Damnation

@UsefulAGKHelper Best to start over again with a fresh, unmodified source code tree and reapply the patches over again then.

@modnar I've heard that the SP2 version of fltmgr.sys apparently still works just fine.

@sk9392 You can comment out the KeBugCheckEx(0xDEADBEEFL parts of the ntoskrnl extender code to get rid of the DEADBEEF BSOD's.

@Dietmar Heres how you might be able to use AI to help you reverse engineer. You'll need 3 tools. pdbripper - https://github.com/horsicq/PDBRipper/releases/tag/2.03 relyze disassembler - https://www.relyze.com/download.html I use relyze because I've found that neither Ghidra nor IDA pro will let me just copy the assembly code of a single function into a text filr or the clipboard. Lastly, Perplexity AI - https://www.perplexity.ai/ --- OK, lets pick a sizable function from the Netwtn04.sys file using the PDB symbols we have, lets go with oscWfdeSetPreferredOperatingChannel. Using relyze, oscWfdeSetPreferredOperatingChannel is defined as this. int32_t __stdcall oscWfdeSetPreferredOperatingChannel( struct _MINIPORT_CONTEXT * pMpContext, struct _OID_EVENT_DATA * pOid ). We will need to get the struct definitions for MINIPORT_CONTEXT and OID_EVENT_DATA for perplexity AI to use or it'll bul***** its way through with hallucinations, so this is what pdbripper is for. Using pdbripper we can get this for struct definitions - struct _MINIPORT_CONTEXT { void * hMiniportAdapterHandle; void * hWrapperConfigContext; void * hNdisMiniportDmaHandle; struct _FLOW_PROCESSOR * pHmacFlowProcessor; struct _FLOW_PROCESSOR * pMmacFlowProcessor; struct _JOB_SCHEDULER_DATA * pJobScheduler; long numWorkitemsRunningWithoutJobSched; void * pOsc; struct _ALON_CONTEXT * pAlonContext; struct _MLME_SUBSYSTEM * pMlmeSubSystem; struct _APP_EXT_SUBSYSTEM * pAppExtSubSystem; struct _NDIS_MINIPORT_ADAPTER_NATIVE_802_11_ATTRIBUTES * pNativeAttributes; void * pUmacContext; struct _DP_ENGINE_SUBSYSTEM * pDpEngineSubsystem; struct _NDIS_MINIPORT_INIT_PARAMETERS * pMiniportInitParameters; long version; long productVersion; enum _MINIPORT_STATE uNdisMiniportState; struct _SpinlockR NdisMiniportStateLock; struct _SpinlockR NdisMiniportSendPacketLock; struct _SpinlockR contextLock; unsigned char bIsInMPInitialize; long bMiniportInitiatedHandshake; struct _MINIPORT_RESET_CONTEXT miniportReset; struct _DOT11_MIB_CONTEXT dot11Mib; struct _MIB_TABLE * pMib; struct _DATA_PATH_CONTEXT * pDataPathContext; void * pDeviceContext; enum _DOT11_CIPHER_ALGORITHM currentCipherAlg; union _LARGE_INTEGER lastOsScanTime; struct _MEMORY_MANAGER memoryManager; class CheckForHang * pCheckForHang; int doesUmacRunInHost; struct _XVT_CONTEXT * pXvtContext; int bXvtProxyModeEnabled; struct _NDIS_EVENT NdisMiniportInitializationCompleteSyncEvent; int isWdi; int bWdiOffloadMode; int bRestartPending; int bMacAddressRandomizationEnabled; }; struct _OID_EVENT_DATA { unsigned long oid; void * pInfoBuffer; unsigned