Now I am testing the installation in pure UEFI mode (CSM disabled, Secure Boot also disabled) with the same bios: So booting from the NVMe disk works in Legacy BIOS mode I made a USB stick Win10 64-bit as USB-ISO (MPALL service tool for Phison controller), started installer in Legacy mode and installed without any problems Win10 64-bit in Legacy mode on MBR disk In BIOS CSM enable, AHCI disable - only NVMe disk and USB stick connected I programmed BIOS using the CH341A programmer With UEFITool 0.26.0 open legacy.cap and insert DXE driver UEFI NvmExpressDxe_5.ffs, save to legacy+uefi.cap and Extract Body capsule to no_cap3.bin file With MMTool I insert the legacya808.bin file under CSMCORE as 144d, a808 and save file legacy.cap I cut out of the image.rom firmware Legacy (offset 0-45FF), changed PCI DEV to A808, fixed the 8-bit control sum to 00 and save to file legacya808.bin I modified the BIOS B85M-E-ASUS-3602.CAP of the motherboard B85M-E in this way: P.S Probably the NVME UEFI firmware must be inserted in a different way - as a DXE controller (.ffs file) and under CSMCORE put only the cut out part of Legacy OptionROM without part of UEFI (cut block 0 - 45FF from image.rom file and edit PCIR and 8-bit checksum) ![]() WinXP installer running from USB (GRU4DOS) does not see the NVMe disk (see only USB drive) WinPE7 Live running from UEFI not see disk. Setup is inspecting your computer's hardware configuration… I am trying to boot a MiniXP from Hiren's USB but stops at the message: Under UEFI or pure UEFI does not see the disk. I pulled out the chip of the bios and programmed with the CH341A programmerīIOS only sees Legacy (CSM Enabled) N1-Samsung SSD 970 EVO Plus 250 disk. cap file and unpacked capsule (Extract body) in UEFITool Subsystem 0x000B (EFI boot service driver)ĮFI image offset 0x0034 MMTool I insert the image_A808.rom file in the CSMCORE module as 144d a808 ![]() I built a new ROM (legacy+UEFI) using efirom.exe for my Samsung 970 EVO (144D A808):Įfirom -f 0x144d -i 0xa808 -b legacya808.bin -ec ext.efi -r 0x0000 -pci23 -l 0x000002 -o image_A808.rom I unpacked from image.rom UEFI firmware with UEFIRomExtract.exe I changed PCI DEV A802 to A808 (970 EVO), calculated and fix the 8-bit checksum to 00 and save as legacya808.bin In WinHex I unpacked from image.rom legacy firmware from the beginning of the file to offset 45FF Did you put in the bios3.fd image.rom without modification of PCI VEN/DEV?
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