How port sdbus.sys & sdstor.sys 6.3.9600 for WinXP 64-bit?

[reboot12]

@George King

I succesfully use your ported drivers Generic_SD+MMC_6.2.8056.0 for install WinXP 64-bit on eMMC disk on Dell Wyse 3040 Cherry Trail:
https://msfn.org/board/topic/183464-updated-drivers-for-windows-xp-sp3-and-windows-2003-sp2-x32x64-for-modern-hardware/page/204/#findComment-1288105
Now I try the same on eMMC in Dell Wyse 5070 Gemini Lake but I have BSOD 7B:

I edited the files sdbus.sys 6.3.9600.17399 and sdstor.sys 6.3.9600.17031 changing ntoskrnl.exe to ntoskrn8.sys and security_cookie 32 A2 DF 2D 99 2B to 32 A2 DF 2D 99 FF but not help. Instead of BSOD I have a blank aurora wallpaper but the system does not hang.
How properly port drivers?

 

Edited June 16 by reboot12

[George King]

Newer ones than 6.2.8056 are not compatible. Don't exactly remember what was changed, it's way too long from my research. Why you not using ready made drivers? They don't support it? If not, probably same like porting Windows 8.1 USB3.x driver, require too much additional imports and new support structures.

[reboot12]

2 hours ago, George King said:

Why you not using ready made drivers?

Your ready made Generic_SD+MMC_6.2.8056.0 not work on Dell Wyse 5070 Gemini Lake. Maybe it's not a driver problem, but I tested Win8.1 and it installs and runs without any problems on a Dell Wyse 5070 Gemini Lake.

sdbus.sys and sdstor.sys 6.3.9600 require some functions:

https://www.mediafire.com/file/1oi3xz5tya94e9m/org81.zip/file

Edited June 16 by reboot12

[George King]

When it goes to PoFx.... function then it's more like end of journey. They are too complex to easily solve them..

[reboot12]

1 hour ago, George King said:

When it goes to PoFx.... function then it's more like end of journey. They are too complex to easily solve them..

Maybe your ported drivers Generic_SD+MMC_6.2.8056.0 are OK but on Dell Wyse 5070 need also other driver e.g. GPIO to initialize eMMC before ???

I've already asked somewhere (MDL Conversation or github Issue) but you didn't answer - have you tested your 6.2 eMMC drivers with any eMMC disk under XP 32/64-bit ??? I mean exactly the eMMC drive, not the SD card reader + SD card

I've already tried testing eMMC on 3 computers but only on one was I successful:

• Asus Transformer laptop/tablet with UEFI32 - I couldn't boot WinXP 32-bit so I couldn't test the eMMC driver
• Dell Wyse 5070 - WinXP does not detect the eMMC drive (I don't know why)
• Dell Wyse 3040 - your drivers work with eMMC drive under WinXP 64-bit

Edited June 17 by reboot12

[George King]

Possible it fails, it's one first Windows 8.0 betas with this support. And last one which can be ported. Only Generic SD was tested on both XP x86 and x64.

[reboot12]

55 minutes ago, George King said:

Only Generic SD was tested on both XP x86 and x64.

i.e. regular SD cards and not an eMMC drive ?

[UsefulAGKHelper]

On 6/16/2026 at 8:55 AM, reboot12 said:

Your ready made Generic_SD+MMC_6.2.8056.0 not work on Dell Wyse 5070 Gemini Lake. Maybe it's not a driver problem, but I tested Win8.1 and it installs and runs without any problems on a Dell Wyse 5070 Gemini Lake.

sdbus.sys and sdstor.sys 6.3.9600 require some functions:

https://www.mediafire.com/file/1oi3xz5tya94e9m/org81.zip/file

You can try to implement the missing functions in ntoskrn8 source code using AI (not referring to blank stubs but actual working implementations based on public documentation I think).

Edited Saturday at 10:02 PM by UsefulAGKHelper