Configuration space compaction

A computer system comprising an interconnect apparatus for interconnecting at least one host to at least one device and providing a plurality of presentation registers, wherein the presentation registers reside in the interconnect apparatus,

• wherein the presentation registers
• provide a presentation interface for the device to the host, the interconnect apparatus comprising memory for holding the presentation registers and a governor operable to manage the presentation registers in the memory, and
• comprise soft-configurable registers and hard-wired registers,
• wherein the interconnect apparatus enables software to modify the presentation registers to define, control, and access a status of one or more devices, and
• wherein the governor polls presentation layer access requests from one or more remote hosts seeking read or write access and foundation layer resource blocks seeking status updates.

A method of interconnecting at least one host to at least one device via an interconnect apparatus, the method comprising

• maintaining in memory in the interconnect apparatus a plurality of presentation providing a presentation interface for the device to the host and managing the presentation registers in the memory,
• wherein the presentation registers:
• provide a presentation interface for the device to the host, the interconnect apparatus comprising memory for holding presentation registers and a governor operable to manage the presentation registers in the memory, and
• comprise soft-configurable registers and hard-wired registers,
• wherein the interconnect apparatus enables software to modify the presentation registers to define, control, and access a status of one or more devices, and
• wherein the governor polls presentation layer access requests from one or more remote hosts seeking read or write access and foundation layer resource blocks seeking status updates.