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It typically incorporates several built-in device drivers for SoC peripherals, it has several console choices, including serial ports, ROM emulators, JTAG, etc. Just like in other boot loaders environment, variables are commonly configured in persistent storage to create auto boot options. It also has support for network bootstrap.
Even devices built into the motherboard can behave in this way; their option ROMs can be a part of the motherboard BIOS. An add-in card requires an option ROM if the card is not supported by the motherboard BIOS and the card needs to be initialized or made accessible through BIOS services before the operating system can be loaded (usually this ...
An option ROM for the PC platform (i.e. the IBM PC and derived successor computer systems) is a piece of firmware that resides in ROM on an expansion card (or stored along with the main system BIOS), which gets executed to initialize the device and (optionally) add support for the device to the BIOS.
It contains the system initialization code and all built-in device drivers. It also loads the DOS kernel and optional pre-loadable system components (like for disk compression or security), [1] [2] displays boot menus, processes configuration files (like CONFIG.SYS) and launches the shell (like COMMAND.COM).
CONFIG.SYS is the primary configuration file for the DOS and OS/2 operating systems.It is a special ASCII text file that contains user-accessible setup or configuration directives evaluated by the operating system's DOS BIOS (typically residing in IBMBIO.COM or IO.SYS) during boot.
A blue box device allowed for circumventing these charges by enabling an illicit user, referred to as a "phreaker," to place long-distance calls, without using the network's user facilities, that would be billed to another number or dismissed entirely by the telecom company's billing system as an incomplete call. A number of similar "color ...
In 1996, the tech giant partnered with Bandai to launch the Pippin: a gaming console that also doubled as a multimedia device. But due to high pricing and a lack of compelling games, the console ...
Pictorial menu for a digital camera. A user chooses an option from a menu by using an input device. Some input methods require linear navigation: the user must move a cursor or otherwise pass from one menu item to another until reaching the selection. On a computer terminal, a reverse video bar may serve as the cursor.