long infoBufferLen; unsigned long methodOutputBufferLen; unsigned long * pBytesUsed; unsigned long * pMethodBytesWritten; unsigned long * pBytesNeeded; unsigned short opCode; unsigned long portNumber; struct _NDIS_OID_REQUEST * pNdisOidRequest; }; Then, in relyze we right click inside the oscWfdeSetPreferredOperatingChannel disassembly window and select Export -> To Clipboard (Function). We now write a prompt for perplexity AI. --- Using the following struct definitions - struct _MINIPORT_CONTEXT { void * hMiniportAdapterHandle; void * hWrapperConfigContext; void * hNdisMiniportDmaHandle; struct _FLOW_PROCESSOR * pHmacFlowProcessor; struct _FLOW_PROCESSOR * pMmacFlowProcessor; struct _JOB_SCHEDULER_DATA * pJobScheduler; long numWorkitemsRunningWithoutJobSched; void * pOsc; struct _ALON_CONTEXT * pAlonContext; struct _MLME_SUBSYSTEM * pMlmeSubSystem; struct _APP_EXT_SUBSYSTEM * pAppExtSubSystem; struct _NDIS_MINIPORT_ADAPTER_NATIVE_802_11_ATTRIBUTES * pNativeAttributes; void * pUmacContext; struct _DP_ENGINE_SUBSYSTEM * pDpEngineSubsystem; struct _NDIS_MINIPORT_INIT_PARAMETERS * pMiniportInitParameters; long version; long productVersion; enum _MINIPORT_STATE uNdisMiniportState; struct _SpinlockR NdisMiniportStateLock; struct _SpinlockR NdisMiniportSendPacketLock; struct _SpinlockR contextLock; unsigned char bIsInMPInitialize; long bMiniportInitiatedHandshake; struct _MINIPORT_RESET_CONTEXT miniportReset; struct _DOT11_MIB_CONTEXT dot11Mib; struct _MIB_TABLE * pMib; struct _DATA_PATH_CONTEXT * pDataPathContext; void * pDeviceContext; enum _DOT11_CIPHER_ALGORITHM currentCipherAlg; union _LARGE_INTEGER lastOsScanTime; struct _MEMORY_MANAGER memoryManager; class CheckForHang * pCheckForHang; int doesUmacRunInHost; struct _XVT_CONTEXT * pXvtContext; int bXvtProxyModeEnabled; struct _NDIS_EVENT NdisMiniportInitializationCompleteSyncEvent; int isWdi; int bWdiOffloadMode; int bRestartPending; int bMacAddressRandomizationEnabled; }; struct _OID_EVENT_DATA { unsigned long oid; void * pInfoBuffer; unsigned long infoBufferLen; unsigned long methodOutputBufferLen; unsigned long * pBytesUsed; unsigned long * pMethodBytesWritten; unsigned long * pBytesNeeded; unsigned short opCode; unsigned long portNumber; struct _NDIS_OID_REQUEST * pNdisOidRequest; }; Convert the following x86 assembly into human readable C code - int32_t __stdcall oscWfdeSetPreferredOperatingChannel( struct _MINIPORT_CONTEXT * pMpContext, struct _OID_EVENT_DATA * pOid ) { push ebp mov ebp, esp push edi mov edi, dword ptr [pMpContext] test edi, edi jnz code_0x4235 code_0x422B: mov eax, 0xE0020001 pop edi pop ebp ret 0x8 code_0x4235: push ebx push esi mov esi, dword ptr [pOid] mov ebx, dword ptr [esi+0x4] test ebx, ebx jnz code_0x424D code_0x4241: pop esi pop ebx mov eax, 0xE0020001 pop edi pop ebp ret 0x8 code_0x424D: movzx eax, word ptr [esi+0x1C] mov ecx, 0x5 cmp cx, ax jz code_0x4271 code_0x425B: mov ecx, 0x2 cmp cx, ax jz