Patent ID: 7716405

Claim:
A computer system comprising a plurality of computer modules connected to one another in a stack, via a stacked interconnection of the computer modules to one another using stackable connectors including a system bus having bus resources including at least one of interrupts and clocks, wherein a first computer module among the plurality of computer modules includes position configuration means for outputting physical position configuration information useable by other computer modules in the stack for determining a physical stack position of the other computer modules in the stack in relation to the first computer module, and includes bus resource managing means, a second computer module among the plurality of computer modules includes position identifying means for identifying a unique physical stack position of the second computer module in the stack in relation to the first computer module, on a basis of the position configuration information received from the first computer module, and for outputting physical position information in the second computer module indicating the stack position of the second computer module in the stack, and the second computer module further includes resource deciding means to output resource selection information for controlling the second computer module self-selecting the bus resources used by the second computer module based on the physical position information indicating the stack position of the second computer module in the stack, and resource selecting means for selecting the bus resources based on the resource selection information, and for the bus resources managed by the bus resource managing means, the second computer module selects the bus resources according to the physical position of the second computer module itself in the stack, and uses the selected bus resources.