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[Q]: Trap number information and troubleshooting diagnostics
[A]: Ivan Grigoriev (2:5020/333)
_Trap_ 0000 (00) - Divide by Zero Error
A trap 0000 occurs when a program attempts to divide a number by zero or the
result of the operation is too large for the
overflow register to handle it. [SYS1930]
_Trap_ 0001 (01) - Debug Exception
A trap 0001 is caused when a program enables the single step interrupt
when not being run by a debugger. [SYS1931]
_Trap_ 0002 (02) - Non-Maskable Interrupt (NMI).
A trap 0002 is caused when an Non-Maskable Interrupt (NMI) is generated by
the system for a catastrophic error. Four
possible causes of this are:
110 error - Planar parity error: memory or system board
111 error - I/O parity error, memory adapter or memory
112 error - Watchdog time-out: any adapter, system board
113 error - DMA arbitration time-out: any adapter, system board
_Trap_ 0003 (03) - Debug Breakpoint.
A trap 0003 is caused when the program called an INT3 without being run by
debug. This happened because debugging code
was left in the program either accidentally or by design. [SYS1933]
_Trap_ 0004 (04) - Overflow Detected.
A trap 0004 is caused when a program started an INTO instruction without
registering an overflow exception handler. [SYS1934]
_Trap_ 0005 (05) - Bound Range Exceeded.
A trap 0005 is caused when a program started a BOUND instruction without
registering a bound exception handler. [SYS1935]
_Trap_ 0006 (06) - Invalid Opcode Instruction.
A trap 0006 is caused when a program started an invalid instruction
without registering an invalid opcode exception handler.
[SYS1936]
_Trap_ 0007 (07) - Coprocessor not Available.
A trap 0007 is caused when a program called for a numeric coprocessor
instruction without a coprocessor in the system and
without registering a processor extension not available exception handler.
[SYS1937]
_Trap_ 0008 (08) - Double Fault
A trap 0008 is caused when the processor detects an exception while
processing another exception. [SYS1938]
_Trap_ 0009 (09) - Coprocessor Segment Overrun
A trap 0009 is caused when a program runs a numeric coprocessor
instruction that tries to read or write past the end of the
storage segment. [SYS1939]
_Trap_ 000A (10) - Invalid Task State Segment
A trap 000A is caused when a program attempts a task switch to an invalid
task switch segment. [SYS1940]
_Trap_ 000B (11) - Segment not Available
A trap 000B is caused when a program attempts to reference a memory
segment that isn't present. [SYS1941]
_Trap_ 000C (12) - Stack Fault
A trap 000C is caused when a program attempts to push more data onto the
stack than it can hold, call too many subroutines, take
more data off the stack than was pushed onto it or return more subroutines than
were called. [SYS1942]
_Trap_ 000D (13) - General Protection Fault
A trap 000D is caused (but not limited to) when a program references
storage outside the limit of the memory segment,
references a storage segment that is restricted to privileged code, references
storage with a selector value of zero, writing read-only
memory or code segment, reading from an execute-only code segment or loading an
invalid value into a selector register. [SYS1943]
NOTE: All protection violations which do not cause another exception cause a
TRAP 000D.
_Trap_ 000E (14) - Page Fault
A trap 000E is caused when a page being referenced is not present in
memory, the procedure referencing the page doesn't
have enough privilege to access the page or the address range was allocated but
no storage is committed.
_Trap_ 000F (15) - Reserved by Intel
A trap 000F is reserved by Intel, It's not for our use.
_Trap_ 0010 (16) - Coprocessor Error
A trap 0010 is caused when the processor detects an error from the
coprocessor, either by hardware or software.
For Trap 0000 errors, try the following:
o If using a CSD level prior to XR06055, upgrade the operating system. With
earlier CSD levles, Trap 0002 errors
were sometimes incorrectly reported as Trap 0000 errors.
o Copy the default CONFIG.SYS from \OS2\INSTALL to the root directory. Trap
0000 errors can be caused by an
exception in a device driver. If the Trap 0000 does not occur with the
default CONFIG.SYS, check the original
CONFIG.SYS for the offending device driver.
For trap 0002 errors, try the following:
o See Retain Tip #H083121, Section C for several known causes of Trap 0002
Errors.
o Check hardware, especially memory. Trap 0002 errors are caused almost
exclusively by hardware problems. The
most common type of Trap 0002 is caused by a failing memory module. (This
is the equivalent of a memory parity
error under DOS.)
o If there is an enhanced 80386 memory expansion adapter installed, ensure the
resistors are installed diagonally on
the adapter. (See Retain Tip #H037481 for additional details.)
o If error is received after installing new memory, ensure the SIMMs are
supported on the system. (Both speed and
manufacturer)
o Ensure that faster memory is installed before slower memory. Run advanced
diagnostics to ensure memory has not
failed. If bad SIMMs are detected, replace. If none are, suspect the
system board and have it inspected.
o On 8570-A61, -A21, -B61, -B21 or 8580-A21, -A31, -A16, refer to ECA 051 and
ECA 059 respectively.
o If the system has a non-IBM EGA adapter card, disable the adapter's
auto-switch function.
o If system is a MCA machine, check to see if there are any applicable ECA's.
