Booting a computer system at start-up by transferring a first part of instructions using a second bus and transferring a second part of instructions using a first bus where the second bus is configured to transfer instructions at a faster rate than the first bus

A method of operating a computing device having a computing unit having a working memory and a processing unit, a boot memory having control instructions for operating the computing device to be transferred to the computing unit at start-up of the computing device, and a boot control unit connected to the computing unit by at least a first bus and a second bus and to the boot memory by a third interface, the method comprising:

• retrieving the control instructions from the boot memory by the boot control unit;
• transferring a first part of the control instructions configured to initialize the second bus via the first bus to the computing unit, where the second bus is configured to transfer data at a faster rate than the first bus;
• and
• transferring a second part of the control instructions via the second bus to the computing unit.

A computing device comprising:

• a computing unit having a working memory, a processing unit and a system controller hub connected to the memory and the processing unit;
• a boot memory having control instructions for operating the computing device to be transferred to the computing unit at start-up of the computing device;
• and
• a boot control unit connected to the system controller hub of the computing unit by at least a first and a second bus and connected to the boot memory by a third bus, the boot control unit configured to transfer a first part of the control instructions configured to initialize the second bus from the boot memory via the first bus to the computing unit and to transfer a second part of the control instructions from the boot memory via the second bus to the computing unit, the second bus being configured to transfer data at a faster rate than the first bus.