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2. Ultimate Boot CD - Wikipedia

   en.wikipedia.org/wiki/Ultimate_Boot_CD

   The Ultimate Boot CD contains freeware and open-source diagnostic tools from a variety of sources. Many of these tools were originally designed to boot from a floppy disk drive. The Ultimate Boot CD made it possible to run them on a PC without a floppy drive. [5] UBCD can also run from USB for computers without an optical drive. [5]

3. Power-on self-test - Wikipedia

   en.wikipedia.org/wiki/Power-on_self-test

   A modern PC with a bus rate of around 1 GHz and a 32-bit bus might be 2000x or even 5000x faster, but might have many more gigabytes of memory. With boot times more of a concern now than in the 1980s, the 30- to 60-second memory test adds undesirable delay for a benefit of confidence that is not perceived to be worth that cost by most users.

4. UEFI - Wikipedia

   en.wikipedia.org/wiki/UEFI

   Unlike the legacy PC BIOS, UEFI does not rely on boot sectors, defining instead a boot manager as part of the UEFI specification. When a computer is powered on, the boot manager checks the boot configuration and, based on its settings, then executes the specified OS boot loader or operating system kernel (usually boot loader [ 62 ] ).

5. Option ROM - Wikipedia

   en.wikipedia.org/wiki/Option_ROM

   Prior to the development and ubiquitous adoption of the Plug and Play BIOS standard, an add-on device such as a hard disk controller or a network adapter card (NIC) was generally required to include an option ROM in order to be bootable, as the motherboard BIOS did not include any support for the device and so could not incorporate it into the BIOS's boot protocol.

6. Booting - Wikipedia

   en.wikipedia.org/wiki/Booting

   Examples of first-stage (hardware initialization stage) boot loaders include BIOS, UEFI, coreboot, Libreboot and Das U-Boot. On the IBM PC, the boot loader in the Master Boot Record (MBR) and the Partition Boot Record (PBR) was coded to require at least 32 KB [51] [52] (later expanded to 64 KB [53]) of system memory and only use instructions ...

7. Bootloader - Wikipedia

   en.wikipedia.org/wiki/Bootloader

   The first stage of PC boot loaders (FSBL, first-stage boot loader) located on fixed disks and removable drives must fit into the first 446 bytes of the master boot record in order to leave room for the default 64-byte partition table with four partition entries and the two-byte boot signature, which the BIOS requires for a proper boot loader ...