code_0x4271 code_0x4265: pop esi pop ebx mov eax, 0xC0000001 pop edi pop ebp ret 0x8 code_0x4271: push 0x0 push 0x8 push 0xFF10060B push esi call OidEventHandlerPrologCommon; int32_t __stdcall( struct _OID_EVENT_DATA * _pOid, unsigned long _oidExpected, unsigned long _inputBuffLenExpected, unsigned long _outputBuffLenExpected ) test eax, eax jnz code_0x42E3 code_0x4284: push ebx push edi call vifMgrGetContext; inline struct _VIF_MGR_CONTEXT * __stdcall( struct _MINIPORT_CONTEXT * pMpCotnext ) push eax call vifMgrChSelSetPreferredOperatingChannel; int32_t __stdcall( struct _VIF_MGR_CONTEXT * pVifMgrContext, struct _WFDE_SET_PREFERRED_OPERATING_CHANNEL * pOpChannelParams ) mov edi, eax test edi, edi jz code_0x42D6 code_0x4297: mov ecx, dword ptr [WPP_GLOBAL_Control] cmp ecx, va_ptr WPP_GLOBAL_Control jz code_0x42D6 code_0x42A5: test byte ptr [ecx+0x530], 0x1 jz code_0x42D6 code_0x42AE: cmp byte ptr [ecx+0x52D], 0x2 jb code_0x42D6 code_0x42B7: mov eax, dword ptr [ecx+0x524] push va_ptr string_oscWfdeSet; "oscWfdeSetPreferredOperatingChannel" push va_ptr WPP_f50d96c3adb583bcc2c3f6b942324e0c_Traceguids push 0x3B push eax mov eax, dword ptr [ecx+0x520] push eax call WPP_SF_s; void __stdcall( uint64_t Logger, uint16_t id, struct _GUID * TraceGuid, char * _a1 ) code_0x42D6: push edi push 0x0 push 0x8 push esi call OidEventHandlerEpilog; void __stdcall( struct _OID_EVENT_DATA * pOid, unsigned long bytesRead, unsigned long bytesWritten, int32_t rc ) mov eax, edi code_0x42E3: pop esi pop ebx pop edi pop ebp ret 0x8 } --- Perplexity AI gave me this answer. int32_t __stdcall oscWfdeSetPreferredOperatingChannel( struct _MINIPORT_CONTEXT *pMpContext, struct _OID_EVENT_DATA *pOid) { int32_t status; struct _VIF_MGR_CONTEXT *vifCtx; struct _WFDE_SET_PREFERRED_OPERATING_CHANNEL *params; // Validate inputs if (pMpContext == NULL) return 0xE0020001; if (pOid == NULL || pOid->pInfoBuffer == NULL) return 0xE0020001; // Validate opcode (must be 2 or 5) if (pOid->opCode != 2 && pOid->opCode != 5) return 0xC0000001; // Validate OID + buffer lengths status = OidEventHandlerPrologCommon( pOid, 0xFF10060B, 8, 0 ); if (status != 0) return status; // Extract input buffer params = (struct _WFDE_SET_PREFERRED_OPERATING_CHANNEL *)pOid->pInfoBuffer; // Get VIF manager context and set preferred channel vifCtx = vifMgrGetContext(pMpContext); status = vifMgrChSelSetPreferredOperatingChannel(vifCtx, params); // Logging (WPP) if (status != 0) { if (WPP_GLOBAL_Control != NULL && (WPP_GLOBAL_Control->Flags[0x530] & 0x1) && WPP_GLOBAL_Control->Level >= 2) { WPP_SF_s( WPP_GLOBAL_Control->Logger, 0x3B, &WPP_f50d96c3adb583bcc2c3f6b942324e0c_Traceguids, "oscWfdeSetPreferredOperatingChannel" ); } } // Complete OID handling OidEventHandlerEpilog( pOid, 0, // bytesRead 8, // bytesWritten status ); return status; } https://www.perplexity.ai/search/using-the-following-struct-def-iH1rN.zcSMaVPiFOgI5RlA @Dietmar Do you find this helpful?

