[Guide] How to flash a modded AMI UEFI BIOS

BIOS/UEFI Modding BIOS Modding Guides and Problems
1244

I have a basic FPT flashing question. I’m 99% sure I’ve got a solid modded bios that’s ready to flash. My Intel ME version is 12, so I’ll be using the Flash Programming Tool under CSME System Tools v12 r38. My Dell has a physical service mode pin that will allow for an FPT flash.

Is it problematic or potentially problematic to simply flash over the current bios with the command FPTW64.exe -f bios.bin (and this assumes the modded bios is named bios.bin)?

Or, is it safer or required to erase the bios first, and then flash?

I’m getting this idea from this post:

  1. Type FPTW64 -ERASE and press enter.

  2. Type FPTW64 -REWRITE -F moddedbios.rom (for example) and press enter.

turn off your pc and reboot.

When I mis-flashed my bios, there’s no question that the replacement bios was broken. But I did simply overwrite with FPTW64.exe -f bios.bin, and am now considering proper FPT flashing to finish this off. Thanks

1245

-ERASE Erase the contents of flash.

-REWRITE Rewrite the SPI with file data even if flash is identical.

fpt -h will get you the CMD switches

The rewrite switch usually is not needed but its useful to write if the system has the same bios version and ensure the block override, when for ex.: some tiny adjustments were made in previous flashed mod file and tool still complains about it, being identical data.