[Request] Tesco Hudl2 Tablet BIOS with EFI Booting

i’m trying my best to modify this bios.

it looks like it needs to be signed as any mod to it fails to boot.
it opens correctly with intel TXE v1 Sys tools FIT 1.1.5.1162 and identifies as BAYTRAIL tablet correctly. closest TXE i can match it to is family 13 1.0.7.1133 . if i replace the txe with clean it powers up blank lit screen and hangs.
as far as the signing, i’ve scoured as hex for clues and used IDA to look for a bypass to no avail.

the bios is from a tesco hudl2, i’ve got a couple of them and i currently have a board wired up to a programmer.
i see there are previous threads about this bios, but they were never completed.
would like to get these booting up something, i just need to somehow disable secure boot in reality so i can boot any EFI.
don’t know what to do or try next i need help please.

i include the bios dump from working device and a OEM update bios/flasher that might help.

Edit by Fernando: Thread title specified

hudl2bios.bin.zip (5.44 MB)

managed to do it at addresss 00500090 changing 98 03 2B 8C 50 00 4B 00 00 00 A1 59 C0 A5 E4 94 into 98 03 2B 8C 50 40 4B 00 00 00 A1 59 C0 A5 E4 94 Corrupting the platform key and allowing it to boot anything plugged into the usb.

so far

Untitled.png


some downloads included
bios for booting with secure boot bypassed, bios configured for android and booting windows .

android boot secure boot disable hudl2 64bit.zip (1.99 MB)

windows boot secure boot disable hudl2 64bit.zip (2 MB)

some setup_var
(full list in attachment)
Boot Type, 0x79
Dual Boot Type: 0x0
Legacy Boot Type: 0x1 (default)
UEFI Boot Type: 0x2

Quick Boot, 0x6D
Enabled: 0x1 (default)
Disabled: 0x0

Quiet Boot, 0x6E
Enabled: 0x1 (default)
Disabled: 0x0

Power Up In Standby Support, 0xE2
Enabled: 0x1
Disabled: 0x0 (default)

ACPI Selection, 0x60
Acpi1.0B: 0x0
Acpi3.0: 0x1 (default)
Acpi4.0,: 0x2
Acpi5.0,: 0x3

USB Boot, 0x5C
Enabled: 0x0 (default)
Disabled: 0x1

hudl2 ifr varsetupmenu.csv.txt (28.5 KB)