System boot method

G - Physics – 06 – F

Patent

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Details

G06F 9/00 (2006.01)

Patent

CA 2528158

A method includes powering up a system with a system control circuitry (SCC) that contains a central processing unit (CPU). The method includes holding the CPU in a reset condition. The method also includes retrieving, over a serial data bus using a serial communications protocol, information about a system memory configuration and a boot program from a first section of a programmable read only memory (PROM). The method also includes retrieving, over a serial data bus using a serial communications protocol, a first portion of the boot program from a second section of the PROM using the information about the system memory configuration and the boot program, writing the first portion of the boot program into a system memory, releasing the CPU from the reset condition, and booting the system using the boot program.

Le procédé de cette invention consiste à mettre sous tension un système pourvu d'un circuit de commande (SCC) qui contient une unité de traitement centrale (CPU). Le procédé consiste à maintenir la CPU à l'état de remise à zéro, et à extraire, sur un bus de donnes série utilisant un protocole de communications série, des informations concernant une configuration de mémoire du système et un programme d'initialisation à partir d'une première section d'une mémoire morte programmable (PROM). Le procédé consiste également à extraire, sur un bus de données série utilisant un protocole de communications série, une première partie du programme d'initialisation à partir d'une seconde section de la mémoire PROM au moyen des informations concernant la configuration de la mémoire système et le programme d'initialisation, écrire la première partie du programme d'initialisation dans une mémoire système, libérer la CPU de l'état de remise à zéro et initialiser le système à l'aide du programme d'initialisation.

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