For trap 0003 errors, try the following:
o Check hardware. (The failing hardware is usually not memory modules.)
o If using OS/2 2.1, use IBMINT13.I13 instead of IBM1S506.ADD. (Change BASEDEV
statement in CONFIG.SYS to
do this.)
For trap 0006 errors, try the following:
o See Retain Tip #H083121, Section C for several known causes of Trap 0006
Errors.
o Check hardware. (The failing hardware is usually not memory modules.)
o Disable cache.
o Most Trap 0006 errors during installation can be corrected by disabling
cache, ROM shadowing, turbo, etc.
o Ensure the installed memory is the correct speed for the system board.
o If the error occurs every time within the same application and CHKDSK
doesn't correct the problem, contact the
software developer for further assistance.
For trap 0007 errors, try the following:
o See Retain Tip #H083121, Section C for several known causes of Trap 0007
Errors.
o Obtain a copy of the program that doesn't require a coprocessor or install a
coprocessor if possible.
o Ensure the installed memory is the correct speed for the system board.
o If the error occurs every time within the same application and CHKDSK
doesn't correct the problem, contact the
software developer for further assistance.
For trap 0008 errors, try the following:
o See Retain Tip #H083121, Section C for several known causes of Trap 0008
Errors.
o Ensure the installed memory is the correct speed for the system board.
o If during installation, REM out BASEDEV=IBM1S506.ADD in the CONFIG.SYS on
the installation diskette.
o Definitely check RETAIN for similar errors. A large number of Trap 0008
errors are caused by bugs in OS/2 or
other components, such as NTS/2, Netware Requester for OS/2, CM/2, etc.
o Check hardware. Trap 0008 errors can sometimes be caused by hardware
problems.
o Check for IRQ conflicts.
o If the error occurs every time within the same application and CHKDSK
doesn't correct the problem, contact the
software developer for further assistance.
For trap 000C errors, try the following:
o See Retain Tip #H083121, Section C for several known causes of Trap 000C
Errors.
o Check memory, run advanced diagnostics on adapter cards, and replace as
needed. Trap 000C errors can be
caused by the same types of hardware problems that produce Trap 0002 errors.
o Ensure the installed memory is the correct speed for the system board.
o If the error occurs every time within the same application and CHKDSK
doesn't correct the problem, contact the
software developer for further assistance.
For trap 000D errors, try the following:
o See Retain Tip #H083121, Section C for several known causes of Trap 000D
Errors.
o Definitely check RETAIN for similar errors. A number of Trap 000D errors
are caused by software bugs.
o If the error occurs every time within the same application and CHKDSK
doesn't correct the problem, contact the
software developer for further assistance.
o Check hardware. Trap 000D errors are occassionally caused by hardware
problems.
o Make sure all adapters are supported by OS/2.
o If using the enhanced memory adapter on a model 80-111 or 80-311 and it's in
slot #1, move to slot #4. If already
there, verify that the resistors are positioned diagonally across the
modules. If these resistors are not present,
replace the adapter with PN 34F2825.
o If this occurs during installation, test the system memory, any memory
adapters and the system board. Replace as
necessary.
o If it occurs within a Token Ring environment, ensure the Token Ring RAM
window is set at 16 KB.
o If it occurs while printing, install the newest printer driver and ensure
the most current CSD is installed.
o If system is a MCA machine, check to see if there are any applicable ECA's.
o Ensure the installed memory is the correct speed for the system board.
For trap 000E errors, try the following:
o Check RETAIN for similar errors. Some Trap 000E errors are caused by
software bugs.
o If the error occurs every time within the same application and CHKDSK
doesn't correct the problem, contact the
software developer for further assistance.
o Check hardware. Trap 000E errors are occassionally caused by hardware
problems.
[A]: Roderick Klein (rwklein@wxs.nl)
A general remark for everyboby who gets a trap!
Don't just hit the reset button and hope it won't come back, try and
trace a trap! One of the most helpfull hints is this! When a trap
occurs write down the CSLIM value. Is it FFFFFFFF never mind then just
hit reset... Is CLSIM != FFFFFFFF then you can be lucky!
After a reboot (if possible) go onto the internet and download this
tool:
ftp://hobbes.nmsu.edu/pub/os2/util/disk/exeinfo.zip (only 22kB).
This is the manual:
Exeinfo searches your partitions for executable code (device drivers,
file systems, EXEs, DLLs) that matches some criteria. To locate the module
that caused a trap, write down the CSLIM value that is reported. Then run
"exeinfo -f -lxxxx c:\*.*"
where xxxx is the CSLIM value and C: should be replaced by each driver
from which code may have been loaded.
If, for example, you get CSLIM=0000f113 and all your code is loaded
from the D drive because you have multiboot, type
exeinfo -f -lf113 d:\*.*
Another hint for fixpak 13 users and higher, got a Teles ISDN card! Rem
out this line:
DEVICE=D:\CAPI\VCAPI.SYS D:\CAPI
That driver is not that good with the WSeB kernel..... its not a fault
in the kernel the device driver has been written badly....
Also when you have an application that causes a trap. Its useless to
uninstall the app and reinstall. All apps are ring 3 code (they don't
run on kernel level!)
Usually its a sound driver or video driver, switch to standard VGA or
change resolution. Turn off sound, this way you can in many cases locate
the problem!
--- INN 2.7.3 (20241006 prerelease)
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