> > After I type 'mount -t cd9660 /dev/cd1a /cdrom', 
> > I get these messages and fall into debug mode:
> > Kernel: page fault trap,  code=0
> > Stopped at      trm_msgout_abort+0x38:  andb    $0xfe,      0x2f(%eax)
> > db>t
> 
> Ugh, your kernel got panic? Too bad, at least, we should have
> sanity checks.. Would you please post whole trace messages
> including function arguments?
> (I guess they are trm_intr() and trm_reselect() ;-)

Hello,
here they are:
trm_msgout_abort(c0593800,c0593a50,c02b7f20,c059b000) at trm_msgout_abort+0x38
trm_reselect(c0593800,c0594000,cafd8a79,c020ffbd,c0581bc0) at trm_reselect+0x102
trm_intr(c0593800) at trm_intr+0x89
Xintr11() at Xintr11+0x7e
--- interrupt ---
idle(cafc1904,8,cafd0001,c01ee373) at idle+0x1b
bpendtsleep(c36116e8,11,c0247d1a,0,0,c6598400,ffffffff,c0152021) at bpendtsleep
biowait(c36116e8,c0596500,cafd8be0,c01e0ec1,c36116e8,4,cafd8c00,c01f2e62) at biowait+0x34
readdisklabel(b,c01f172c,c0591800,c0598400,c0596500,c0591800,cafd8c20,c01f325c) at readdisklabel+0xee
cdgetdisklabel(c0596500,0,180,c01c8411) at cdgetdisklabel+0x56
cdopen(608,1,6000,cdfc1904,caf3be50) at cdopen+0x1a5
spec_open(cafd8d0c,0,0,cafc1904,caf3be50) at spec_open+0x1ef
VOP_OPEN(caf3be50,1,fffffffe,cafc1904,caf3be50) at VOP_OPEN+0x3b
iso_mountfs(caf3be50,c0653000,cafc1904,cafd8dbc,0) at iso_mountfs+0xe0
cd9660_mount(c0653000,bfbfdaf7,bfbfd8b0,cafd8e84,cafc1904) at cd9660_mount+0x16d
sys_mount(cafc1904,cafd8f80,cafd8f78,c01ea308) at sys_mount+0x525
syscall_plain(1f,1f,1f,1f,bfbfd8a8) at syscall_plain+0xa7