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Video Capture: Troubleshooting Hardware Conflicts
Contents:
HARDWARE CONFLICTS - GENERAL NOTES
Hardware conflicts are one of the most common problems encountered when
adding the Intel Smart Video Recorder or Intel Smart Video Recorder Pro
to your computer. Hardware conflicts occur when the Intel Smart Video
Recorder or Intel Smart Video Recorder Pro and another device in your
computer share the same I/O address or interrupt (IRQ) setting.
WHAT IS AN I/O ADDRESS?
The I/O address is the path along which the add-in device sends and
receives data and instructions.
When two devices are assigned to the same I/O address, one or both of
the devices may not operate reliably.
The Intel Smart Video Recorder or Intel Smart Video Recorder Pro, like
many add-in boards, requires a unique I/O address. Valid I/O addresses
for the Intel Smart Video Recorder and Intel Smart Video Recorder Pro
are 2E4H (factory default setting), 310H, 320H, 340H, 350H, 360H, 3A0H,
and 3B0H.
WHAT IS AN IRQ?
The microprocessor in your computer works on only one task at a time.
When a device (such as the Intel Smart Video Recorder or Intel Smart
Video Recorder Pro) needs the processor to do some work, it sends an
interrupt request (IRQ) to get the processor's attention. When the
processor receives an interrupt request, it puts down the task it is
currently working on, executes the new instruction, then goes back to
the original task.
When two devices are assigned to the same IRQ, one or both of the
devices may not operate reliably. To ensure reliable operation of your
add-in device, it must be given its own IRQ.
Valid IRQ settings for the Intel Smart Video Recorder and the Intel
Smart Video Recorder Pro are 9, 10, 11 and 15.
AVOIDING HARDWARE CONFLICTS
Many add-in devices require unique IRQ and I/O address settings.
Unfortunately, the number of IRQs and I/O addresses available is
limited.
The best way to avoid a hardware conflict is to know the I/O address
and/or IRQ used by each device in your computer before adding a new
board. It is a good idea to keep a written record of the IRQ and I/O
address assignments for the devices in your computer. If you don't have
a written record of the IRQs and I/O addresses currently being used by
your system, you can find out this information by:
* examining the I/O address and IRQ switch settings (if applicable)
on the board,
* reading the product's Reference Manual or Installation Guide,
* contacting your local dealer or the manufacturer of the board and
asking for the valid IRQ and I/O address settings of the board (you
also may want to ask about the default factory settings for the
board),
* use the list below as a guideline:
0 = Timer Click
1 = Keyboard
2 = Cascade to IRQ 9
3 = COM Port 2
4 = COM Port 1
5 = open ( maybe)
6 = Floppy Disk Drive
7 = LPT1 (usable)
8 = Realtime Clock
9 = Redirected IRQ 2
10 = Open
11 = Open
12 = Bus or PS/2 style mouse
13 = Math Coprocessor
14 = IDE controller (Hard disk drive)
15 = Open
Note: These values are applicable only before add-in cards are
installed. Therefore this table should only be use as a guide.
SYMPTOMS OF AN I/O ADDRESS CONFLICT
Some of the common symptoms of an I/O address conflict (between the
Intel Smart Video Recorder or Intel Smart Video Recorder Pro and another
device in your computer) are:
* The Intel Smart Video Recorder or Intel Smart Video Recorder Pro
installation program doesn't recognize the Intel Smart Video
Recorder or Intel Smart Video Recorder Pro as an installed board.
* Your video capture application can't initialize the capture device.
* The Intel Smart Video Recorder or Intel Smart Video Recorder Pro
doesn't work.
SYMPTOMS OF AN IRQ CONFLICT
Some of the common symptoms of an IRQ conflict (between the Intel Smart
Video Recorder or Intel Smart Video Recorder Pro and another device in
your computer) are:
* Frames are dropped during video capture or playback
* Video capture or playback is slow.
* The system hangs.
* The display or data file is corrupt.
* Audio is not captured or played back.
* The video preview window in the capture program is black.
TROUBLESHOOTING HARDWARE CONFLICTS
If you suspect you have a hardware conflict:
Identify the device that is sharing an I/O address or IRQ setting with
the Intel Smart Video Recorder. The devices listed below generally have
I/O address and IRQ settings. One of these may be the contending
device:
-network card modem
-mouse sound board
-video card SCSI card
-printer COM ports
* Change the setting of the Intel Smart Video Recorder or Intel Smart
Video Recorder Pro according to the instructions in the
Installation Guide.
OR
* Change the IRQ or I/O address setting of the conflicting device.
See the Reference Manual or Installation Guide for that device.
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