pc/io.h		1991/0703		Created.
		1991/0704
		1991/0705
		1991/0706
		1991/0709
		1991/0710
		1991/0730
		1991/0731
		1991/0801
		1991/0806
		1991/0810
		1991/0811
		1991/0904
		1991/0905
		1991/0906
		1991/0910
		1991/0912
		1991/1112
		1991/1127
		1992/0403
		1992/0904		Change Ethervec. Clarify values of Mousevec, Matherr2vec, and Hardvec.
		1992/0922		Add generic ethernet structures.
		1992/0929		Add PCMCIAvec.
		1992/1222		Remove generic ethernet structures.
		1994/0908		Remove Ethervec, add names for unassigned vectors. Add MaxEISA.
		1995/0126		Add EISAconfig.
		1995/0517		Add PCIcfg.
		1995/0519		Add MaxPCI.
		1995/0726		Increase MaxPCI for "mechanism #2".
		1995/0818		Mark vectors for second ATA controller.
		1997/0327		Initial SMP support — new vector names, replace PCIcfg with Pcidev, add PCMmap.
		1997/1011		Increase number of PCI memory regions recorded; record sizes too. Add Pcidev.list and Pcidev.bridge.
		1998/0320		Add VectorNMI, VectorINTR.
		1998/0910		Move LAPIC vectors higher. XXX why? Add generic SCSI definitions.
		1998/1121		Increase Pcidev.mem even more. (HW Bug fix?)
		1999/0301		Split out Pcidev.cc registers. Remove double typedef.
		1999/0622		Add Pcisiz, Pcidev.pcr, Pcidev.ioa, and Pcidev.mema.
		1999/0713		Add SMBus.
		1999/0715		Add SMBus transaction enum and generic function. Add locking.
		1999/0727		Add IrqATA1 (how quickly we forget).
		1999/0819		Add name to Vctl for debugging.
		1999/1007		Add VectorUD — invalid opcode.
		2000/0405		Whitespace edit.
		2000/0506		Add CfgEISA, PciCB* enum, Pcidev.rid, PCI and ISA window macros. Remove SCSI definitions.
		2000/1118		Add PCMslot, PCMconftab, and Cisdat.
		2001/0527		Convert to 9P2000 — NAMELEN to KNAMELEN.
		2001/0619		Remove Cisdat.
		2001/0622		Add Pcidev.rom.