i/o and memory addresses?

[nykrybaby97]

Hi everyone! I am soooooooo confused about these two configurable resources. Can someone please explain to me the difference between a memory address and an i/o address. Is a memory address a certain area of RAM that contains info some devices need in order to function? What about an i/o address? Is that referring to an area in RAM also or are the address ranges just simply an ID # for the CPU to identify the device? any help at all would be greatly appreciated. examples would be nice also. thank you.

[Trainor68]

Here's something hopefully that will help:

Memory addresses are addresses assigned to your entire memory (both RAM and ROM) that the system uses to identify your memory.

I/O addresses are those memory addresses that your CPU uses to get your devices attention and start running it's program(s). It is what the CPU uses to identify the device.

Memory addresses are assigned during bootup in what's called memory mapping. Memory addresses are sometimes not considered a resource, but they are usually included in the discussions on resources.

Hope this helps! http://www.PCGuide.com/ubb/rolleyes.gif