Manual settings in device manager

Lots of Plug and Play devices don't allow you to change settings in Device Manager, but if it is on a card you may be able to get it to use different settings by moving it to another slot, or by freeing up IRQs you are not using. What device is it and why do you want to change the I/O address?

Post in the hardware forum as a suggestion since this is a hardware not OS question. Give a person a fish, they eat for a day. Suggest they internet search and they learn a skill for a lifetime.

Thanks for the responses. This is a Lava PCI 8255 PIO card. It's an i/o card that has 24 programmable digital lines to control (with some extra electronics), lights, motors etc. Its assigned resources are currently D400-D407 as listed in dev mgr in W2K. As far as an IRQ, I don't think it has one. I wanted to try a different address like the one for the serial port (that I don't use). At this point its debateable whether this is a hardware or software problem.

Support page for PCI 8255 http://www.support.lavalink.com/ind... Page 19 in this: "Win 2000/XP does not assign an IRQ by default. An IRQ can be enabled, but will be assigned by Win 2000/XP and cannot be changed." http://support.lavalink.com/fileadm... You may?? need to assign EPP mode to your parallel ports in the bios Setup. Manual: http://support.lavalink.com/fileadm... It appears in Device Manager you select Ports (Com and LPT) - then the Parallel port LPTx - and you should be able to change the I/O address there. "I wanted to try a different address like the one for the serial port (that I don't use). At this point its debateable whether this is a hardware or software problem." Is there a yellow exclamation mark ! or yellow question mark ? or red X beside or on the Lava PCI 8255 entry? If none of those, it is probably working fine. The 8255 is basically a programmable parallel port. Whether you can use the I/O address or IRQ for a serial port is a crap shoot - because a serial port is a legacy device that cannot share both it's resource settings, in order for any other device to possibly use it's resources, the serial port(s) must be turned off in your bios Setup, and even then, some bioses will still not allow any other device to use that serial port's resources. You should be able to use other I/O addresses however.

I'm familiar with the 8255 PIO chip though using it on an older ISA card. It is somewhat similar to the parallel port if your trying to do hardware interfacing. My guess at this point is that W2Ks automating resources is going to get in my way if I want to reassign card resources.

If this is where you can't change the I/O address: "It appears in Device Manager you select Ports (Com and LPT) - then the Parallel port LPTx - and you should be able to change the I/O address there." Then you could try changing "PNP Aware OS installed" or similar in your bios Setup to NO if it set to YES, but it may not help. I see there is no mention at all of Win 2000 or XP in your 8255 manual. It would not surprise me if the card is useless in 2000/XP. Lava makes a PCI parallel port card that conflicts with SB16 cards, disabling their sound altogether, they knew about that and they never fixed the problem.