@Dietmar here is the intel wifi driver with private symbols. https://buzzheavier.com/qra6oddo79o8 I've basically got a whole windows 10 beta build with private symbols for everything in the OS as far as I can tell. I'll PM you with a link to it, you'll probably find it useful for debugging. edit: I couldn't PM you so I sent you an email.

@Dietmar I do have private symbols for an Intel(R) Dual Band Wireless-AC 7265 driver, are you interested?

I can get an AI to pretty reliably convert assembly back into C code if I have the proper symbols.

@Dietmar Here are some private PDB symbols of Intel and Realtek LAN drivers, in case it might help you with future bugfixing. https://buzzheavier.com/i56b89uu20qa I have more, so if you're looking for anything in particular send me a Device ID and I'll check if I've got something for it.

@reboot12 https://www.upload.ee/files/19163520/KDNET-master-x64-16MAR2026.7z.html

@Dietmar I don't have XP x64 installed. I just wanted to get it compiling for you.

@Dietmar @reboot12 I successfully build an x64 kdstub.dll Though in kdstub.c there is a warning I disabled #pragma warning (disable : 4717) // kdstub.c(188) : warning C4717: '_KdInitializeLibrary' : recursive on all control paths, function will cause runtime stack overflow I wasn't sure how to resolve that. https://buzzheavier.com/risw492dkhzy

@Dietmar regarding reworking Mov Ax DEAD's KDNET to compile for x64, do you think the following would work? replacing __declspec(naked) void KdShutdownController () { __asm jmp dword ptr [KdShutdownController_tramp]; } with __declspec(noinline) void KdShutdownController(void) { KdShutdownController_tramp(); // tail call candidate } and doing this for all the functions that use x86 inline assembly?

@Dietmar I thought I'd have another go at trying to get Windows 7 ndis.sys to work on XP, now trying using AI to help reverse engineer assembly into C. This time round I get a 7F 0.0.0.0 Divide by Zero BSOD. If you have time, can you try and find where it's happening in ntoskrn8.sys? https://buzzheavier.com/cy852zg5l602

DisINTx should be disabled in XP I think since XP isn't using MSI? The disintx (Disable Interrupt) bit, located in the PCI Command Register (offset 0x04, bit 10), is used to mask legacy INTx interrupts for PCI/PCIe devices. When set to 1, this bit prevents the device from asserting interrupt lines, which is crucial for managing IRQ sharing and configuring MSI/MSI-X.

Oh, OK.

@Dietmar Isn't it just a normal LGA1151 socket on that board? Just use any LGA1151 cooler.

@Dietmar On the topic of NICs, I have an industrial ETX carrier board that has a late revision Realtek 8168 chipset (Rev. 15) that I would like to try and get working in Windows 98 SE. It works just fine in XP with Realtek's XP driver but transporting that same driver over to 98 causes a BSOD in NDIS.VXD, and the 98 driver on Realtek's website just gives a yellow exclamation mark if I install it, so I'd like to try and make a win98 driver following your example. Can you link me to the hardware documentation you've been using to make this these drivers?

@Dietmar I added an RTC8125.rc resources file to your project just for the aesthetics, it's nicer with one. https://buzzheavier.com/ziftf00d8rg9 Also, when I build this with the windows 7 DDK - I got an inconsistent DLL linking error in NdisMInitializeScatterGatherDma and had to use #pragma warning(disable:4273) to get it to compile. Is that normal?

@reboot12 Can you send me the links in your symbols_links.txt? I don't have them all.

@Dietmar Nice work!

@reboot12 Does disabling and reenabling the NIC get it working again?

@Dietmar Sorry for my late reply. My NIC deviceID is PCI\VEN_10EC&DEV_8125&CC_0200 I'm using an ASRock B550 Steel Legend.

@Dietmar Do you think you'd be able to make a similar driver for realtek 2.5gb NICs at some point in the future? I don't have any hardware with intel i219 NICs.

@George King Is XP2ESD still being worked on? or not anymore?

@UsefulAGKHelper Setup an XP VM and run it from in there, that's how I do it.