Integration model for instant-on environment
An instant-on environment consists of components residing in a computer boot ROM and/or also on a mass storage device. Main components to the instant-on environment include a loader, EPG1, and EPG2. The loader is a module that is integrated into the computer boot ROM, based on an embedded OS, that functions to load other instant-on environment components. There are various methods of integrating the loader into boot firmware to optimize for different requirements. EPG1 is a first user screen that appears on the computer display within seconds after power-on, and from which the user can choose to launch one of the instant-on environment's applications or launch the primary OS. EPG2 is launched if the user chooses to launch an instant-on environment application. EPG2 is a Linux-based desktop environment that the user enters once he selects an application from EPG1.
1. An instant-on environment for a computer comprising a boot ROM and a mass storage device, wherein the mass storage can be either hard disk or flash memory, said instant-on environment comprising:
a loader that is integrated into said boot ROM, based on an embedded OS, and that functions to load other instant-on environment components;
an EPG1 interface element comprising a first user screen that appears on a computer display within seconds after power-on, and from which a user can choose to launch one of a plurality of instant-on environment applications or launch a primary OS;
an EPG2 interface element that is launched if said user chooses to launch an instant-on environment application, wherein said EPG2 interface element comprises a desktop environment that said user enters once an application is selected from said EPG1 interface element; and
wherein said instant-on environment comprises any or all of said loader, EPG1, and EPG2, and resides in any one or all of said boot ROM and mass storage;
wherein the computer always boots first to said loader and said EPG1, instead of to said primary OS; and
wherein said loader further comprising means for:
switching between real and protected modes;
calling BIOS/UEFI's various software services and APIs; and
further comprising:
data structures in memory, comprising headers, that are integral to a boot process, said headers comprising:
a header which BIOS/UEFI can programmatically find and which provides BIOS/UEFI with the necessary information to successfully run the loader; and
a header that is used for exchanging information between said BIOS/UEFI and said instant-on environment.