Jensen's 2nd serial port

Nils Faerber (
Wed, 13 Nov 1996 12:58:52 +0100 (MET)

Hello all!
My Jensen still seems not to like his second serial port ;(
When I try to access it via minicom or a simple cat foo > /dev/ttyS1 (or
cua1) it dumps the follwing on me:

minicom(260): Ooops 0
pc = [<fffffc00003fb1a0>] ps = 0007
rp = [<fffffc00003fbec4>] sp = fffffc00004c6e20
r0=1 r1=fffffc00004c6f10 r2=fffffffffffffffe r3=73
r16=30 r17=ffffffffffffffff r18=a r19=720072000000008
r20=0 r21=1 r22=fffffc00004158a0 r23=fffffc00003fb928
r24=f r25=10 r26=fffffc00003fbec4 r27=fffffc00003fb180
r28=1 r29=fffffc000042fa30 r30=fffffc00004c6e20
Code: 47ff041f 47ff041f 47ff041f <2c200000> 482000c1 e4200004 40403522
40403401 40003400
Aiee, killing interrupt handler
IO device interrupt, irq = 4
PC = fffffc0000321ad0 PS=0000
Expecting: <1>Unable to handle kernel paging request ay virtual address
00000000 00000000

Those messages repeat endlessly until a complete halt of the system which
can only be resolved by a power cycle.

And these are the cooresponding parts from my
(corresponding to the two PC values):

fffffc0000321440 T sys_settimeofday
fffffc0000321448 t
fffffc00003215c0 T sys_adjtimex
fffffc00003215c8 t
fffffc0000321aa0 T do_bottom_half
fffffc0000321aa8 t
fffffc0000321b80 T get_ioport_list
fffffc0000321b88 t
fffffc0000321c40 t find_gap
fffffc0000321c40 t
fffffc0000321cc8 T request_region
fffffc0000321cd0 t
fffffc00003fb0a0 t
fffffc00003fb0f0 T strrchr
fffffc00003fb0f8 t
fffffc00003fb180 T strnlen
fffffc00003fb180 t
fffffc00003fb1c8 T strspn
fffffc00003fb1c8 t
fffffc00003fb258 T strpbrk
fffffc00003fb258 t
fffffc00003fb2c8 T strtok

The serial driver seems to detect two serial devices correctly:
Oct 22 22:21:10 cruncher kernel: Serial driver version 4.13 with no serial
options enabled
Oct 22 22:21:10 cruncher kernel: tty00 at 0x03f8 (irq = 4) is a 16450
Oct 22 22:21:10 cruncher kernel: tty01 at 0x02f8 (irq = 3) is a 16450
Oct 22 22:21:10 cruncher kernel: lp0 at 0x03bc, (polling)
Or does it detect wrong settings? Should I use different ones?

Any help would be really appreciated! I'd like to have two serial ports

Nils Faerber (Linux Nils)        eMail:
Student of computer science
Unix user group, University of Siegen, Germany

Siegen ... the arctic rain forest!


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