PC slowed down when reading a CompactFlash card

[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

 

[Gomma Pyle]

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

perhaps a cpu or ram shortage..............

 

[Matthieu Gaillet]

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

 

[Wayne Stallwood]

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

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.

 

[Shep©]

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

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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[Matthieu Gaillet]

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

 

[kony]

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.

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.

 

[Matthieu Gaillet]

I contacted the crew of Dan-Elec. They gave me no answer except bull shit.
Let's forget it and use a USB reader.....