Hey! It's me again... (been a while) But yeah, I'm trying to find info on how to program PCI ports. More or less I'm interested in trying to poll my gfx card port to see what all can be done with it and whawt ports I'd write to so I can integrate direct GPU programming into my projects.

This link may help http://homepage.swissonline.ch/tinyasm/v3.htm
I think "3dmon.zip" is the one you want.

Thanks Dex. I'm intending on making a .INC file that can be generic for any OS. I have studied a lot more math to gain more understanding about 3D (and just for fun) and I have recently called NVidia for info about programming their GPUs, which they told me to send an email, which I did, and then they referred me to join their developer groups, which you need to be apart of a big business to join... So it looks like I'm alone with figuring this out.

Actually, I believe that still is a bit too much to go into (as I'm re-acquainting myself with low-level ASM programming), if anyone has a simple PCI programming tutorial that would be great to work with at first.

Thanks for the help!

I wrote some info here: http://board.flatassembler.net/topic.php?t=2353&start=0
Goto the ASHLEY4 posts (Note: that was my name then).
The post is for sound cards, but its the same for all devicers.

Thanks. PCI control is easier than I thought it would be.

One quick question, though. How did you know where to find the PCI bus at?

We started at the default 80000000h and scanned through them, once we find vendor/device ID, we get base etc.

Thanks, and how do you know the size of the PCI bus? (Sorry if I sound like I am asking stupid questions but PCI programming is a very new concept to me)

It OK thats how you learn, 0xfff8.
So you start at 0x80000000, test for vendor/device id, If not found, add 0x100, test for 0x80fff800, if = end, if not test for vendor/device id and loop again till you find id or get to the end (eg: 0x80fff800).

Thanks. From what I've heard, most graphics cards are developed the same way (as they're hard to develop from a different standard) and thus I think that most of the functions will be mostly the same, give or take a few.
Also, I was looking at that V3 graphics programming site you suggested, downloaded the thing, and realized they were using a PCI Bios interrupt for PCI as opposed to writing to the ports directly (which they could get away with 'cause they were using 32-bit DOS mode).

Get your device/vendor ID for your card from here: http://www.pcidatabase.com/
and add it to this simple program i made, you can run it from MiniDos if you do not have dos.

How do you want me to load in the vendor & device IDs? A simple addition of the two? Also, I got an error when it tried to add 80*10^6h and 40*10^6h (My apologies, scientific notation comes in handy at times like that) and move them into EAX.

I up loaded a fix and tested pci.asm, down load it again and try.
Vendor/device can be added like this:

Thanks! It's working, but I have the right card info and it's saying it's not being found.

What I have is an nVidia GeForce FX 5200 (that's all the device manager says it is), and according to the pcidatabase website, this was the info:

GeForce FX 5200 Device-ID: 0x0322
NVIDIA Vendor-ID: 0x10DE

EDIT - I just checked under Settings/Control Panel/System/Hardware/Device Manager/Display Adaptors/ then right clicked my chip and hit properties then went under the Details tab and it had the exact same settings as that website. So I tried my modem, and it didn't find it either. Is it 'cause Windows is blocking it?

Are you running that from Windows? I think that it could not work and you need to use BIOS instead or run it from DOS or MiniDOS as Dex suggested.

Okay, let me try that. Where can I get MiniDOS?

Forget using BIOS, http://www.cs.cmu.edu/~ralf/pub-files/rbpci119.zip didn't worked for me on XP SP2, "PCICFG.EXE *" displays nothing... Same problem skipping BIOS.


http://board.flatassembler.net/topic.php?t=5275

Thanks.

Strange... I'm trying to run MiniDOS on my PC I'm trying to do the test on, and it doesn't boot off the floppy. Yet I put the floppy in another older system and it gets read. Any ideas as to why this is happening?

Thanks!

-Rhyno

First as to why miniDos does not boot on, that PC i do not know it boots fine on all my test PC (over 20).
Also i try running the program in win98 and it worked, are you sure you got the id the right way round and try you sound card ID as i have only test it on sound cards.