[ros-diffs] [sir_richard] 47649: [HAL]: Bus support in the HAL actually creates a further wedge between the different x86 HALs: There are actually two dinstinct implementations. On the ACPI HAL, the system is assumed not to have things like special ISA, MCA, EISA buses, and a PCI driver is used in combination with the ACPI Interface for PCI Bus support. On non-ACPI systems, the legacy "Bus Handler" library is used, and the HAL provides a core set of CMOS, EISA, ISA, MCA and PCI bus handlers, each with their