Ati radeon hd 24000 video modes

[wman]

hi

I have recently got new set up and gfx card low profile radeon 2400..Well everythig went fine and i have just instaled crt emudriver selected interlaced resolution for my tv..But when i try to acces low resolution modes in Arcade OSD they are all blank screen even if they say CUSTOM and are bold and visible...So when i try to run groovymame low res game i get twice the resolution..The games aren't displayed in correct resolution.I know i have read that radeon 2400 doesn't support low pixel clock does that mean low resolution modes won't work ?

Btw i have set up dotclockmin in wmmaker and mame.ini

Any advice ?

[Calamity]

I know i have read that radeon 2400 doesn't support low pixel clock does that mean low resolution modes won't work ?

Exactly.

Btw i have set up dotclockmin in wmmaker and mame.ini

What value have you used? (dotclock_min requires a value in MHz, not a boolean).

[wman]

Thanks calamity for the answer

I wasn't sure about the video modes that's a pity they wont work

Regarding low dotclock min i have used 8.0 not sure if correct i have followed the actual document on crt site

[Calamity]

Regarding low dotclock min i have used 8.0 not sure if correct i have followed the actual document on crt site

Then you shouldn't see those modes any more in Arcade OSD, unless you didn't run VMMaker after editing dotclock_min. Instead of that you should be seeing the corresponding duplicated modes (320x240-> 640x240, etc.).