[XCSSA] PCMCIA CardReader and a SCSI Card Broplems

[xcssa@xcssa.org]

On Friday 13 April 2007 19:41, xcssa-admin@xcssa.org wrote:
> I have a PCMCIA Card Reader the type that is mounted in a 3.5 inch drive
> bay and is attached to a PCI card that uses a PCIBus  PCI1420PDV chip when
> installed in my PC without a SCSI controller it works fine but when I
> install any SCSI controller (Tekram  SCSI controller and an Adaptec 2940**)
> it quits working.   I have noticed that when the PCMCIA card is closer to
> the AGP bus it will work and the SCSI will not and visa versa with the SCSI
> closer to the AGP bus the PCMCIA card will not work.  I have checked the
> settings in XP and errors out one or the other.  On a different machine I
> was first trying this on it actually damaged the SCSI controller a 2940
> card. Does anybody have an idea why this is.

Sounds like your problem is most likely that your motherboard's IRQ sharing is 
not playing nice with that hardware.  There is usually one of several fixes 
for this.  

1) try moving either your SCSI card or the PCMCIA-PCI card over by one slot.. 
and then going into the BIOS and telling the system to "rescan" 
or "reallocate" PCI/IRQ resources.  The PCI bus master will try to reassign 
IRQs to a workable configuration.

2) If your PCMCIA PCI card has adjustable IRQ settings.. then you may want to 
manually force the card's IRQ setting to an unused interrupt, and then tell 
the BIOS to reallocate IRQ settings again (or map around that manual 
setting).

Also.. some motherboards (when they're released) had buggy firmware which can 
cause IRQ sharing issues.  Regardless of 1&2.. I would also check and reflash 
your mobo to the latest firmware version.

Good luck..

Tweeks