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Top Forums UNIX for Dummies Questions & Answers Problem with FreeBSD 8.3. BIOS affected Post 302844689 by bakunin on Monday 19th of August 2013 08:31:57 PM
Old 08-19-2013
Quote:
Originally Posted by wisecracker
This is nonsense.
Ahem... I hate to say it, but being too sure is often the hallmark of limited knowledge.

Quote:
Originally Posted by wisecracker
The BIOS is a _ROM_! As it is technically read only and used only as a simple HAL then no amount of GParted code will alter it. The BIOS parameters can be corrupted but a _reset_ to defaults will get it up and running again...
Yes and no. The BIOS code itself may be a ROM (EEPROM, to be precise, otherwise BIOS updates would not be possible), but vital information is stored in NVRAM - this is why there is a battery mounted on the mainboard, you know.

In fact it is possible to damage systems by booting into Linux. The article describes this only for Samsung Notebooks, but the principle could apply generally. AFAIK the problem has been fixed already, but the point is to prove that it is indeed possible to damage (=render unusable) [sufficiently idiotic] hardware by software.

I hope this helps.

bakunin
 

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PNPBIOS(4)                                               BSD/i386 Kernel Interfaces Manual                                              PNPBIOS(4)

NAME
pnpbios -- support for embedded devices on the motherboard DESCRIPTION
The pnpbios driver enumerates embedded ISA devices on the motherboard whose BIOS supports ``Plug and Play BIOS Specification''. It assigns ISA bus resources (interrupt line, DMA channel, I/O ports, and memory region) to each device and activates it. If it cannot assign necessary resources to a device without causing conflict with other devices in the system, the device will not be acti- vated and will be unavailable to programs. CAVEATS
There is no explicit way to disable individual embedded devices. The pnpbios driver will find all devices reported by the ``Plug and Play (PnP)'' BIOS and try to activate them all. There is no way to explicitly assign particular resource to a device. The resource assignment is fully automatic and there is no provision for manual override. SEE ALSO
pnp(4) STANDARDS
Compaq, Phenix, and Intel, Plug and Play BIOS Specification Version 1.0A, May 5, 1994. Compaq, Phenix, and Intel, Plug and Play BIOS CLARIFICATION Paper for Plug and Play BIOS Specification Version 1.0A, October 6, 1994. HISTORY
The pnpbios driver first appeared in FreeBSD 4.0. AUTHORS
The pnpbios driver was written by Mike Smith. BSD September 20, 2001 BSD
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