crt emu driver with hd4890 in crossfire

[cornhairboy]

Hello forum

I'm just in the middle of my build for the arcade machine and have managed to rig a fx6300 with a crossfire 4890. My question is whether this will work with the amazing driver by calamity?

I was going to hang on until my 7870 was supported but I'm impatient 😊

PSCX2 ran ok on one hd4890, I'm hoping it will make the most of the crossfire.

Any support or info would be great

Thanks

[Calamity]

It should work, although I don't know of anyone having tested it (crossfire).

[cornhairboy]

Ah ha, ok well I will be the test subject and let you know as soon as I have the rig setup at the weekend. Thanks for replying calamity

[sean_sk]

I've been testing with a HD 5970 which is essentially dual GPU card with built in crossfire and there are no issues that I can see. CRT Emudriver installs drivers for all GPU's without issues so I would say you shouldn't have any difficulties. Core functionality for that shouldnt have changed much, if at all for CRT Emudrivers.

[cornhairboy]

Well it worked with some adjustments, the old crt emu driver caused problems for me with low fps and bsod, now that might just be my configuration bit the new 2.0 driver works great. The crossfire was picked up straight away however I used this method -

1. Clean all drivers out and keep one card in.
2. Install new crt emu driver 2.0 following the guide for the hd4xxx and vmm.
3. Install gpu-z to monitor crossfire being enabled
4. Install 2nd card and windows found the crt emu driver automatically
5. Check gpu-z again and it shows enabled.
6. Ran some benchmarks 70fps on 3d mark vantage.

So I can confirm with the crossfire completed this way it does actually work. I really thought I was going to have problems with it having to go through ati catalyst control centre! But it didn't need it!

HOWEVER...... my next question is this.....

How do I get a 800 x 600 video mode set for my tv? I have no idea how to force this but I do know about a year ago I managed to get it working but now I cant.

Could someone please instruct me what to do to add a 800 x 600 interlaced mode?

Many thanks

[sean_sk]

How do I get a 800 x 600 video mode set for my tv? I have no idea how to force this but I do know about a year ago I managed to get it working but now I cant.

I couldnt get 800x600 to work for my setup so I tried an alternative.
Assuming you used "user_modes_super.ini" file in vmmaker to generate your mode list you could try adding:

 720 x 576 @ 60.000000 desktop

I found this was just as good. Problem with 800x600 was that it overscanned off the screen whereas 720x576 fit nicely.
Someone else may know a way to force it that i dont know.

[Calamity]

Getting 800x600 is very easy. First, add 800x600 to user_modes.ini or user_modes_super.ini, depending which one you're using.

Then, modify your crt_range like this:

crt_range0  15625-16200, 49.50-65.00, 2.000, 4.700, 8.000, 0.064, 0.192, 1.024, 0, 0, 192, 288, 448, 576

to

crt_range0  15625-16200, 49.50-65.00, 2.000, 4.700, 8.000, 0.064, 0.192, 1.024, 0, 0, 192, 288, 448, 600

That's all.

[cornhairboy]

That's great

Thanks calamity and Sean! Cant wait to get back and try these modes at the machine. How are the new drivers doing in supporting the hd7870s?

Thanks

[cornhairboy]

Calamity,

I've tried this on the monitor presets.txt and it says error in monitor range ignoring (then the whole range of numbers) interlaced lines max 600 out of range....

Any ideas?

Thanks

[Calamity]

Increase HfreqMax a bit.

[cornhairboy]

Calamity

Would that be 15625-16200 to 15625-16300? Is that the hfreq max?

Thanks

[cornhairboy]

Worked a treat!!! Your knowledge is invaluable calamity!