pc/devvga.c		1992/0527		Created.
		1992/0528
		1992/0529
		1992/0603
		1992/0604
		1992/0711
		1992/1119
		1992/1121
		1992/1124
		1992/1209
		1992/1215
		1992/1216
		1992/1217
		1993/0102
		1993/0103
		1993/0106
		1993/0108
		1993/0115
		1993/0206
		1993/0226
		1993/0402
		1993/0409
		1993/0915
		1993/1116
		1993/1117
		1993/1217
		1993/1221
		1993/1225
		1993/1229
		1993/1230
		1994/0311
		1994/0317
		1994/0323
		1994/0407
		1994/0409
		1994/0412
		1994/0413
		1994/0414
		1994/0415
		1994/0416
		1994/0421
		1994/0422
		1994/0503
		1994/0506
		1994/0507
		1994/0510
		1994/0520
		1994/0521
		1994/0528
		1994/0603
		1994/0624
		1994/0630
		1994/0702
		1994/0715
		1994/0729
		1994/0803
		1994/0809
		1994/0810
		1994/0812
		1994/0909
		1994/0910
		1994/0930
		1994/1029
		1994/1103
		1994/1117
		1994/1119
		1994/1201
		1995/0108
		1995/0117
		1995/0126
		1995/02021
		1995/0204
		1995/0206
		1995/0207
		1995/0228
		1995/0406
		1995/0407
		1995/0508
		1995/0624
		1995/0726
		1995/0812
		1995/0815
		1995/1227
		1996/0216
		1996/0315
		1996/0418
		1997/0327
		1997/0401
		1997/0408
		1997/0531
		1997/0611
		1997/0613
		1997/1011
		1997/1101
		1998/0319		Change dev read and write to use vlong offset.
		1999/0119
		1999/0714		Only allow access to ports that have not been ioalloced.
		1999/1005
		1999/1006
		1999/1009
		2000/0308
		2000/0326
		2000/0330
		2000/0522
		2000/0530
		2000/0607
		2001/0426
		2001/0427
		2001/0428
		2001/0430
		2001/0501
		2001/0503
		2001/0527
		2001/0822
		2001/1005
		2001/1015
		2001/1117
		2001/1120
		2001/1204
		2002/0109		Add devshutdown.
		2002/0430
		2002/1201
		2002/1205