cannot get resolutions lower than 400x

[churkus]

Hi all,

firstly I am using an ATI X1300/X1550 (not too sure which one it is, that is how it is reported as in Windows and this was some OEM card lying in my bros "junk" box!).

I had previously just got round to installing soft15khz on Windows 7x64 and was able to sucessfully get a picture on my Sony KV29F1U Scart TV using a VGA to Scart cable. However it was showing no additional resolutions which from reading I think is a problem witn Windows 7.

So I had some time so I decided to go the whole hog and install Windows XP 64 bit, Calamitys CRT Emudriver 9.3. ALl installed fine, so I proceeded to run VMMaker, and got I think 109 modelines, but all the resolutions I want seem to be there I guess.

However, using ArcadeOSD, when I select a resolution lower than 400x, I get a black screen, and on some of them the PC reboots!. The same sub 400x resolutions will work when I connect back to my LCD monitor.

Is this a problem with my card not having the lower dotclock do you think or is it driver related?.

Any help appreciated.

[churkus]

well, luckily for me, me bro also had some other ati card and turns out its an x300 from some old dell. swapped it in and all resolutions working

so I guess the x1300/x1550 is definately one of the limited cards.

Thanks Calamity for this great stuff 

[Calamity]

Hi churkus,

Yes, sorry for being late, the X series, starting from some level (probably X800) have this problem with low dotclocks. The X300 on the other hand works great.

[Gray_Area]

My X800 worked tits with Soft15.

[churkus]

My X800 worked tits with Soft15.

lol it worked "tits"?. Is that a double negative or a double positive?