Questions tagged [bios]
The BIOS software is built into the PC, and is the first code run by a PC when powered on ('boot firmware'). The primary function of the BIOS is to load and start an operating system.
bios
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Setting Endorsement Primary Seed fails
I am trying to set the EPS in an EDK2 UEFI Application. I always get "Device Error".
int main(int ArgC, char *ArgV[])
{
TPMS_AUTH_COMMAND AuthSession;
AuthSession.sessionHandle = ...
- 11
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Alder Lake N - UEFI GPIO Register Defaults/Initialisation
I purchased an obscure NAS only sold to the Chinese domestic market (Zspace Z4Pro) with a view to using another OS on it since it was intel based (i3-N305)
For reasons unknown the power to the drive ...
- 11
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smbios table header invalid?
i have this hardware id spoofer im working on, and the thing is that i get this result running it
Processing SMBIOS header: Type=0, Length=26
Processing SMBIOS header: Type=0, Length=26
Processing ...
2
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1
answer
47
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assembly 8086 space invaders project, int 10h doesnt work
im making a space invaders project to school and im trying to check if the aliens got to the button of the screen. i used the int 10h d (it takes the color of a pixel on the screen) on my code and it ...
- 33
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Why are the upper half and lower half of the CMOS register value the same?
I used RW Everything to access the CMOS register values through Data/Index ports with 70/71 ports. There are 256 addresses in total, 0x00 ~ 0xFF.
I'm wondering why the upper 128 values (0x00~0x7F) are ...
- 213
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Is there a way to detect BIOS or UEFI system I am dealing with under WinPE?
I would like to know is there an option to find out if my Windows 7 or 10 PE is run on UEFI or BIOS system? I checked https://learn.microsoft.com/ru-ru/windows/win32/cimwin32prov/win32-bios and it ...
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Centering Text in Assembly Language Programming
Do you have any idea on how I can center the text or string in Assembly Language Programming?
Here's my source code:
.model small
.stack 100h
.data
;**********************************************
...
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At what point during system boot is BIOS loaded
On a traditional x86 system boot from power on, at what point does the BIOS get loaded?
A CPU will progress from power off to S5 sleep state, through to S0 operational state. Is there a standard stage ...
- 150
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Dell BIOS Updates Script Freezes
I need to be able to update the BIOS on over 5,000 Dell computers when there is a critical BIOS update. I've messed with batch files and Powershell. This is the latest Powershell. When I run it, it ...
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1
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Libreboot build error: ERROR ./build: this command as root is not permitted
I have problem. After ./build roms all command I get ERROR ./build: this command as root is not permitted.
I changed the owner to normal user of the lbmk directory but it didn't help.
I building ...
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UEFI driver doesn't show "Hello World" in EFI Shell on boot
I made this UEFI driver with EDK2. It prints "Hello, World!" and pauses the Shell for 60 seconds. When I load the driver in EFI Shell manually it works perfectly. I then proceeded to pack ...
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Purpose of stack register(s) in holding 0x7c00
I have a problem in understanding the curtain part of the code, how it works and what's behind the operating stack register(s).
; that part i'm referring to
mov ss, ax
mov sp, 0x7c00
I need an ...
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UEFI Event Logs
I am unable to get the event logs in UEFI mode tried in different ways like from BIOS settings of the Intel NUC board and tried using the UEFI application but failed to collect UEFI event logs
also ...
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Loading disk sector into memory (AT&T)
I want to load a sector into a memory address starting at (0xD000). I use index addressing to complete disk load with 0x13 BIOS interrupt. Using 16bit mode, BIOS, AT& Syntax assembly.
I am having ...
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x86 BIOS stage 1 boot code halting after loop from interrupt [closed]
I have some x86 BIOS boot code (16 bit real mode):
org 0x7C00 ; tell compiler where we are located in memory
bits 16 ; tell compiler that ...
