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Latest comment: 1 year ago by Guy Harris in topic Shouldn't this paragraph be adjusted
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UEFI

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Latest comment: 1 year ago 6 comments3 people in discussion

See UEFI. It says A common misconception is that UEFI is a replacement for BIOS and explains that UEFI-based motherboards come with BIOS ROMs. I saw elsewhere a page in the Intel website stating that a UEFI is an interface between the operating system and the system firmware and I am nearly certain that firmware is the BIOS, but I closed that page. Sam Tomato (talk) 02:47, 4 February 2022 (UTC) Reply

Okay, see Unified Extensible Firmware Interface. It says the UEFI defines an interface between an operating system and platform firmware. There are many possible references saying that firmware is BIOS. Sam Tomato (talk) 02:51, 4 February 2022 (UTC) Reply

The Alternatives and successors section says that Intel announced that it would remove legacy BIOS support without any authority for that. I have provided an authority from them indicating that systems still have BIOSs. Sam Tomato (talk) 03:34, 4 February 2022 (UTC) Reply

That osdev.org article uses dodgy terminoloy. See Barlop's answer here that mentions that article. https://superuser.com/questions/1450261/does-uefi-run-on-top-of-bios Preceding unsigned comment added by 86.1.49.43 (talk) 03:57, 21 September 2023 (UTC) Reply

I've added a reference for Intel's announcement that they will end legacy BIOS support by 2020. Guy Harris (talk) 06:48, 6 September 2024 (UTC) Reply
It says the UEFI defines an interface between an operating system and platform firmware In that context, "the UEFI" doesn't refer to the UEFI firmware installed on the machine, it refers to the interface (programming interface, etc.) between the software using platform firmware services and the platform firmware. There are several implementations of UEFI firmware, just as there are several implementations of BIOS firmware.
There are many possible references saying that firmware is BIOS. Any reference that says that firmware, in the general sense, or even in the boot-firmware sense, is BIOS, in the PC-specific sense, is wrong. Plenty of machines have boot firmware that isn't compatible with a BIOS; EFI was originally developed for Itanium-based systems, for example, and both later PowerPC-based Macs and later SPARC machines from Sun used Open Firmware. Guy Harris (talk) 07:08, 6 September 2024 (UTC) Reply

Question!

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Latest comment: 3 years ago 3 comments2 people in discussion

What exactly happens if your computer gets unplugged during a BIOS update and does that problem affect laptops?  TheMaggster (talk) 05:23, 24 July 2023 (UTC) Reply

it will corruptBold 105.112.189.112 (talk) 16:44, 5 August 2023 (UTC) Reply
Thanks for the answer. TheMaggster (talk) 16:45, 6 August 2023 (UTC) Reply

Shouldn't this paragraph be adjusted

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Latest comment: 1 year ago 3 comments2 people in discussion

It says "The BIOS firmware comes pre-installed on an IBM PC or IBM PC compatible's system board and exists in some UEFI-based systems to maintain compatibility with operating systems that do not support UEFI native operation."

It could be adjusted to note past tense, BIOS CAME pre-installed, rather than comes pre-installed. And the description about the BIOS existing in some UEFI should be said far more accurately and clearly. The paragraph below has that adjustment.

The BIOS is firmware that came pre-installed an IBM PC or IBM PC compatible's system board. Nowadays systems use UEFI rather than a BIOS. UEFI is the modern type of firmware that has replaced BIOS. Many UEFI-based systems have a "Legacy mode", also known as CSM Mode, which allows the UEFI to emulate a BIOS if the user requires it e.g. to run an older OS. 86.1.49.43 (talk) 03:51, 21 September 2023 (UTC) Reply

Wouldn't that be much better? — Preceding unsigned comment added by 86.1.49.43 (talk) 03:52, 21 September 2023 (UTC) Reply

I've updated the only mention of pre-installation to say "On a computer using BIOS firmware, the firmware comes pre-installed on the computer's motherboard.", in case anybody thinks all computers, or even all IBM-compatible PCs, have BIOS firmware. Guy Harris (talk) 23:13, 5 August 2025 (UTC) Reply

BIOS reverse engineering

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Latest comment: 2 years ago 2 comments1 person in discussion

"The BIOS originally proprietary to the IBM PC has been reverse engineered by some companies (such as Phoenix Technologies) looking to create compatible systems."

There is a complete assembly listing of the original IBM PC/AT BIOS in IBM's PC/AT Technical Reference Manual. This means that no reverse engineering was required. 106.69.154.248 (talk) 23:02, 30 January 2024 (UTC) Reply

1502494_PC_AT_Technical_Reference_Mar84.pdf Preceding unsigned comment added by 106.69.154.248 (talk) 17:06, 21 February 2024 (UTC) Reply

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