Implementing universal serial bus support with a minimum of syst

Electrical computers and digital processing systems: support – Digital data processing system initialization or configuration – Loading initialization program

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G06F 924

Patent

active

061287326

ABSTRACT:
A computer system that implements communication support with a minimum amount of main memory. The computer system provides a Basic Input/Output System (BIOS) for execution in Random Access Memory (RAM). Included in the BIOS is the communication initialization and runtime code. Upon initialization, the communication initialization code is executed, configuring and initializing communication devices, including a Universal Serial Bus (USB) device. After the initialization, the runtime communication code is moved to a secure memory, such as System Management Mode (SMM) memory. The runtime communication code is executed in response to an interrupt to the secure memory. If the secure memory is SMM memory, then a SMI will trigger the execution of the communication code. The main memory is not accessed to execute the runtime communication code.

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