PCI twinhan dtv

[Graham]

I have a pci tv card , twinhan, but ive never mamanged to run any
software except the original install disk ... now .. when i view sky
news on ch82 , the pog locks and shuts down , sending a error report
as well

If I download the latest drivers etc from the web site .. everything
installs and works .. but the audio and video are slow , juddery , and
prone to periods of lock up ....

Any one any ideas . appart from ditch the card .. ??

the system is a intel P4 3.2 Ghz , pf21-ext m-board - 250 mb pci-ext
navidia video card ... 2 ghz ram ... not sure if its dual core ..
shows as 2 cpus on the device driver list ... winxp-pro

all the other prog's run fine ... media players , dvd video ..no
problems ..

everything is up to date ...

 

[R. McCarty]

Which PCI slot is card installed in ( Count from the Video - either
AGP or PCIe ). Usually most motherboards only provide one or
two slots with independent IRQ mappings. The sluggish response
may be due to IRQ sharing. While XP can handle this in normal
situations, there are some cards that do not perform well when they
are used in a "Shared IRQ" setup. Most motherboard manuals have
a IRQ map show how the slots are hard wired.

 

[Paul]

I have a pci tv card , twinhan, but ive never mamanged to run any
software except the original install disk ... now .. when i view sky
news on ch82 , the pog locks and shuts down , sending a error report
as well

If I download the latest drivers etc from the web site .. everything
installs and works .. but the audio and video are slow , juddery , and
prone to periods of lock up ....

Any one any ideas . appart from ditch the card .. ??

the system is a intel P4 3.2 Ghz , pf21-ext m-board - 250 mb pci-ext
navidia video card ... 2 ghz ram ... not sure if its dual core ..
shows as 2 cpus on the device driver list ... winxp-pro

all the other prog's run fine ... media players , dvd video ..no
problems ..

everything is up to date ...

In addition to the possibility of an IRQ issue, you may
want to consider what the software is doing with the data.

On some TV cards, they do it like this -

*******
Preview video only, or Preview video and record at the same time

TV_Card ----- DMA_PCI_Bus --+ +--- Copy_to_video_card_frame_buffer
| |
Write_To_Disk Read_From_Disk
| |
(DMA_PCI_Bus) (DMA_PCI_Bus)
| |
Disk_Drive_for_PVR_Data

*******
Record video only (no preview, just record it)

TV_Card ----- DMA_PCI_Bus --+
|
Write_To_Disk
|
(DMA_PCI_Bus)
|
Disk_Drive_for_PVR_Data

*******
Playback pre-recorded video (doesn't use the card at all)

+--- Copy_to_video_card_frame_buffer
|
Read_From_Disk
|
(DMA_PCI_Bus)
|
Disk_Drive_for_PVR_Data

*******

In those examples, "preview" or "live viewing" can be stressful
because of the datarates involved. For example, if the Disk_Drive_for_PVR_Data
was connected to the SIS180 chip on the PF21 Extreme motherboard, there
could be multiple 20MB/sec streams of data on the fly.

Try recording video (without looking at the images), then try
playback of that recorded content, and see if it is smoother.

Paul

 

[Graham]

Which PCI slot is card installed in ( Count from the Video - either
AGP or PCIe ). Usually most motherboards only provide one or
two slots with independent IRQ mappings. The sluggish response
may be due to IRQ sharing. While XP can handle this in normal
situations, there are some cards that do not perform well when they
are used in a "Shared IRQ" setup. Most motherboard manuals have
a IRQ map show how the slots are hard wired.











- Show quoted text -

...... Ok thats a good point .. at this momnet I dont know which slot
its in ..I will have a look at the book , the mother board has 3 pci
slots, listed as 32 bit , pci 2.3 , 133mb/s max throughput ... and
qty 1 pci express x16 (pci-e1) which has the video card in it

I dont see any referance to the use of the 3 pci slots ... only two
are white and the middle is yellow .. if that means anything ??

tnx - G ..