PC slowed down when reading a CompactFlash card

  • Thread starter Thread starter Matthieu Gaillet
  • Start date Start date
M

Matthieu Gaillet

Hi freaks,

Could someone explain me why each time that I'm reading photos from my
compact flash card installed in a CF-to-PCMCIA, my PC becomes slow, the
mouse begins to react more or less randomly, the sound is bad (when playing
MP3), .... It seems that reading the card stops all the others activity...
Strange.

The card is detected as being connected to a PCMCIA IDE/ATAPI Controller,
using IRQ5 (ISA) (not shared) and transferring datas in PIO mode..

Thanks for helping

Matt
 
Matthieu Gaillet said:
Hi freaks,

Could someone explain me why each time that I'm reading photos from my
compact flash card installed in a CF-to-PCMCIA, my PC becomes slow, the
mouse begins to react more or less randomly, the sound is bad (when
playing MP3), .... It seems that reading the card stops all the others
activity... Strange.

The card is detected as being connected to a PCMCIA IDE/ATAPI Controller,
using IRQ5 (ISA) (not shared) and transferring datas in PIO mode..

Thanks for helping

Matt
Click to expand...

perhaps a cpu or ram shortage..............
 
No, there is plenty of free ram and the CPU is idle. You clearly feel that
when the PC access the CF, it cannot do something else at the same time, a
bit like when you were accessing floppy disk at the Win3.1 - Win95 times if
you remember...

Matt
 
Matthieu said:
The card is detected as being connected to a PCMCIA IDE/ATAPI Controller,
using IRQ5 (ISA) (not shared) and transferring datas in PIO mode..
Click to expand...

PIO mode disk access can hit CPU performance quite hard, if possible you
want this in DMA mode but I don't know if that is even possible with your
hardware.
 
Hi freaks,

Could someone explain me why each time that I'm reading photos from my
compact flash card installed in a CF-to-PCMCIA, my PC becomes slow, the
mouse begins to react more or less randomly, the sound is bad (when playing
MP3), .... It seems that reading the card stops all the others activity...
Strange.

The card is detected as being connected to a PCMCIA IDE/ATAPI Controller,
using IRQ5 (ISA) (not shared) and transferring datas in PIO mode..

Thanks for helping

Matt
Click to expand...

http://www.compactflash.org/faqs/faq.htm

I suspect the card should be in DMA mode as per another poster.As I
don't have a flash card I can't bench test how to apply this but the
above link should help.
HTH :)




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Okay... I'll try to set it to DMA, but if I remember well, the setting used
was "DMA if available"....
I don't have the CF right here, I'll make an update.

Thanks to all of you

Matt
 
Okay... I'll try to set it to DMA, but if I remember well, the setting used
was "DMA if available"....
I don't have the CF right here, I'll make an update.
Click to expand...

Odds are the card and flash only support PIO mode.
You might try another driver for the card, and if that fails
consider trying a USB2 reader.
 
I contacted the crew of Dan-Elec. They gave me no answer except bull shit.
Let's forget it and use a USB reader.....
 
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