interesting bug of new fdc(4) - two /dev/fd0 device files

Rostislav Krasny rosti_bsd at yahoo.com
Fri Sep 24 12:12:28 PDT 2004


I have FreeBSD 5.3-BETA5 and 5.3-BETA4 installed on separate disks of
the same computer. After the installation I added a second floppy drive
(disk B in DOS). See following logs about how both systems work after
that:

dmesg and shell logs of 5.3-BETA5 (two /dev/fd0 device files):

PNP0700: adding dma mask 0x4
PNP0700: adding io range 0x3f2-0x3f5, size=0x4, align=0
PNP0700: adding irq mask 0x40
pnpbios: handle 12 device ID PNP0700 (0007d041)
[snipped]
fdc0: ic_type 90 part_id 80
fdc0: <Enhanced floppy controller> at port 0x3f0-0x3f5 irq 6 drq 2 on
isa0
fdc0: ic_type 90 part_id 80
fdc0: [MPSAFE]
fdc0: [FAST]
fd0: <1440-KB 3.5" drive> on fdc0 drive 0
fd1: <1440-KB 3.5" drive> on fdc0 drive 1

> ls -il /dev/fd[0-9]
73 crw-r-----  1 root  operator    4,  10 Sep 24 20:21 /dev/fd0
73 crw-r-----  1 root  operator    4,  10 Sep 24 20:21 /dev/fd0


dmesg and shell logs of 5.3-BETA4 (no such bug):

PNP0700: adding dma mask 0x4
PNP0700: adding io range 0x3f2-0x3f5, size=0x4, align=0
PNP0700: adding irq mask 0x40
pnpbios: handle 12 device ID PNP0700 (0007d041)
[snipped]
fdc0: <Enhanced floppy controller (i82077, NE72065 or clone)> at port
0x3f7,0x3f
0-0x3f5 irq 6 drq 2 on isa0
fdc0: FIFO enabled, 8 bytes threshold
fd0: <1440-KB 3.5" drive> on fdc0 drive 0
fd1: <1440-KB 3.5" drive> on fdc0 drive 1


> ls -il /dev/fd[0-9]
32 crw-r-----  1 root  operator  242,   0 Sep 24 19:05 /dev/fd0
34 crw-r-----  1 root  operator  242,   1 Sep 24 19:05 /dev/fd1


P.S. having two floppy drives became rare at our days but this is still
possible and correct to be used by anyone.


	
		
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