EduBat wrote on 2026-08-13, 22:05:

2) there are a series of registers that configure the SPI device on the chipset to allow access (or not) to certain areas of the BIOS, so HP may have decided to hide some areas after post.

I tried to mention this in the readme. I saw the same on my HP where, out of the 32 megabytes of the dump, the first 22 are almost empty (FF). Also on the Lenovo, with the first 5Mbytes are empty out of 16.

Regarding this point, I have intentionally disabled some of the BIOS features while in DOS, such as Gigabit ethernet port, PXE boot, RAID, camera, microphone (but not Intel HDA soundcard). Will disabling some BIOS features mean that those areas show as "empty" in the BIOS dump?

zyzzle wrote on Yesterday, 23:28:

EduBat wrote on 2026-08-13, 22:05:

2) there are a series of registers that configure the SPI device on the chipset to allow access (or not) to certain areas of the BIOS, so HP may have decided to hide some areas after post.

I tried to mention this in the readme. I saw the same on my HP where, out of the 32 megabytes of the dump, the first 22 are almost empty (FF). Also on the Lenovo, with the first 5Mbytes are empty out of 16.

Regarding this point, I have intentionally disabled some of the BIOS features while in DOS, such as Gigabit ethernet port, PXE boot, RAID, camera, microphone (but not Intel HDA soundcard). Will disabling some BIOS features mean that those areas show as "empty" in the BIOS dump?

That is indeed possible, HP may have done it that way but I cannot say with any degree of certainty.