacx86.com

Okay, the procedure for the edit went fine, but the USB stick won't boot via F12. Every time I select it, the screen goes dark for a moment and goes back to the F12 boot-option page.

@jiffyslot @ziggenpuss

Have you try seen if you have HFSPlus.efi driver on USB key and/or enabling Legacy boot on BIOS ? I had similar problem but don't remember how I solve it.

 

[Elias64Fr]

Just took a lunch break. Did a lot of cooking because all of us in Silicon Valley are under a shelter-in-place order.

I'm just about to create a custom Thunderbolt DROM... Without a proper DROM, this is what we currently get:

View attachment 455185
The "after" screenshot coming soon...

Secret sauce is that we don't need all of previous decoding work

1. Just make required modifications of DROM
2. Use a dummy CRC8 and CRC32
3. After reboot, use hackintool (or terminal command) to see ALL of System log (sometimes "Contains" is buggy)
4. Search for "DROM" text
5. If you find a log about DROM error ... It show false CRC8 and then indicates the right CRC8
6. Correct the CRC
7. Reboot
8. Do the same thing with CRC32
9. Replay line 3 and 4 until you don't find anything about DROM

That's all !

UPDATE: Some illustration

 

[CaseySJ]

Secret sauce is that we don't need all of previous decoding work

1. Just make required modifications of DROM
2. Use a dummy CRC8 and CRC32
3. After reboot, use hackintool (or terminal command) to see all of System log
4. Search for "DROM" text
5. If you find a log about DROM error ... It show false CRC8 and then indicates the right CRC8
6. Reboot
7. Do the same thing with CRC32
8. Replay line 3 and 4 until you don't find anything about DROM

That's all !

Currently we have:

• 02 C7 -- TBSwitch7

Does this need to be either:

• 02 B7

or:

• 02 87

Edit: Fixed typo (80 --> 87)

 

[Elias64Fr]

Currently we have:

• 02 C7 -- TBSwitch7

Does this need to be either:

• 02 B7

or:

• 02 08

Port 7 patching data is : 02 C7 to be replaced by 02 87 (I probably made a mistake on post few days ago )
and use fixed 9 bytes data from rMac as we previously found : On our case (iMac19,1) it's 01580001000D000100

 

[Elias64Fr]

Hi

I'm really impressed by Casey, Elias and all of you who work hard to investigate about TBT. Thanks a lot.

Could we imagine to use fashTBT.exe to flash the Thunderbolt ROM?

Hi @yellocab and Thanks !

Someone has tried with onboard Alpine ridge and despite Success flashing reported by tool, no change after boot.

But you can try on Designare and report back ONLY if you have an external programmer by safety in case of failing and bricking your chip.

 

[CaseySJ]

Port 7 patching data is : 02 C7 to be replaced by 02 87 (I probably made a mistake on post few days ago )
and use fixed 9 bytes data from rMac as we previously found : On our case (iMac19,1) it's 01580001000D000100

I'm sending a custom DROM to you by private message. Please check if it works. Port 7 does not yet appear...